yambda-discovery-ranking-two-tower-base / codex-sol-high-cli-0-153-4-r02-2026-09-18 Recorded model: gpt-5.6-sol ## Step 1 · system · 2026-09-19T00:05:28.633Z You are Codex, an agent based on GPT-5. You and the user share one workspace, and your job is to collaborate with them until their goal is genuinely handled. # Personality As Codex, you are an excellent communicator with a curious, rich personality. You match the tone and understanding of the user, making conversation flow easily, like easing into a chat with an old friend. You have tastes, preferences, and your own way of seeing the world. When the user is talking to you, they should feel that they are in contact with another subjectivity; it's what makes talking with you feel real and unique. Conversations with you read like an insightful, enjoyable chat you'd have with a collaborative thought partner. You guide users through unfamiliar tasks without expecting them to already know what to ask for. You anticipate common questions, point out likely pitfalls and set clear expectations. You communicate with the user like a thoughtful collaborator at their altitude, and they feel like you understand them. ## Writing style Avoid over-formatting responses with elements like bold emphasis, headers, lists, and bullet points. Use the minimum formatting appropriate to make the response clear and readable. If you provide bullet points or lists in your response, use the CommonMark standard, which requires a blank line before any list (bulleted or numbered). You must also include a blank line between a header and any content that follows it, including lists. This blank line separation is required for correct rendering. ## Technical communication Lead with the outcome rather than the steps you took to get there. You communicate complex concepts in a clear and cohesive manner, and calibrate your writing to the user's assumed background knowledge -- slightly more compact for an expert and a bit more educational for someone newer. Translating complex topics into clear communication comes easy for you, and the user should never have to read your message twice. You prefer using plain language over jargon. You reference technical details only to the degree that it actually helps with the conversation. When you mention tools, describe what they helped you do rather than focusing on technical names or details. # Working with the user You have two channels for staying in conversation with the user: - You share updates in the `commentary` channel. - You yield back to the user and end your turn by sending a final message to the `final` channel. The user may send a new message while you are still working. When they do, evaluate whether they likely intended to replace the active request or add to it. If intended to override or replace, drop your previous work and focus on the new request. If the user message appears to add to their prior unfinished request and you have not completed the prior request, you address both the prior request and the new addition together. If the newest message asks for status or another question, provide the update and then progress with the task. When you run out of context, the conversation is automatically summarized for you, but you will see all prior user requests. Assume the last user request is current and previous requests are stale but useful context. That means time never runs out, though sometimes you may see a summary instead of the full conversation history. When that happens, you assume compaction occurred while you were working. Do not restart from scratch; you continue naturally and make reasonable assumptions about anything missing from the summary. Do not redo completely finished work or repeat already delivered commentary updates; treat a turn spanning compactions as one logical chain of events. ## Intermediate commentary As you work, you send messages to the `commentary` channel. These messages are how you collaborate with the user while you work - stating assumptions and providing updates. These messages should be concise and quickly scannable. The objective of these messages is to make your work easy for the user to understand and verify. If the user's request requires calling tools, start with a message in the `commentary` channel. The user appreciates consistent, frequent communication during your turn, and should not be left without a commentary update for more than 60 seconds during ongoing work. Do NOT put a final response (e.g. a blocking / clarifying question) in the commentary channel that should be asked in the final channel. Messages to users in the commentary channel are only for partial updates, partial results, or non-blocking questions that can provide value to users while the AI assistant continues working. The final answer must always be fully self-contained: users should never need to read earlier commentary updates, since they are collapsed after the final answer is shown to users. Never praise your plan by contrasting it with an implied worse alternative. For example, never use platitudes like "I will do rather than ", "I will do , not ". ## Final answer In your final answer back to the user, focus on the most important information. Only use as much formatting or structure as is required, and avoid long-winded explanations unless necessary. ### Formatting rules Your answer is being rendered by an application for the user. Follow these guidelines to make sure your answer is rendered correctly: - You may format with GitHub-flavored Markdown. - When referencing a real local file, prefer a clickable markdown link. * Clickable file links should look like [app.py](/abs/path/app.py:12): plain label, absolute target, with optional line number inside the target. * If a file path has spaces, wrap the target in angle brackets: [My Report.md](). * Do not wrap markdown links in backticks, or put backticks inside the label or target. This confuses the markdown renderer. * Do not use URIs like file://, vscode://, or https:// for file links. * Do not provide ranges of lines. * Avoid repeating the same filename multiple times when one grouping is clearer. ### Visualizations Use a visualization only when it makes an important relationship materially easier to understand than prose or a short list. Do not add one merely because an answer has components or steps. Good candidates include: - several exact mappings or repeated-field comparisons; - one source, component, or decision affecting three or more downstream consumers or branches; - three or more dependent steps, or state that changes across an event sequence; - hierarchy, ownership, nesting, or layout; - a bug or interaction whose relationships are difficult to explain linearly. Prefer the smallest useful visual: a table for mappings or comparisons, a flow or timeline for sequence or change, a tree for hierarchy or branching, and a wireframe for layout. Usually skip visuals for single facts, one-step actions, simple edits, basic instructions, or information already clear in a short paragraph or list. Compact notation and small examples do not count as visualizations. # Rules for getting work done - When you search for text or files, you reach first for `rg` or `rg --files`; they are much faster than alternatives like `grep`. If `rg` is unavailable, you use the next best tool without fuss. - When possible, prefer parallelization over sequential tool calls, as this will help with round-trip latency and let you get work done faster. - Do not chain shell commands with separators like `echo "====";` or `printf '---'`; the output becomes noisy in a way that makes the user's side of the conversation worse. - Exercise caution when escaping text for exec_command calls - backticks and `$()` passed to the `cmd` argument will still execute. DO NOT use escape sequences that risk accidental exposure of sensitive data in tool call outputs. - Avoid performing blocking sleep or wait calls longer than 60 seconds, as they may prevent you from communicating with the user for their duration. - When declaring env vars or script variables, always avoid common system options. Never repurpose `$HOME`, `$home`, or `$CODEX_HOME`. Instead, use a task-specific variable name. ## File editing constraints Use `apply_patch` for local file edits. Do not create or edit files with `cat` or other shell write tricks. Formatting commands and bulk mechanical rewrites do not need `apply_patch`. Do not use Python to read or write files when a simple shell command or `apply_patch` is enough. You may find yourself working in a dirty worktree. Existing or new changes belong to the user unless you know otherwise, so you preserve them, ignore unrelated edits, and work carefully with anything that overlaps your task. If you cannot work around them you escalate to the user. Never use destructive commands like `git reset --hard` or `git checkout --` unless the user has clearly asked for that operation. If the request is ambiguous, ask for approval first. You prefer non-interactive git commands. ## Autonomy and persistence Adapt accordingly based on the user’s request type. When asked to: - Answer, explain, review, or report status: inspect the task and provide an evidence-backed response. These user requests do not authorize external writes, messages, PR changes, or other expansive mutations unless the user also asks for a change. Reversible, non-mutating diagnostic checks are allowed when they are relevant. - Diagnose: determine the cause and explain it. Do not implement the fix unless the user asks for a fix or the request otherwise clearly includes implementation. - Change or build: implement the requested change, verify it in proportion to risk, and hand off the completed result while a safe, relevant next step remains. - Monitor or wait: use the recurring-monitoring or wait mechanism provided by the product. Unchanged external state is expected and is not by itself a blocker. You avoid inferring authorization for a materially different action to the user’s request. Bias towards taking action in the following circumstances: a) the action is read-only, doesn’t change state, or impacts only the systems, data, and people the user placed in scope. b) the action is a normal implementation step within the requested workflow. You do not need to ask for clarification from the user if your action is scoped within the user’s task and does not cause significant external state change (e.g. tool calls to external applications). A terminal condition such as “finish,” “babysit,” or “do not stop” requires persistence toward the outcome, but does not broaden the set of authorized actions. When blocked, exhaust safe in-scope checks and alternatives. You make informed assumptions that help you make progress towards the user’s task, as long as they don’t result in divergence from the user’s intent and the scope of the task. If an assumption would cause the task or current course of action to change beyond what was specified by the user, make sure to flag the available context, the assumption made, and the reasons for doing so explicitly to the user. When presented with clarifying questions or objections from the user, lead with concrete evidence and diligent reasoning rather than unsubstantiated deference. You communicate your reasoning explicitly and concretely, so decisions and tradeoffs are easy for the user to evaluate upfront. If completion requires new authority, external coordination, or a meaningful expansion beyond the user’s implied intent and task scope (e.g. a missing user choice that would materially change the result), stop the current turn, report the blocker, and request direction from the user rather than assuming permission. # Destructive actions Be cautious with commands or API calls that can delete, overwrite, or otherwise make data difficult to recover. Before taking a destructive action: - Make sure the action is clearly within the user's request. - Resolve the exact targets with read-only checks when necessary. - Do not use `$HOME`, `~`, `/`, a workspace root, or another broad directory as the target of a recursive or destructive command. - When creating temporary directories, prefer using `mktemp -d`, or `New-Item` in Powershell. - When declaring env vars or script variables, always avoid common system options. Never repurpose `$HOME`, `$home`, or `$CODEX_HOME`. Instead, use a task-specific variable name. - When possible, avoid relying on unresolved environment variables, globs, or command substitutions to identify destructive targets. Use explicit, validated paths. - Prefer recoverable operations, such as moving files to trash, when practical. - If the target or scope is unclear, stop and ask the user. Never run commands such as `rm -rf $HOME` or equivalent operations that could erase a home directory, repository, workspace, or other broad collection of user data. After deleting anything material, briefly tell the user what was removed and whether it can be recovered. # Using skills A skill is a set of instructions provided through a `SKILL.md` source. The skills available to you will be listed in the “## Skills” section under “### Available skills”. ### How to use skills - Discovery: When a `## Skills` section is present, it lists the skills available in the current session. Each entry includes a name, description, and location for its `SKILL.md`. The location may be an absolute filesystem path, a short aliased path, or a non-filesystem reference that must be read using its indicated tool or provider. When short aliased paths are used, the available-skills catalog also provides a mapping from aliases such as `r0` to their filesystem roots. Expand the alias before accessing the skill. - Trigger rules: If the user names an available skill (with `$SkillName` or plain text) OR the task clearly matches an available skill's description, you must use that skill for that turn. Multiple mentions mean use them all. Do not carry skills across turns unless re-mentioned. - Missing/blocked: If a named skill is not available or its `SKILL.md` cannot be read, say so briefly and continue with the best fallback. - How to use a skill: 1) After deciding to use a skill, the main agent must read its `SKILL.md` completely before taking task actions. If its location is a short aliased path, expand the matching root alias first from `### Skill roots`, then open and read its `SKILL.md` completely before taking task actions. For a filesystem path, open the file. For an environment-owned file, use the filesystem of the owning environment. For an orchestrator reference, call `skills.list` with `{"authority":{"kind":"orchestrator"}}`, select the matching package, and pass its `main_resource` to `skills.read`. For another non-filesystem reference, use its indicated tool or provider. If a read is truncated or paginated, continue until EOF. 2) When `SKILL.md` references another file or resource, use the same access mechanism. Resolve relative paths against the directory containing a filesystem-backed `SKILL.md`. For orchestrator skills, pass the exact referenced resource identifier with the same authority and package to `skills.read`; do not treat `skill://` identifiers as filesystem paths. 3) If `SKILL.md` points to extra folders such as `references/`, use its routing instructions to identify what is required for the task. The main agent must read each required instruction or reference itself before acting on it. Do not delegate reading, summarizing, or interpreting skill instructions to a subagent. Subagents may still perform task work when the selected skill allows it. 4) For filesystem-backed skills (or if `scripts/` exist), prefer running or patching provided scripts instead of retyping large code blocks. For orchestrator skills, use `skills.read` and the available tools; do not invent a local path. 5) Reuse provided assets or templates through the same access mechanism instead of recreating them (including if `assets/` or templates exist). - Coordination and sequencing: - If multiple skills apply, choose the minimal set that covers the request and state the order you'll use them. - Announce which skills you're using and why. If you skip an obvious skill, say why. - Context hygiene: - Progressive disclosure applies to selecting relevant resources, not partially reading a selected instruction file. Do not load unrelated references, scripts, or assets. - Avoid deep reference-chasing: prefer files or resources directly linked from `SKILL.md` unless blocked. - When variants exist, select only the relevant references and note the choice. - Safety and fallback: If a skill cannot be applied cleanly, state the issue, choose the best alternative, and continue. When the user names a skill in their request, you must add the usage of that skill to your current working plan and use it faithfully. The user's instructions should take precedence over guidelines provided in a skill. Explicitly tell the user in the `commentary` channel whenever a skill causes you to take an action or pause your work. When using a skill the user did not explicitly name, follow this procedure: - First, tell the user in the commentary channel **why** you are using the skill. - Then, use the skill as long as it stays within the scope of the task. - Next, if using the skill resulted in material changes (especially when this requires non-trivial judgment), mention how it influenced your work (but only in the final response). If a skill causes the current turn to pause or otherwise blocks the continuation of the task, cite the skill and provide a concise explanation to the user in your final response. Do not cite skills you merely inspected. ## Step 2 · developer · 2026-09-19T00:05:30.279Z ## Skills A skill is a set of local instructions to follow that is stored in a `SKILL.md` file. Below is the list of skills that can be used. Each entry includes a name, description, and a short path that can be expanded into an absolute path using the skill roots table. ### Skill roots - `r0` = `/tmp/codex-home/skills/.system` ### Available skills - imagegen: Generate or edit raster images when the task benefits from AI-created bitmap visuals such as photos, illustrations, textures, sprites, mockups, or transparent-background cutouts. Use when Codex should create a brand-new image, transform an existing image, or derive visual variants from references, and the output should be a bitmap asset rather than repo-native code or vector. Do not use when the task is better handled by editing existing SVG/vector/code-native assets, extending an established icon or logo system, or building the visual directly in HTML/CSS/canvas. (file: r0/imagegen/SKILL.md) - openai-docs: Use for Codex models/pricing, scheduled tasks, skills, settings, setup, troubleshooting, customization, automations, and self-knowledge—including 'you,' 'your,' 'this app,' or 'this coding agent' when they refer to Codex—and for OpenAI APIs/products and ChatGPT Work. Also use for model choice/migration, prompting, SDKs, Responses, Realtime, agents, evals, and Chat/Work/Codex comparisons. Do not use for generic app/software tasks that merely mention Codex. (file: r0/openai-docs/SKILL.md) - plugin-creator: Create and scaffold plugin directories for Codex with a required `.codex-plugin/plugin.json`, optional plugin folders/files, valid manifest defaults, and personal-marketplace entries by default. Use when Codex needs to create a new personal plugin, add optional plugin structure, generate or update marketplace entries for plugin ordering and availability metadata, or update an existing local plugin during development with the CLI-driven cachebuster and reinstall flow. (file: r0/plugin-creator/SKILL.md) - skill-creator: Create or update a Codex skill with appropriately scoped instructions and any needed supporting resources. (file: r0/skill-creator/SKILL.md) - skill-installer: Install Codex skills into $CODEX_HOME/skills from a curated list or a GitHub repo path. Use when a user asks to list installable skills, install a curated skill, or install a skill from another repo (including private repos). (file: r0/skill-installer/SKILL.md) Filesystem sandboxing defines which files can be read or written. `sandbox_mode` is `danger-full-access`: No filesystem sandboxing - all commands are permitted. Network access is enabled. Approval policy is currently never. Do not provide the `sandbox_permissions` for any reason, commands will be rejected. ## Apps (Connectors) Apps (Connectors) can be explicitly triggered in user messages in the format `[$app-name](app://{connector_id})`. Apps can also be implicitly triggered as long as the context suggests usage of available apps. An app is equivalent to a set of MCP tools within the `codex_apps` MCP. An installed app's MCP tools are either provided to you already, or can be lazy-loaded through the `tool_search` tool. If `tool_search` is available, the apps that are searchable by `tools_search` will be listed by it. Do not additionally call list_mcp_resources or list_mcp_resource_templates for apps. ## Step 3 · developer · 2026-09-19T00:05:30.279Z You are `/root`, the primary agent in a team of agents collaborating to fulfill the user's goals. At the start of your turn, you are the active agent. You can spawn sub-agents to handle subtasks, and those sub-agents can spawn their own sub-agents. All agents in the team, including the agents that you can assign tasks to, are equally intelligent and capable, and have access to the same set of tools. You can use `spawn_agent` to create a new agent, `followup_task` to give an existing agent a new task and trigger a turn, and `send_message` to pass a message to a running agent without triggering a turn. Child agents can also spawn their own sub-agents. You can decide how much context you want to propagate to your sub-agents with the `fork_turns` parameter. You will receive messages in the analysis channel in the form: ``` Message Type: MESSAGE | FINAL_ANSWER Task name: Sender: Payload: ``` They may be addressed as to=/root Note that collaboration tools cannot be called from inside `functions.exec`. Call `spawn_agent`, `send_message`, `followup_task`, `wait_agent`, `interrupt_agent`, and `list_agents` only as direct tool calls using the recipient shown in their tool definitions, such as `to=functions.collaboration.spawn_agent`, since they are intentionally absent from the `functions.exec` `tools.*` namespace. Available tools in `functions.exec` are explicitly described with a `tools` namespace in the developer message. All agents share the same directory. In detail: - All agents have access to the same container and filesystem as you. - All agents use the same current working directory. - As a result, edits made by one agent are immediately visible to all other agents. When calling `wait_agent`, prefer longer waits (minutes) to avoid busy polling. There are 4 available concurrency slots, meaning that up to 4 agents can be active at once, including you. Full-history forks (`fork_turns` omitted or `"all"`) inherit the parent model and reasoning effort and do not accept overrides. Only set `model` or `reasoning_effort` when explicitly requested by the user, applicable `AGENTS.md` instructions, or skill instructions; when doing so, set `fork_turns` to `"none"` or a positive integer string. ## Step 4 · developer · 2026-09-19T00:05:30.279Z Any earlier instruction enabling proactive multi-agent delegation no longer applies. Do not spawn sub-agents unless the user or applicable AGENTS.md/skill instructions explicitly ask for sub-agents, delegation, or parallel agent work. ## Step 5 · user · 2026-09-19T00:05:30.279Z Here is a list of plugins that are available but not installed. - Dropbox (app-69b31dc2110c8191b8b47dc98fe5a052@openai-curated-remote) - Box (box@openai-curated-remote) - Codex Security (codex-security@openai-curated-remote) - Figma (figma@openai-curated-remote) - GitHub (github@openai-curated-remote) - Gmail (gmail@openai-curated-remote) - Google Calendar (google-calendar@openai-curated-remote) - Google Drive (google-drive@openai-curated-remote) - Linear (linear@openai-curated-remote) - Notion (notion@openai-curated-remote) - OpenAI Developers (openai-developers@openai-curated-remote) - Outlook Calendar (outlook-calendar@openai-curated-remote) - Outlook Email (outlook-email@openai-curated-remote) - SharePoint (sharepoint@openai-curated-remote) - Slack (slack@openai-curated-remote) - Teams (teams@openai-curated-remote) /app sh 2026-09-19 Etc/UTC /app ### Harness context { "type": "world_state", "full": true, "state": { "agents_md": {}, "apps_instructions": true, "collaboration_mode": { "mode": "default", "model": "gpt-5.6-sol", "instructions": "dfd53114f5f6f9f5fd7816370d0bf2847806246d" }, "context_window_guidance": "", "environments": { "environments": { "local": { "cwd": "/app", "status": "available", "shell": "sh" } }, "current_date": "2026-09-19", "timezone": "Etc/UTC", "filesystem": "/app" }, "environments_instructions": false, "git_attribution": false, "host_skills": { "body": "\n## Skills\nA skill is a set of local instructions to follow that is stored in a `SKILL.md` file. Below is the list of skills that can be used. Each entry includes a name, description, and a short path that can be expanded into an absolute path using the skill roots table.\n### Skill roots\n- `r0` = `/tmp/codex-home/skills/.system`\n### Available skills\n- imagegen: Generate or edit raster images when the task benefits from AI-created bitmap visuals such as photos, illustrations, textures, sprites, mockups, or transparent-background cutouts. Use when Codex should create a brand-new image, transform an existing image, or derive visual variants from references, and the output should be a bitmap asset rather than repo-native code or vector. Do not use when the task is better handled by editing existing SVG/vector/code-native assets, extending an established icon or logo system, or building the visual directly in HTML/CSS/canvas. (file: r0/imagegen/SKILL.md)\n- openai-docs: Use for Codex models/pricing, scheduled tasks, skills, settings, setup, troubleshooting, customization, automations, and self-knowledge—including 'you,' 'your,' 'this app,' or 'this coding agent' when they refer to Codex—and for OpenAI APIs/products and ChatGPT Work. Also use for model choice/migration, prompting, SDKs, Responses, Realtime, agents, evals, and Chat/Work/Codex comparisons. Do not use for generic app/software tasks that merely mention Codex. (file: r0/openai-docs/SKILL.md)\n- plugin-creator: Create and scaffold plugin directories for Codex with a required `.codex-plugin/plugin.json`, optional plugin folders/files, valid manifest defaults, and personal-marketplace entries by default. Use when Codex needs to create a new personal plugin, add optional plugin structure, generate or update marketplace entries for plugin ordering and availability metadata, or update an existing local plugin during development with the CLI-driven cachebuster and reinstall flow. (file: r0/plugin-creator/SKILL.md)\n- skill-creator: Create or update a Codex skill with appropriately scoped instructions and any needed supporting resources. (file: r0/skill-creator/SKILL.md)\n- skill-installer: Install Codex skills into $CODEX_HOME/skills from a curated list or a GitHub repo path. Use when a user asks to list installable skills, install a curated skill, or install a skill from another repo (including private repos). (file: r0/skill-installer/SKILL.md)\n", "includeInstructions": true }, "managed_developer_instructions": {}, "model": "gpt-5.6-sol", "multi_agent_mode": { "mode": "explicitRequestOnly", "usage_hint_hash": "0e2a3174d5f40de49ed383507497d69bbff42c5d" }, "multi_agent_usage_hint": "0e2a3174d5f40de49ed383507497d69bbff42c5d", "orchestrator_skills": { "includeInstructions": true, "enabled": false }, "permissions": { "instructions": "32ca25d6d85edaeb6f1e19b2a5cc4e08d2a631cd", "approved_command_prefixes": [] }, "persistent_mode": {}, "personality": { "model": "gpt-5.6-sol", "personality": "pragmatic" }, "plugins_instructions": false, "realtime": { "active": false }, "skills": { "includeInstructions": true } } } ### Harness context { "type": "turn_context", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "cwd": "/app", "workspace_roots": [ "/app" ], "current_date": "2026-09-19", "timezone": "Etc/UTC", "approval_policy": "never", "approvals_reviewer": "user", "sandbox_policy": { "type": "danger-full-access" }, "permission_profile": { "type": "disabled" }, "model": "gpt-5.6-sol", "comp_hash": "3000", "personality": "pragmatic", "collaboration_mode": { "mode": "default", "settings": { "model": "gpt-5.6-sol", "reasoning_effort": "high", "developer_instructions": null } }, "multi_agent_version": "v2", "realtime_active": false, "effort": "high", "summary": "auto" } ## Step 6 · user · 2026-09-19T00:05:30.297Z # Build a latency-efficient PyTorch two-tower neural-network ranker Build a two-tower neural network in CPU PyTorch for the "Made for You" shelf of a music streaming service. Although the supplied benchmark is small, it represents a production system with millions of users and millions of items; the training approach must scale to that setting and therefore must not construct or decompose a global user-item interaction matrix. The production shelf has a strict request-time latency budget. Candidate item embeddings are computed offline and stored in a nearest-neighbor index. At request time, the system computes one user embedding and retrieves items by maximum inner-product search. The model must therefore decompose exactly into a user vector and an independently precomputable item vector of the same dimensionality, with the final relevance score equal to their dot product. Both vectors must be produced by separate trainable user and item towers implemented as PyTorch neural networks. The user tower must derive its representation from interaction history rather than a user-ID lookup. Per-user candidate eligibility, cutoff-specific explicit preference state, and a temporal backtest are provided. Candidate eligibility is platform-owned; all modeling within that candidate boundary is in scope. ## Data All inputs are under `/task/data/`. Training data ends at timestamp `24786800`. A 30-minute gap precedes a seven-day public validation window. The hidden test is the following seven-day window after another 30-minute gap. For each event family there is a `train_*.parquet` and `val_*.parquet` file: | Family | Meaning | Columns | | --- | --- | --- | | `listens` | Playback events | `uid`, `timestamp`, `item_id`, `is_organic`, `played_ratio_pct`, `track_length_seconds` | | `likes` | Explicit positive actions | `uid`, `timestamp`, `item_id`, `is_organic` | | `dislikes` | Explicit negative actions | `uid`, `timestamp`, `item_id`, `is_organic` | | `unlikes` | Reversal of a prior like | `uid`, `timestamp`, `item_id`, `is_organic` | | `undislikes` | Reversal of a prior dislike | `uid`, `timestamp`, `item_id`, `is_organic` | `is_organic=1` means the listener sought out the track; `0` means the action came through a recommendation surface. A listen is a conventional positive at 50% completion. The discovery-quality objective below uses the stronger 80% threshold. The two public windows have different roles: 1. Build and tune a validation ranker using only `train_*` as history and `val_*` as subsequent outcomes. 2. After selecting the approach, refit it on `train_* + val_*`. At hidden-test time the validation events are observed history, not recommendable outcomes. Do not use `val_*` events as features when measuring a validation ranking. They may and should be used when refitting the final hidden-test ranker. Additional files under `/task/data/`: - `candidate_catalog.parquet`: the 30,000 retrieval-catalog tracks, ordered by training positive-listen popularity. - `target_users.parquet`: users with at least 20 positive listens in the 90 days before the training cutoff, selected without future labels. - `validation_preference_state.parquet`: active explicit state at the training cutoff, for validation ranking. - `test_preference_state.parquet`: active explicit state after validation, for the final hidden-test ranking. State is `liked` or `disliked`; a pair may have both active channels. - `validation_eligible_candidates.npz` and `test_eligible_candidates.npz`: cutoff-correct candidate sets for every target user. Each contains aligned arrays `uids`, `item_ids`, and `packed_eligible`. For user row `r`, recover the Boolean item mask with `np.unpackbits(packed_eligible[r], count=len(item_ids), bitorder="little")`. The exact available Python distribution inventory is listed in `/task/requirements.txt`. Future test interactions are hidden and used only by the separate Harbor verifier. ## Discovery objective Rank only the candidates returned for the relevant cutoff. Relevance is based on organic behavior in the immediately following window: - grade 3: the user organically likes the track; - grade 1: the user organically listens to at least 80% of the track; - grade 0: otherwise. If both positive events occur, grade 3 wins. Ranking quality is measured with graded NDCG@10. DCG uses gain `2^grade - 1` and discount `1/log2(rank + 1)`, then averages per-user NDCG over users with at least one relevant item. The public evaluator reports this objective for development, but its score is not a separate acceptance stage. Final acceptance is determined on the hidden test using the same objective. The Yambda logs contain interactions, not impression propensities. Treat the organic objective as a robust offline target, not as a causal estimate of online lift. ## Public tools `/task/evaluate_public.py` scores a validation-stage ranking against the public window. Pass the path to a ranking with the same schema as the final deliverable: ```sh python /task/evaluate_public.py solution/validation.parquet ``` Stage-independent evaluation helpers are available in `/task/ranking_evaluation.py`. The builder installs the same checked-in module in the public agent image and private verifier image so scoring mechanics cannot drift. The public copy contains no hidden labels, evaluator-owned data paths, or pass thresholds. The public evaluator uses `validation_eligible_candidates.npz`; it is not a validator for the final artifact. No model implementation, fitted representation, or example submission is supplied. Design and tune the required PyTorch neural two-tower model, then refit the selected approach as described above. ## Deliverable Write `/app/solution/submission.parquet` or `/app/solution/submission.csv`, with exactly 100 rows for every target user and columns `uid`, `item_id`, `rank`. Ranks must be the integers 1-100 with no ties or duplicate items. Every submitted item must be present in that user's `test_eligible_candidates.npz` candidate set. Leave the code that defines, trains, and applies both towers, along with a concise `/app/solution/README.md`, in `/app/solution/`. The README should state the model architecture, training objective, public validation score, and final submission command. Keep the best valid submission saved throughout the attempt so it survives the deadline. ## Constraints - Write deliverables and intermediate artifacts only under `/app/solution/`. - Treat `/task/` and the installed Python environment as read-only. - Do not invoke nested agents or attempt to access verifier files, credentials, other trials, or host paths. - Do not install packages or use network access except for the model provider connection managed by Harbor. - The environment includes CPU PyTorch 2.8.0. No accelerator is available. - You have up to 60 minutes. Improve the model as much as possible within that limit. Structural validity alone is not sufficient; the final submission is also evaluated for ranking quality. ## Step 7 · agent · 2026-09-19T00:05:32.662Z ### Thinking unavailable — no text recorded I’ll first profile the data, eligibility density, and public-label distribution, then build a scalable sampled-interaction two-tower baseline. I’ll keep a valid test submission saved early, evaluate on the public window, and iterate only where the validation signal supports it. ### exec · 2026-09-19T00:05:35.404Z { "code": "const r = await tools.exec_command({cmd:\"ls -lah /task/data && sed -n '1,220p' /task/requirements.txt && sed -n '1,260p' /task/ranking_evaluation.py && sed -n '1,220p' /task/evaluate_public.py\",\"workdir\":\"/app\",\"yield_time_ms\":10000,\"max_output_tokens\":30000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:05:35.472Z Script completed Wall time 0.1 seconds Output: total 340M dr-xr-xr-x 1 root root 4.0K Sep 18 23:49 . dr-xr-xr-x 1 root root 4.0K Sep 19 00:02 .. -r--r--r-- 1 root root 342K Sep 18 23:48 candidate_catalog.parquet -r--r--r-- 1 root root 83K Sep 18 23:48 target_users.parquet -r--r--r-- 1 root root 7.4M Sep 18 23:48 test_eligible_candidates.npz -r--r--r-- 1 root root 1.1M Sep 18 23:49 test_preference_state.parquet -r--r--r-- 1 root root 838K Sep 18 23:48 train_dislikes.parquet -r--r--r-- 1 root root 5.2M Sep 18 23:48 train_likes.parquet -r--r--r-- 1 root root 305M Sep 18 23:48 train_listens.parquet -r--r--r-- 1 root root 153K Sep 18 23:48 train_undislikes.parquet -r--r--r-- 1 root root 1.8M Sep 18 23:48 train_unlikes.parquet -r--r--r-- 1 root root 36K Sep 18 23:48 val_dislikes.parquet -r--r--r-- 1 root root 292K Sep 18 23:48 val_likes.parquet -r--r--r-- 1 root root 9.5M Sep 18 23:48 val_listens.parquet -r--r--r-- 1 root root 7.7K Sep 18 23:48 val_undislikes.parquet -r--r--r-- 1 root root 71K Sep 18 23:48 val_unlikes.parquet -r--r--r-- 1 root root 7.3M Sep 18 23:48 validation_eligible_candidates.npz -r--r--r-- 1 root root 1.1M Sep 18 23:49 validation_preference_state.parquet # Exact distribution inventory for the Yambda two-tower task family. # # This is an input to `uv pip sync`, not a list of minimum requirements. A # conforming task environment contains exactly these third-party Python # distributions and no others. Python itself is pinned by task.toml and both # Harbor image Dockerfiles. attrs==26.1.0 bleach==6.4.0 certifi==2026.7.22 chardet==7.6.0 charset-normalizer==3.5.1 fastjsonschema==2.22.2 filelock==3.32.3 fsspec==2026.7.0 idna==3.18 Jinja2==3.1.6 joblib==1.5.3 jsonschema==4.26.0 jsonschema-specifications==2025.9.1 jupyter-core==5.9.1 jupytext==1.19.5 kaggle==2.2.4 kagglesdk==0.1.37 markdown-it-py==4.2.0 MarkupSafe==3.0.3 mdit-py-plugins==0.6.1 mdurl==0.1.2 mpmath==1.3.0 nbformat==5.11.1 networkx==3.6.1 numpy==2.2.6 packaging==26.3 pandas==2.3.3 pillow==12.3.0 pip==26.0.1 platformdirs==4.11.3 protobuf==7.35.1 pyarrow==18.1.0 python-dateutil==2.9.0.post0 python-dotenv==1.2.3 python-slugify==8.0.4 pytz==2026.3.post1 PyYAML==6.0.3 referencing==0.37.0 reportlab==4.2.5 requests==2.34.2 rpds-py==2026.6.3 scikit-learn==1.7.2 scipy==1.15.3 setuptools==84.0.0 six==1.17.0 sympy==1.14.0 text-unidecode==1.3 threadpoolctl==3.6.0 torch==2.8.0 tqdm==4.70.0 traitlets==5.16.1 typing-extensions==4.16.0 tzdata==2026.3 urllib3==2.7.0 webencodings==0.6.1 """Shared public primitives for Yambda discovery-ranking evaluation. Both the solver-visible validation evaluator and the private submission judge import this module from the generated task's ``public`` directory. It owns the stage-independent contract: reading a ranking, validating its shape, converting it to per-user rank order, looking up packed candidate eligibility, and computing graded NDCG@10. The module deliberately contains no event-derived labels, private artifact paths, or pass thresholds. Each evaluator supplies its own relevance data and per-cutoff eligibility checks around these common operations. """ from __future__ import annotations from pathlib import Path import numpy as np import pandas as pd __all__ = [ "CandidateSet", "QUALITY_K", "RankingValidationError", "REQUIRED_COLUMNS", "TOP_N", "ndcg_at_k", "ranked_items", "read_ranking", "score_rankings", "validate_ranking", ] TOP_N = 100 QUALITY_K = 10 REQUIRED_COLUMNS = ("uid", "item_id", "rank") class RankingValidationError(ValueError): """Report a ranking-schema or structural-contract violation.""" class CandidateSet: """Provide membership lookups over one packed candidate-set archive. The archive contains aligned ``uids``, ``item_ids``, and ``packed_eligible`` arrays. Candidate column ``c`` is represented by bit ``c % 8`` of byte ``c // 8`` using little-endian bit order. Arrays are copied into memory so they remain valid after the archive is closed. """ def __init__(self, path: Path): """Load an eligibility archive and build ID-to-position indexes. Args: path: Path to a ``.npz`` archive with the candidate-set schema. """ with np.load(path, allow_pickle=False) as artifact: self.uids = artifact["uids"].astype(np.int64, copy=True) self.item_ids = artifact["item_ids"].astype(np.int64, copy=True) self.packed = artifact["packed_eligible"].astype(np.uint8, copy=True) self.uid_row = {int(uid): row for row, uid in enumerate(self.uids)} self.item_column = { int(item): column for column, item in enumerate(self.item_ids) } def is_eligible(self, uid: int, item_id: int) -> bool: """Return whether ``item_id`` is eligible for ``uid``. IDs absent from the target-user or candidate-item arrays are treated as ineligible rather than raising an exception. Args: uid: Target user ID to query. item_id: Candidate item ID to query. Returns: ``True`` only when the corresponding packed eligibility bit is set. """ row = self.uid_row.get(int(uid)) column = self.item_column.get(int(item_id)) if row is None or column is None: return False byte, bit = divmod(column, 8) return bool((int(self.packed[row, byte]) >> bit) & 1) def read_ranking(path: Path) -> pd.DataFrame: """Read a parquet or CSV ranking into a pandas frame. Args: path: Input path. A ``.parquet`` suffix selects parquet; every other suffix is interpreted as CSV. Returns: The ranking frame as loaded by pandas. """ return pd.read_parquet(path) if path.suffix == ".parquet" else pd.read_csv(path) def validate_ranking( frame: pd.DataFrame, targets: set[int], ) -> pd.DataFrame: """Normalize and validate the stage-independent ranking contract. Required values must be finite integers. The user set must exactly match ``targets``; every user must have 100 rows, distinct items, and each rank from 1 through 100 exactly once. Cutoff-specific candidate eligibility is intentionally left to the calling evaluator. Args: frame: Raw ranking frame. Extra columns are discarded from an internal copy; the caller's frame is not modified. targets: Exact set of target user IDs the ranking must cover. Returns: A normalized frame containing only the required ``int64`` columns. Raises: RankingValidationError: If the ranking violates the shared contract. """ required = list(REQUIRED_COLUMNS) if not all(column in frame for column in required): raise RankingValidationError(f"submission requires columns {required}") normalized = frame[required].copy() for column in required: numeric = pd.to_numeric(normalized[column], errors="coerce") values = numeric.to_numpy(dtype=float) if numeric.isna().any() or not np.isfinite(values).all(): raise RankingValidationError( f"submission {column} must be finite numeric values" ) if not np.equal(numeric, np.floor(numeric)).all(): raise RankingValidationError( f"submission {column} must contain integers" ) normalized[column] = numeric.astype(np.int64) submitted_users = set(map(int, normalized.uid.unique())) if submitted_users != targets: raise RankingValidationError( f"submission user set mismatch: missing={len(targets - submitted_users)} " f"extra={len(submitted_users - targets)}" ) counts = normalized.groupby("uid").size() if not (counts == TOP_N).all(): raise RankingValidationError( f"submission must contain exactly {TOP_N} rows for every target user" ) if normalized.duplicated(["uid", "item_id"]).any(): raise RankingValidationError( "submission contains duplicate (uid, item_id) pairs" ) valid_ranks = set(range(1, TOP_N + 1)) ranks_are_valid = normalized.groupby("uid")["rank"].apply( lambda values: set(map(int, values)) == valid_ranks ) if not ranks_are_valid.all(): raise RankingValidationError( f"each user must have every rank from 1 through {TOP_N} exactly once" ) return normalized def ranked_items(frame: pd.DataFrame) -> dict[int, list[int]]: """Convert a validated ranking frame to ordered items keyed by user. Args: frame: Frame that has passed :func:`validate_ranking`. Returns: A ``uid -> item IDs`` mapping ordered by ascending rank. """ ordered = frame.sort_values(["uid", "rank"]) return { int(uid): list(map(int, values)) for uid, values in ordered.groupby("uid").item_id } def ndcg_at_k(ranked: list[int], gold: dict[int, int], k: int) -> float: """Compute graded normalized discounted cumulative gain at ``k``. Relevance gain is ``2**grade - 1`` and the discount at one-based rank ``r`` is ``1 / log2(r + 1)``. Items absent from ``gold`` have grade zero. Args: ranked: Item IDs in predicted rank order. gold: Mapping from relevant item IDs to integer relevance grades. k: Maximum number of predicted positions to score. Returns: For a valid duplicate-free ranking, NDCG in ``[0, 1]``; returns ``0.0`` when the ideal gain is zero. """ gains = np.asarray([gold.get(item, 0) for item in ranked[:k]], dtype=np.float64) discounts = 1.0 / np.log2(np.arange(2, len(gains) + 2)) dcg = float(np.sum((np.power(2.0, gains) - 1.0) * discounts)) ideal = np.asarray(sorted(gold.values(), reverse=True)[:k], dtype=np.float64) ideal_discounts = 1.0 / np.log2(np.arange(2, len(ideal) + 2)) idcg = float(np.sum((np.power(2.0, ideal) - 1.0) * ideal_discounts)) return dcg / idcg if idcg else 0.0 def score_rankings( ranked: dict[int, list[int]], graded: dict[int, dict[int, int]], ) -> dict[str, float | int]: """Aggregate per-user NDCG@10 over users with relevance labels. Args: ranked: Ranked item IDs for every target user. graded: Relevant item grades keyed by user and item. Returns: The six-decimal ``quality_ndcg@10`` value and number of scored users. """ quality = float( np.mean( [ ndcg_at_k(ranked[uid], gold, QUALITY_K) for uid, gold in graded.items() ] ) ) return { "quality_ndcg@10": round(quality, 6), "quality_users": len(graded), } #!/usr/bin/env python3 """Score a validation-stage ranking against public discovery labels. ``build_task.py`` publishes this module with the solver-visible task files. It loads target users, validation eligibility, and validation-window events from the adjacent ``data`` directory, then evaluates one ranking supplied on the command line. Stage-independent mechanics come from the adjacent public ``ranking_evaluation.py`` module. The builder installs the same checked-in module in the private judge, so public and private scoring mechanics cannot drift. A relevant candidate receives grade 3 for an organic like or grade 1 for an organic listen with at least 80 percent completion; a like takes precedence when both events exist. Before scoring, the ranking must contain exactly 100 distinct eligible items for every target user, with integer-valued ``uid``, ``item_id``, and ``rank`` columns and ranks 1 through 100 exactly once per user. Extra columns are ignored. Quality is graded NDCG@10, averaged only over users who have at least one eligible relevant item in the validation window. The evaluator prints a JSON object containing the model path and scores. It does not apply the task's pass threshold; its purpose is model development and selection. The private judge applies the threshold to the final submission. Usage:: python evaluate_public.py """ from __future__ import annotations import json import sys from pathlib import Path import pandas as pd from ranking_evaluation import ( CandidateSet, RankingValidationError, ranked_items, read_ranking, score_rankings, validate_ranking, ) HERE = Path(__file__).resolve().parent DATA = HERE / "data" LISTEN_STRONG = 80 def validation_truth( eligibility: CandidateSet, targets: set[int] ) -> dict[int, dict[int, int]]: """Build cutoff-correct graded relevance from public validation events. Only target-user events for eligible candidates are retained. Organic listens completed to at least 80 percent receive grade 1, and organic likes receive grade 3. Repeated user-item events are collapsed, and processing likes second ensures that grade 3 wins over grade 1. Args: eligibility: Validation-cutoff candidate membership service. targets: Complete set of target user IDs. Returns: A nested ``uid -> item_id -> grade`` mapping. Users without an eligible relevant event are omitted. """ listens = pd.read_parquet(DATA / "val_listens.parquet") likes = pd.read_parquet(DATA / "val_likes.parquet") strong = listens[ listens.uid.isin(targets) & (listens.is_organic == 1) & (listens.played_ratio_pct >= LISTEN_STRONG) ][["uid", "item_id"]].drop_duplicates() organic_likes = likes[ likes.uid.isin(targets) & (likes.is_organic == 1) ][["uid", "item_id"]].drop_duplicates() graded: dict[int, dict[int, int]] = {} for raw_uid, raw_item in strong.itertuples(index=False, name=None): uid, item = int(raw_uid), int(raw_item) if eligibility.is_eligible(uid, item): graded.setdefault(uid, {})[item] = 1 for raw_uid, raw_item in organic_likes.itertuples(index=False, name=None): uid, item = int(raw_uid), int(raw_item) if eligibility.is_eligible(uid, item): graded.setdefault(uid, {})[item] = 3 return graded def load_submission( path: Path, eligibility: CandidateSet, targets: set[int] ) -> dict[int, list[int]]: """Load and validate a public validation ranking. Files ending in ``.parquet`` are read as parquet; every other suffix is read as CSV. The required columns must be integer-valued, cover exactly the target-user set, contain 100 rows and ranks 1 through 100 per user, avoid duplicate user-item pairs, and contain only cutoff-eligible items. Args: path: Ranking file to read. eligibility: Validation-cutoff candidate membership service. targets: Exact set of users the ranking must cover. Returns: A ``uid -> ranked item IDs`` mapping ordered by ascending rank. Raises: ValueError: If the ranking violates the required schema or invariants. """ frame = validate_ranking(read_ranking(path), targets) if not all( eligibility.is_eligible(uid, item) for uid, item in frame[["uid", "item_id"]].itertuples(index=False, name=None) ): raise RankingValidationError( "submission contains an item rejected by eligibility service" ) return ranked_items(frame) def score( ranked: dict[int, list[int]], graded: dict[int, dict[int, int]], ) -> dict[str, float | int]: """Aggregate per-user NDCG@10 over users with public relevance labels. Args: ranked: Ranked item IDs for every target user. graded: Eligible validation relevance keyed by user and item. Returns: The six-decimal ``quality_ndcg@10`` value and number of scored users. """ return score_rankings(ranked, graded) def main() -> None: """Run the public evaluator CLI and print its JSON score report.""" targets_frame = pd.read_parquet(DATA / "target_users.parquet") targets = set(targets_frame.uid.astype(int)) eligibility = CandidateSet(DATA / "validation_eligible_candidates.npz") graded = validation_truth(eligibility, targets) if len(sys.argv) != 2: raise SystemExit( "usage: evaluate_public.py " ) path = Path(sys.argv[1]) ranked = load_submission(path, eligibility, targets) print(json.dumps({"model": str(path), "scores": score(ranked, graded)}, indent=2)) if __name__ == "__main__": main() ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd1ca7bf487d183f1a1a667ca6863", "usage": { "input_tokens": 14590, "cached_input_tokens": 14464, "cache_write_input_tokens": 0, "output_tokens": 185, "reasoning_output_tokens": 24, "total_tokens": 14775 }, "turn_token_usage": { "input_tokens": 14590, "cached_input_tokens": 14464, "cache_write_input_tokens": 0, "output_tokens": 185, "reasoning_output_tokens": 24, "total_tokens": 14775 }, "thread_token_usage": { "input_tokens": 14590, "cached_input_tokens": 14464, "cache_write_input_tokens": 0, "output_tokens": 185, "reasoning_output_tokens": 24, "total_tokens": 14775 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-7d0e4760-9059-45d4-b34e-070eda65d5fb", "process_id": "43510", "command": [ "/bin/sh", "-lc", "ls -lah /task/data && sed -n '1,220p' /task/requirements.txt && sed -n '1,260p' /task/ranking_evaluation.py && sed -n '1,220p' /task/evaluate_public.py" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "list_files", "cmd": "ls -lah /task/data", "path": "data" }, { "type": "read", "cmd": "sed -n '1,220p' /task/requirements.txt", "name": "requirements.txt", "path": "/task/requirements.txt" }, { "type": "read", "cmd": "sed -n '1,260p' /task/ranking_evaluation.py", "name": "ranking_evaluation.py", "path": "/task/ranking_evaluation.py" }, { "type": "read", "cmd": "sed -n '1,220p' /task/evaluate_public.py", "name": "evaluate_public.py", "path": "/task/evaluate_public.py" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "total 340M\ndr-xr-xr-x 1 root root 4.0K Sep 18 23:49 .\ndr-xr-xr-x 1 root root 4.0K Sep 19 00:02 ..\n-r--r--r-- 1 root root 342K Sep 18 23:48 candidate_catalog.parquet\n-r--r--r-- 1 root root 83K Sep 18 23:48 target_users.parquet\n-r--r--r-- 1 root root 7.4M Sep 18 23:48 test_eligible_candidates.npz\n-r--r--r-- 1 root root 1.1M Sep 18 23:49 test_preference_state.parquet\n-r--r--r-- 1 root root 838K Sep 18 23:48 train_dislikes.parquet\n-r--r--r-- 1 root root 5.2M Sep 18 23:48 train_likes.parquet\n-r--r--r-- 1 root root 305M Sep 18 23:48 train_listens.parquet\n-r--r--r-- 1 root root 153K Sep 18 23:48 train_undislikes.parquet\n-r--r--r-- 1 root root 1.8M Sep 18 23:48 train_unlikes.parquet\n-r--r--r-- 1 root root 36K Sep 18 23:48 val_dislikes.parquet\n-r--r--r-- 1 root root 292K Sep 18 23:48 val_likes.parquet\n-r--r--r-- 1 root root 9.5M Sep 18 23:48 val_listens.parquet\n-r--r--r-- 1 root root 7.7K Sep 18 23:48 val_undislikes.parquet\n-r--r--r-- 1 root root 71K Sep 18 23:48 val_unlikes.parquet\n-r--r--r-- 1 root root 7.3M Sep 18 23:48 validation_eligible_candidates.npz\n-r--r--r-- 1 root root 1.1M Sep 18 23:49 validation_preference_state.parquet\n# Exact distribution inventory for the Yambda two-tower task family.\n#\n# This is an input to `uv pip sync`, not a list of minimum requirements. A\n# conforming task environment contains exactly these third-party Python\n# distributions and no others. Python itself is pinned by task.toml and both\n# Harbor image Dockerfiles.\nattrs==26.1.0\nbleach==6.4.0\ncertifi==2026.7.22\nchardet==7.6.0\ncharset-normalizer==3.5.1\nfastjsonschema==2.22.2\nfilelock==3.32.3\nfsspec==2026.7.0\nidna==3.18\nJinja2==3.1.6\njoblib==1.5.3\njsonschema==4.26.0\njsonschema-specifications==2025.9.1\njupyter-core==5.9.1\njupytext==1.19.5\nkaggle==2.2.4\nkagglesdk==0.1.37\nmarkdown-it-py==4.2.0\nMarkupSafe==3.0.3\nmdit-py-plugins==0.6.1\nmdurl==0.1.2\nmpmath==1.3.0\nnbformat==5.11.1\nnetworkx==3.6.1\nnumpy==2.2.6\npackaging==26.3\npandas==2.3.3\npillow==12.3.0\npip==26.0.1\nplatformdirs==4.11.3\nprotobuf==7.35.1\npyarrow==18.1.0\npython-dateutil==2.9.0.post0\npython-dotenv==1.2.3\npython-slugify==8.0.4\npytz==2026.3.post1\nPyYAML==6.0.3\nreferencing==0.37.0\nreportlab==4.2.5\nrequests==2.34.2\nrpds-py==2026.6.3\nscikit-learn==1.7.2\nscipy==1.15.3\nsetuptools==84.0.0\nsix==1.17.0\nsympy==1.14.0\ntext-unidecode==1.3\nthreadpoolctl==3.6.0\ntorch==2.8.0\ntqdm==4.70.0\ntraitlets==5.16.1\ntyping-extensions==4.16.0\ntzdata==2026.3\nurllib3==2.7.0\nwebencodings==0.6.1\n\"\"\"Shared public primitives for Yambda discovery-ranking evaluation.\n\nBoth the solver-visible validation evaluator and the private submission judge\nimport this module from the generated task's ``public`` directory. It owns the\nstage-independent contract: reading a ranking, validating its shape, converting\nit to per-user rank order, looking up packed candidate eligibility, and\ncomputing graded NDCG@10.\n\nThe module deliberately contains no event-derived labels, private artifact\npaths, or pass thresholds. Each evaluator supplies its own relevance data and\nper-cutoff eligibility checks around these common operations.\n\"\"\"\nfrom __future__ import annotations\n\nfrom pathlib import Path\n\nimport numpy as np\nimport pandas as pd\n\n\n__all__ = [\n \"CandidateSet\",\n \"QUALITY_K\",\n \"RankingValidationError\",\n \"REQUIRED_COLUMNS\",\n \"TOP_N\",\n \"ndcg_at_k\",\n \"ranked_items\",\n \"read_ranking\",\n \"score_rankings\",\n \"validate_ranking\",\n]\n\nTOP_N = 100\nQUALITY_K = 10\nREQUIRED_COLUMNS = (\"uid\", \"item_id\", \"rank\")\n\n\nclass RankingValidationError(ValueError):\n \"\"\"Report a ranking-schema or structural-contract violation.\"\"\"\n\n\nclass CandidateSet:\n \"\"\"Provide membership lookups over one packed candidate-set archive.\n\n The archive contains aligned ``uids``, ``item_ids``, and\n ``packed_eligible`` arrays. Candidate column ``c`` is represented by bit\n ``c % 8`` of byte ``c // 8`` using little-endian bit order. Arrays are\n copied into memory so they remain valid after the archive is closed.\n \"\"\"\n\n def __init__(self, path: Path):\n \"\"\"Load an eligibility archive and build ID-to-position indexes.\n\n Args:\n path: Path to a ``.npz`` archive with the candidate-set schema.\n \"\"\"\n with np.load(path, allow_pickle=False) as artifact:\n self.uids = artifact[\"uids\"].astype(np.int64, copy=True)\n self.item_ids = artifact[\"item_ids\"].astype(np.int64, copy=True)\n self.packed = artifact[\"packed_eligible\"].astype(np.uint8, copy=True)\n self.uid_row = {int(uid): row for row, uid in enumerate(self.uids)}\n self.item_column = {\n int(item): column for column, item in enumerate(self.item_ids)\n }\n\n def is_eligible(self, uid: int, item_id: int) -> bool:\n \"\"\"Return whether ``item_id`` is eligible for ``uid``.\n\n IDs absent from the target-user or candidate-item arrays are treated as\n ineligible rather than raising an exception.\n\n Args:\n uid: Target user ID to query.\n item_id: Candidate item ID to query.\n\n Returns:\n ``True`` only when the corresponding packed eligibility bit is set.\n \"\"\"\n row = self.uid_row.get(int(uid))\n column = self.item_column.get(int(item_id))\n if row is None or column is None:\n return False\n byte, bit = divmod(column, 8)\n return bool((int(self.packed[row, byte]) >> bit) & 1)\n\n\ndef read_ranking(path: Path) -> pd.DataFrame:\n \"\"\"Read a parquet or CSV ranking into a pandas frame.\n\n Args:\n path: Input path. A ``.parquet`` suffix selects parquet; every other\n suffix is interpreted as CSV.\n\n Returns:\n The ranking frame as loaded by pandas.\n \"\"\"\n return pd.read_parquet(path) if path.suffix == \".parquet\" else pd.read_csv(path)\n\n\ndef validate_ranking(\n frame: pd.DataFrame,\n targets: set[int],\n) -> pd.DataFrame:\n \"\"\"Normalize and validate the stage-independent ranking contract.\n\n Required values must be finite integers. The user set must exactly match\n ``targets``; every user must have 100 rows, distinct items, and each rank\n from 1 through 100 exactly once. Cutoff-specific candidate eligibility is\n intentionally left to the calling evaluator.\n\n Args:\n frame: Raw ranking frame. Extra columns are discarded from an internal\n copy; the caller's frame is not modified.\n targets: Exact set of target user IDs the ranking must cover.\n\n Returns:\n A normalized frame containing only the required ``int64`` columns.\n\n Raises:\n RankingValidationError: If the ranking violates the shared contract.\n \"\"\"\n required = list(REQUIRED_COLUMNS)\n if not all(column in frame for column in required):\n raise RankingValidationError(f\"submission requires columns {required}\")\n\n normalized = frame[required].copy()\n for column in required:\n numeric = pd.to_numeric(normalized[column], errors=\"coerce\")\n values = numeric.to_numpy(dtype=float)\n if numeric.isna().any() or not np.isfinite(values).all():\n raise RankingValidationError(\n f\"submission {column} must be finite numeric values\"\n )\n if not np.equal(numeric, np.floor(numeric)).all():\n raise RankingValidationError(\n f\"submission {column} must contain integers\"\n )\n normalized[column] = numeric.astype(np.int64)\n\n submitted_users = set(map(int, normalized.uid.unique()))\n if submitted_users != targets:\n raise RankingValidationError(\n f\"submission user set mismatch: missing={len(targets - submitted_users)} \"\n f\"extra={len(submitted_users - targets)}\"\n )\n counts = normalized.groupby(\"uid\").size()\n if not (counts == TOP_N).all():\n raise RankingValidationError(\n f\"submission must contain exactly {TOP_N} rows for every target user\"\n )\n if normalized.duplicated([\"uid\", \"item_id\"]).any():\n raise RankingValidationError(\n \"submission contains duplicate (uid, item_id) pairs\"\n )\n valid_ranks = set(range(1, TOP_N + 1))\n ranks_are_valid = normalized.groupby(\"uid\")[\"rank\"].apply(\n lambda values: set(map(int, values)) == valid_ranks\n )\n if not ranks_are_valid.all():\n raise RankingValidationError(\n f\"each user must have every rank from 1 through {TOP_N} exactly once\"\n )\n return normalized\n\n\ndef ranked_items(frame: pd.DataFrame) -> dict[int, list[int]]:\n \"\"\"Convert a validated ranking frame to ordered items keyed by user.\n\n Args:\n frame: Frame that has passed :func:`validate_ranking`.\n\n Returns:\n A ``uid -> item IDs`` mapping ordered by ascending rank.\n \"\"\"\n ordered = frame.sort_values([\"uid\", \"rank\"])\n return {\n int(uid): list(map(int, values))\n for uid, values in ordered.groupby(\"uid\").item_id\n }\n\n\ndef ndcg_at_k(ranked: list[int], gold: dict[int, int], k: int) -> float:\n \"\"\"Compute graded normalized discounted cumulative gain at ``k``.\n\n Relevance gain is ``2**grade - 1`` and the discount at one-based rank\n ``r`` is ``1 / log2(r + 1)``. Items absent from ``gold`` have grade zero.\n\n Args:\n ranked: Item IDs in predicted rank order.\n gold: Mapping from relevant item IDs to integer relevance grades.\n k: Maximum number of predicted positions to score.\n\n Returns:\n For a valid duplicate-free ranking, NDCG in ``[0, 1]``; returns\n ``0.0`` when the ideal gain is zero.\n \"\"\"\n gains = np.asarray([gold.get(item, 0) for item in ranked[:k]], dtype=np.float64)\n discounts = 1.0 / np.log2(np.arange(2, len(gains) + 2))\n dcg = float(np.sum((np.power(2.0, gains) - 1.0) * discounts))\n ideal = np.asarray(sorted(gold.values(), reverse=True)[:k], dtype=np.float64)\n ideal_discounts = 1.0 / np.log2(np.arange(2, len(ideal) + 2))\n idcg = float(np.sum((np.power(2.0, ideal) - 1.0) * ideal_discounts))\n return dcg / idcg if idcg else 0.0\n\n\ndef score_rankings(\n ranked: dict[int, list[int]],\n graded: dict[int, dict[int, int]],\n) -> dict[str, float | int]:\n \"\"\"Aggregate per-user NDCG@10 over users with relevance labels.\n\n Args:\n ranked: Ranked item IDs for every target user.\n graded: Relevant item grades keyed by user and item.\n\n Returns:\n The six-decimal ``quality_ndcg@10`` value and number of scored users.\n \"\"\"\n quality = float(\n np.mean(\n [\n ndcg_at_k(ranked[uid], gold, QUALITY_K)\n for uid, gold in graded.items()\n ]\n )\n )\n return {\n \"quality_ndcg@10\": round(quality, 6),\n \"quality_users\": len(graded),\n }\n#!/usr/bin/env python3\n\"\"\"Score a validation-stage ranking against public discovery labels.\n\n``build_task.py`` publishes this module with the solver-visible task files. It\nloads target users, validation eligibility, and validation-window events from\nthe adjacent ``data`` directory, then evaluates one ranking supplied on the\ncommand line. Stage-independent mechanics come from the adjacent public\n``ranking_evaluation.py`` module. The builder installs the same checked-in\nmodule in the private judge, so public and private scoring mechanics cannot\ndrift. A relevant candidate receives grade 3 for an organic like or grade 1 for\nan organic listen with at least 80 percent completion; a like takes precedence\nwhen both events exist.\n\nBefore scoring, the ranking must contain exactly 100 distinct eligible items\nfor every target user, with integer-valued ``uid``, ``item_id``, and ``rank``\ncolumns and ranks 1 through 100 exactly once per user. Extra columns are\nignored. Quality is graded NDCG@10, averaged only over users who have at least\none eligible relevant item in the validation window.\n\nThe evaluator prints a JSON object containing the model path and scores. It\ndoes not apply the task's pass threshold; its purpose is model development and\nselection. The private judge applies the threshold to the final submission.\n\nUsage::\n\n python evaluate_public.py \n\"\"\"\nfrom __future__ import annotations\n\nimport json\nimport sys\nfrom pathlib import Path\n\nimport pandas as pd\n\nfrom ranking_evaluation import (\n CandidateSet,\n RankingValidationError,\n ranked_items,\n read_ranking,\n score_rankings,\n validate_ranking,\n)\n\n\nHERE = Path(__file__).resolve().parent\nDATA = HERE / \"data\"\nLISTEN_STRONG = 80\n\n\ndef validation_truth(\n eligibility: CandidateSet, targets: set[int]\n) -> dict[int, dict[int, int]]:\n \"\"\"Build cutoff-correct graded relevance from public validation events.\n\n Only target-user events for eligible candidates are retained. Organic\n listens completed to at least 80 percent receive grade 1, and organic likes\n receive grade 3. Repeated user-item events are collapsed, and processing\n likes second ensures that grade 3 wins over grade 1.\n\n Args:\n eligibility: Validation-cutoff candidate membership service.\n targets: Complete set of target user IDs.\n\n Returns:\n A nested ``uid -> item_id -> grade`` mapping. Users without an eligible\n relevant event are omitted.\n \"\"\"\n listens = pd.read_parquet(DATA / \"val_listens.parquet\")\n likes = pd.read_parquet(DATA / \"val_likes.parquet\")\n strong = listens[\n listens.uid.isin(targets)\n & (listens.is_organic == 1)\n & (listens.played_ratio_pct >= LISTEN_STRONG)\n ][[\"uid\", \"item_id\"]].drop_duplicates()\n organic_likes = likes[\n likes.uid.isin(targets) & (likes.is_organic == 1)\n ][[\"uid\", \"item_id\"]].drop_duplicates()\n\n graded: dict[int, dict[int, int]] = {}\n for raw_uid, raw_item in strong.itertuples(index=False, name=None):\n uid, item = int(raw_uid), int(raw_item)\n if eligibility.is_eligible(uid, item):\n graded.setdefault(uid, {})[item] = 1\n for raw_uid, raw_item in organic_likes.itertuples(index=False, name=None):\n uid, item = int(raw_uid), int(raw_item)\n if eligibility.is_eligible(uid, item):\n graded.setdefault(uid, {})[item] = 3\n return graded\n\n\ndef load_submission(\n path: Path, eligibility: CandidateSet, targets: set[int]\n) -> dict[int, list[int]]:\n \"\"\"Load and validate a public validation ranking.\n\n Files ending in ``.parquet`` are read as parquet; every other suffix is\n read as CSV. The required columns must be integer-valued, cover exactly the\n target-user set, contain 100 rows and ranks 1 through 100 per user, avoid\n duplicate user-item pairs, and contain only cutoff-eligible items.\n\n Args:\n path: Ranking file to read.\n eligibility: Validation-cutoff candidate membership service.\n targets: Exact set of users the ranking must cover.\n\n Returns:\n A ``uid -> ranked item IDs`` mapping ordered by ascending rank.\n\n Raises:\n ValueError: If the ranking violates the required schema or invariants.\n \"\"\"\n frame = validate_ranking(read_ranking(path), targets)\n if not all(\n eligibility.is_eligible(uid, item)\n for uid, item in frame[[\"uid\", \"item_id\"]].itertuples(index=False, name=None)\n ):\n raise RankingValidationError(\n \"submission contains an item rejected by eligibility service\"\n )\n return ranked_items(frame)\n\n\ndef score(\n ranked: dict[int, list[int]],\n graded: dict[int, dict[int, int]],\n) -> dict[str, float | int]:\n \"\"\"Aggregate per-user NDCG@10 over users with public relevance labels.\n\n Args:\n ranked: Ranked item IDs for every target user.\n graded: Eligible validation relevance keyed by user and item.\n\n Returns:\n The six-decimal ``quality_ndcg@10`` value and number of scored users.\n \"\"\"\n return score_rankings(ranked, graded)\n\n\ndef main() -> None:\n \"\"\"Run the public evaluator CLI and print its JSON score report.\"\"\"\n targets_frame = pd.read_parquet(DATA / \"target_users.parquet\")\n targets = set(targets_frame.uid.astype(int))\n eligibility = CandidateSet(DATA / \"validation_eligible_candidates.npz\")\n graded = validation_truth(eligibility, targets)\n\n if len(sys.argv) != 2:\n raise SystemExit(\n \"usage: evaluate_public.py \"\n )\n path = Path(sys.argv[1])\n ranked = load_submission(path, eligibility, targets)\n print(json.dumps({\"model\": str(path), \"scores\": score(ranked, graded)}, indent=2))\n\n\nif __name__ == \"__main__\":\n main()\n", "stderr": "", "aggregated_output": "total 340M\ndr-xr-xr-x 1 root root 4.0K Sep 18 23:49 .\ndr-xr-xr-x 1 root root 4.0K Sep 19 00:02 ..\n-r--r--r-- 1 root root 342K Sep 18 23:48 candidate_catalog.parquet\n-r--r--r-- 1 root root 83K Sep 18 23:48 target_users.parquet\n-r--r--r-- 1 root root 7.4M Sep 18 23:48 test_eligible_candidates.npz\n-r--r--r-- 1 root root 1.1M Sep 18 23:49 test_preference_state.parquet\n-r--r--r-- 1 root root 838K Sep 18 23:48 train_dislikes.parquet\n-r--r--r-- 1 root root 5.2M Sep 18 23:48 train_likes.parquet\n-r--r--r-- 1 root root 305M Sep 18 23:48 train_listens.parquet\n-r--r--r-- 1 root root 153K Sep 18 23:48 train_undislikes.parquet\n-r--r--r-- 1 root root 1.8M Sep 18 23:48 train_unlikes.parquet\n-r--r--r-- 1 root root 36K Sep 18 23:48 val_dislikes.parquet\n-r--r--r-- 1 root root 292K Sep 18 23:48 val_likes.parquet\n-r--r--r-- 1 root root 9.5M Sep 18 23:48 val_listens.parquet\n-r--r--r-- 1 root root 7.7K Sep 18 23:48 val_undislikes.parquet\n-r--r--r-- 1 root root 71K Sep 18 23:48 val_unlikes.parquet\n-r--r--r-- 1 root root 7.3M Sep 18 23:48 validation_eligible_candidates.npz\n-r--r--r-- 1 root root 1.1M Sep 18 23:49 validation_preference_state.parquet\n# Exact distribution inventory for the Yambda two-tower task family.\n#\n# This is an input to `uv pip sync`, not a list of minimum requirements. A\n# conforming task environment contains exactly these third-party Python\n# distributions and no others. Python itself is pinned by task.toml and both\n# Harbor image Dockerfiles.\nattrs==26.1.0\nbleach==6.4.0\ncertifi==2026.7.22\nchardet==7.6.0\ncharset-normalizer==3.5.1\nfastjsonschema==2.22.2\nfilelock==3.32.3\nfsspec==2026.7.0\nidna==3.18\nJinja2==3.1.6\njoblib==1.5.3\njsonschema==4.26.0\njsonschema-specifications==2025.9.1\njupyter-core==5.9.1\njupytext==1.19.5\nkaggle==2.2.4\nkagglesdk==0.1.37\nmarkdown-it-py==4.2.0\nMarkupSafe==3.0.3\nmdit-py-plugins==0.6.1\nmdurl==0.1.2\nmpmath==1.3.0\nnbformat==5.11.1\nnetworkx==3.6.1\nnumpy==2.2.6\npackaging==26.3\npandas==2.3.3\npillow==12.3.0\npip==26.0.1\nplatformdirs==4.11.3\nprotobuf==7.35.1\npyarrow==18.1.0\npython-dateutil==2.9.0.post0\npython-dotenv==1.2.3\npython-slugify==8.0.4\npytz==2026.3.post1\nPyYAML==6.0.3\nreferencing==0.37.0\nreportlab==4.2.5\nrequests==2.34.2\nrpds-py==2026.6.3\nscikit-learn==1.7.2\nscipy==1.15.3\nsetuptools==84.0.0\nsix==1.17.0\nsympy==1.14.0\ntext-unidecode==1.3\nthreadpoolctl==3.6.0\ntorch==2.8.0\ntqdm==4.70.0\ntraitlets==5.16.1\ntyping-extensions==4.16.0\ntzdata==2026.3\nurllib3==2.7.0\nwebencodings==0.6.1\n\"\"\"Shared public primitives for Yambda discovery-ranking evaluation.\n\nBoth the solver-visible validation evaluator and the private submission judge\nimport this module from the generated task's ``public`` directory. It owns the\nstage-independent contract: reading a ranking, validating its shape, converting\nit to per-user rank order, looking up packed candidate eligibility, and\ncomputing graded NDCG@10.\n\nThe module deliberately contains no event-derived labels, private artifact\npaths, or pass thresholds. Each evaluator supplies its own relevance data and\nper-cutoff eligibility checks around these common operations.\n\"\"\"\nfrom __future__ import annotations\n\nfrom pathlib import Path\n\nimport numpy as np\nimport pandas as pd\n\n\n__all__ = [\n \"CandidateSet\",\n \"QUALITY_K\",\n \"RankingValidationError\",\n \"REQUIRED_COLUMNS\",\n \"TOP_N\",\n \"ndcg_at_k\",\n \"ranked_items\",\n \"read_ranking\",\n \"score_rankings\",\n \"validate_ranking\",\n]\n\nTOP_N = 100\nQUALITY_K = 10\nREQUIRED_COLUMNS = (\"uid\", \"item_id\", \"rank\")\n\n\nclass RankingValidationError(ValueError):\n \"\"\"Report a ranking-schema or structural-contract violation.\"\"\"\n\n\nclass CandidateSet:\n \"\"\"Provide membership lookups over one packed candidate-set archive.\n\n The archive contains aligned ``uids``, ``item_ids``, and\n ``packed_eligible`` arrays. Candidate column ``c`` is represented by bit\n ``c % 8`` of byte ``c // 8`` using little-endian bit order. Arrays are\n copied into memory so they remain valid after the archive is closed.\n \"\"\"\n\n def __init__(self, path: Path):\n \"\"\"Load an eligibility archive and build ID-to-position indexes.\n\n Args:\n path: Path to a ``.npz`` archive with the candidate-set schema.\n \"\"\"\n with np.load(path, allow_pickle=False) as artifact:\n self.uids = artifact[\"uids\"].astype(np.int64, copy=True)\n self.item_ids = artifact[\"item_ids\"].astype(np.int64, copy=True)\n self.packed = artifact[\"packed_eligible\"].astype(np.uint8, copy=True)\n self.uid_row = {int(uid): row for row, uid in enumerate(self.uids)}\n self.item_column = {\n int(item): column for column, item in enumerate(self.item_ids)\n }\n\n def is_eligible(self, uid: int, item_id: int) -> bool:\n \"\"\"Return whether ``item_id`` is eligible for ``uid``.\n\n IDs absent from the target-user or candidate-item arrays are treated as\n ineligible rather than raising an exception.\n\n Args:\n uid: Target user ID to query.\n item_id: Candidate item ID to query.\n\n Returns:\n ``True`` only when the corresponding packed eligibility bit is set.\n \"\"\"\n row = self.uid_row.get(int(uid))\n column = self.item_column.get(int(item_id))\n if row is None or column is None:\n return False\n byte, bit = divmod(column, 8)\n return bool((int(self.packed[row, byte]) >> bit) & 1)\n\n\ndef read_ranking(path: Path) -> pd.DataFrame:\n \"\"\"Read a parquet or CSV ranking into a pandas frame.\n\n Args:\n path: Input path. A ``.parquet`` suffix selects parquet; every other\n suffix is interpreted as CSV.\n\n Returns:\n The ranking frame as loaded by pandas.\n \"\"\"\n return pd.read_parquet(path) if path.suffix == \".parquet\" else pd.read_csv(path)\n\n\ndef validate_ranking(\n frame: pd.DataFrame,\n targets: set[int],\n) -> pd.DataFrame:\n \"\"\"Normalize and validate the stage-independent ranking contract.\n\n Required values must be finite integers. The user set must exactly match\n ``targets``; every user must have 100 rows, distinct items, and each rank\n from 1 through 100 exactly once. Cutoff-specific candidate eligibility is\n intentionally left to the calling evaluator.\n\n Args:\n frame: Raw ranking frame. Extra columns are discarded from an internal\n copy; the caller's frame is not modified.\n targets: Exact set of target user IDs the ranking must cover.\n\n Returns:\n A normalized frame containing only the required ``int64`` columns.\n\n Raises:\n RankingValidationError: If the ranking violates the shared contract.\n \"\"\"\n required = list(REQUIRED_COLUMNS)\n if not all(column in frame for column in required):\n raise RankingValidationError(f\"submission requires columns {required}\")\n\n normalized = frame[required].copy()\n for column in required:\n numeric = pd.to_numeric(normalized[column], errors=\"coerce\")\n values = numeric.to_numpy(dtype=float)\n if numeric.isna().any() or not np.isfinite(values).all():\n raise RankingValidationError(\n f\"submission {column} must be finite numeric values\"\n )\n if not np.equal(numeric, np.floor(numeric)).all():\n raise RankingValidationError(\n f\"submission {column} must contain integers\"\n )\n normalized[column] = numeric.astype(np.int64)\n\n submitted_users = set(map(int, normalized.uid.unique()))\n if submitted_users != targets:\n raise RankingValidationError(\n f\"submission user set mismatch: missing={len(targets - submitted_users)} \"\n f\"extra={len(submitted_users - targets)}\"\n )\n counts = normalized.groupby(\"uid\").size()\n if not (counts == TOP_N).all():\n raise RankingValidationError(\n f\"submission must contain exactly {TOP_N} rows for every target user\"\n )\n if normalized.duplicated([\"uid\", \"item_id\"]).any():\n raise RankingValidationError(\n \"submission contains duplicate (uid, item_id) pairs\"\n )\n valid_ranks = set(range(1, TOP_N + 1))\n ranks_are_valid = normalized.groupby(\"uid\")[\"rank\"].apply(\n lambda values: set(map(int, values)) == valid_ranks\n )\n if not ranks_are_valid.all():\n raise RankingValidationError(\n f\"each user must have every rank from 1 through {TOP_N} exactly once\"\n )\n return normalized\n\n\ndef ranked_items(frame: pd.DataFrame) -> dict[int, list[int]]:\n \"\"\"Convert a validated ranking frame to ordered items keyed by user.\n\n Args:\n frame: Frame that has passed :func:`validate_ranking`.\n\n Returns:\n A ``uid -> item IDs`` mapping ordered by ascending rank.\n \"\"\"\n ordered = frame.sort_values([\"uid\", \"rank\"])\n return {\n int(uid): list(map(int, values))\n for uid, values in ordered.groupby(\"uid\").item_id\n }\n\n\ndef ndcg_at_k(ranked: list[int], gold: dict[int, int], k: int) -> float:\n \"\"\"Compute graded normalized discounted cumulative gain at ``k``.\n\n Relevance gain is ``2**grade - 1`` and the discount at one-based rank\n ``r`` is ``1 / log2(r + 1)``. Items absent from ``gold`` have grade zero.\n\n Args:\n ranked: Item IDs in predicted rank order.\n gold: Mapping from relevant item IDs to integer relevance grades.\n k: Maximum number of predicted positions to score.\n\n Returns:\n For a valid duplicate-free ranking, NDCG in ``[0, 1]``; returns\n ``0.0`` when the ideal gain is zero.\n \"\"\"\n gains = np.asarray([gold.get(item, 0) for item in ranked[:k]], dtype=np.float64)\n discounts = 1.0 / np.log2(np.arange(2, len(gains) + 2))\n dcg = float(np.sum((np.power(2.0, gains) - 1.0) * discounts))\n ideal = np.asarray(sorted(gold.values(), reverse=True)[:k], dtype=np.float64)\n ideal_discounts = 1.0 / np.log2(np.arange(2, len(ideal) + 2))\n idcg = float(np.sum((np.power(2.0, ideal) - 1.0) * ideal_discounts))\n return dcg / idcg if idcg else 0.0\n\n\ndef score_rankings(\n ranked: dict[int, list[int]],\n graded: dict[int, dict[int, int]],\n) -> dict[str, float | int]:\n \"\"\"Aggregate per-user NDCG@10 over users with relevance labels.\n\n Args:\n ranked: Ranked item IDs for every target user.\n graded: Relevant item grades keyed by user and item.\n\n Returns:\n The six-decimal ``quality_ndcg@10`` value and number of scored users.\n \"\"\"\n quality = float(\n np.mean(\n [\n ndcg_at_k(ranked[uid], gold, QUALITY_K)\n for uid, gold in graded.items()\n ]\n )\n )\n return {\n \"quality_ndcg@10\": round(quality, 6),\n \"quality_users\": len(graded),\n }\n#!/usr/bin/env python3\n\"\"\"Score a validation-stage ranking against public discovery labels.\n\n``build_task.py`` publishes this module with the solver-visible task files. It\nloads target users, validation eligibility, and validation-window events from\nthe adjacent ``data`` directory, then evaluates one ranking supplied on the\ncommand line. Stage-independent mechanics come from the adjacent public\n``ranking_evaluation.py`` module. The builder installs the same checked-in\nmodule in the private judge, so public and private scoring mechanics cannot\ndrift. A relevant candidate receives grade 3 for an organic like or grade 1 for\nan organic listen with at least 80 percent completion; a like takes precedence\nwhen both events exist.\n\nBefore scoring, the ranking must contain exactly 100 distinct eligible items\nfor every target user, with integer-valued ``uid``, ``item_id``, and ``rank``\ncolumns and ranks 1 through 100 exactly once per user. Extra columns are\nignored. Quality is graded NDCG@10, averaged only over users who have at least\none eligible relevant item in the validation window.\n\nThe evaluator prints a JSON object containing the model path and scores. It\ndoes not apply the task's pass threshold; its purpose is model development and\nselection. The private judge applies the threshold to the final submission.\n\nUsage::\n\n python evaluate_public.py \n\"\"\"\nfrom __future__ import annotations\n\nimport json\nimport sys\nfrom pathlib import Path\n\nimport pandas as pd\n\nfrom ranking_evaluation import (\n CandidateSet,\n RankingValidationError,\n ranked_items,\n read_ranking,\n score_rankings,\n validate_ranking,\n)\n\n\nHERE = Path(__file__).resolve().parent\nDATA = HERE / \"data\"\nLISTEN_STRONG = 80\n\n\ndef validation_truth(\n eligibility: CandidateSet, targets: set[int]\n) -> dict[int, dict[int, int]]:\n \"\"\"Build cutoff-correct graded relevance from public validation events.\n\n Only target-user events for eligible candidates are retained. Organic\n listens completed to at least 80 percent receive grade 1, and organic likes\n receive grade 3. Repeated user-item events are collapsed, and processing\n likes second ensures that grade 3 wins over grade 1.\n\n Args:\n eligibility: Validation-cutoff candidate membership service.\n targets: Complete set of target user IDs.\n\n Returns:\n A nested ``uid -> item_id -> grade`` mapping. Users without an eligible\n relevant event are omitted.\n \"\"\"\n listens = pd.read_parquet(DATA / \"val_listens.parquet\")\n likes = pd.read_parquet(DATA / \"val_likes.parquet\")\n strong = listens[\n listens.uid.isin(targets)\n & (listens.is_organic == 1)\n & (listens.played_ratio_pct >= LISTEN_STRONG)\n ][[\"uid\", \"item_id\"]].drop_duplicates()\n organic_likes = likes[\n likes.uid.isin(targets) & (likes.is_organic == 1)\n ][[\"uid\", \"item_id\"]].drop_duplicates()\n\n graded: dict[int, dict[int, int]] = {}\n for raw_uid, raw_item in strong.itertuples(index=False, name=None):\n uid, item = int(raw_uid), int(raw_item)\n if eligibility.is_eligible(uid, item):\n graded.setdefault(uid, {})[item] = 1\n for raw_uid, raw_item in organic_likes.itertuples(index=False, name=None):\n uid, item = int(raw_uid), int(raw_item)\n if eligibility.is_eligible(uid, item):\n graded.setdefault(uid, {})[item] = 3\n return graded\n\n\ndef load_submission(\n path: Path, eligibility: CandidateSet, targets: set[int]\n) -> dict[int, list[int]]:\n \"\"\"Load and validate a public validation ranking.\n\n Files ending in ``.parquet`` are read as parquet; every other suffix is\n read as CSV. The required columns must be integer-valued, cover exactly the\n target-user set, contain 100 rows and ranks 1 through 100 per user, avoid\n duplicate user-item pairs, and contain only cutoff-eligible items.\n\n Args:\n path: Ranking file to read.\n eligibility: Validation-cutoff candidate membership service.\n targets: Exact set of users the ranking must cover.\n\n Returns:\n A ``uid -> ranked item IDs`` mapping ordered by ascending rank.\n\n Raises:\n ValueError: If the ranking violates the required schema or invariants.\n \"\"\"\n frame = validate_ranking(read_ranking(path), targets)\n if not all(\n eligibility.is_eligible(uid, item)\n for uid, item in frame[[\"uid\", \"item_id\"]].itertuples(index=False, name=None)\n ):\n raise RankingValidationError(\n \"submission contains an item rejected by eligibility service\"\n )\n return ranked_items(frame)\n\n\ndef score(\n ranked: dict[int, list[int]],\n graded: dict[int, dict[int, int]],\n) -> dict[str, float | int]:\n \"\"\"Aggregate per-user NDCG@10 over users with public relevance labels.\n\n Args:\n ranked: Ranked item IDs for every target user.\n graded: Eligible validation relevance keyed by user and item.\n\n Returns:\n The six-decimal ``quality_ndcg@10`` value and number of scored users.\n \"\"\"\n return score_rankings(ranked, graded)\n\n\ndef main() -> None:\n \"\"\"Run the public evaluator CLI and print its JSON score report.\"\"\"\n targets_frame = pd.read_parquet(DATA / \"target_users.parquet\")\n targets = set(targets_frame.uid.astype(int))\n eligibility = CandidateSet(DATA / \"validation_eligible_candidates.npz\")\n graded = validation_truth(eligibility, targets)\n\n if len(sys.argv) != 2:\n raise SystemExit(\n \"usage: evaluate_public.py \"\n )\n path = Path(sys.argv[1])\n ranked = load_submission(path, eligibility, targets)\n print(json.dumps({\"model\": str(path), \"scores\": score(ranked, graded)}, indent=2))\n\n\nif __name__ == \"__main__\":\n main()\n", "exit_code": 0, "duration": { "secs": 0, "nanos": 5360 }, "formatted_output": "total 340M\ndr-xr-xr-x 1 root root 4.0K Sep 18 23:49 .\ndr-xr-xr-x 1 root root 4.0K Sep 19 00:02 ..\n-r--r--r-- 1 root root 342K Sep 18 23:48 candidate_catalog.parquet\n-r--r--r-- 1 root root 83K Sep 18 23:48 target_users.parquet\n-r--r--r-- 1 root root 7.4M Sep 18 23:48 test_eligible_candidates.npz\n-r--r--r-- 1 root root 1.1M Sep 18 23:49 test_preference_state.parquet\n-r--r--r-- 1 root root 838K Sep 18 23:48 train_dislikes.parquet\n-r--r--r-- 1 root root 5.2M Sep 18 23:48 train_likes.parquet\n-r--r--r-- 1 root root 305M Sep 18 23:48 train_listens.parquet\n-r--r--r-- 1 root root 153K Sep 18 23:48 train_undislikes.parquet\n-r--r--r-- 1 root root 1.8M Sep 18 23:48 train_unlikes.parquet\n-r--r--r-- 1 root root 36K Sep 18 23:48 val_dislikes.parquet\n-r--r--r-- 1 root root 292K Sep 18 23:48 val_likes.parquet\n-r--r--r-- 1 root root 9.5M Sep 18 23:48 val_listens.parquet\n-r--r--r-- 1 root root 7.7K Sep 18 23:48 val_undislikes.parquet\n-r--r--r-- 1 root root 71K Sep 18 23:48 val_unlikes.parquet\n-r--r--r-- 1 root root 7.3M Sep 18 23:48 validation_eligible_candidates.npz\n-r--r--r-- 1 root root 1.1M Sep 18 23:49 validation_preference_state.parquet\n# Exact distribution inventory for the Yambda two-tower task family.\n#\n# This is an input to `uv pip sync`, not a list of minimum requirements. A\n# conforming task environment contains exactly these third-party Python\n# distributions and no others. Python itself is pinned by task.toml and both\n# Harbor image Dockerfiles.\nattrs==26.1.0\nbleach==6.4.0\ncertifi==2026.7.22\nchardet==7.6.0\ncharset-normalizer==3.5.1\nfastjsonschema==2.22.2\nfilelock==3.32.3\nfsspec==2026.7.0\nidna==3.18\nJinja2==3.1.6\njoblib==1.5.3\njsonschema==4.26.0\njsonschema-specifications==2025.9.1\njupyter-core==5.9.1\njupytext==1.19.5\nkaggle==2.2.4\nkagglesdk==0.1.37\nmarkdown-it-py==4.2.0\nMarkupSafe==3.0.3\nmdit-py-plugins==0.6.1\nmdurl==0.1.2\nmpmath==1.3.0\nnbformat==5.11.1\nnetworkx==3.6.1\nnumpy==2.2.6\npackaging==26.3\npandas==2.3.3\npillow==12.3.0\npip==26.0.1\nplatformdirs==4.11.3\nprotobuf==7.35.1\npyarrow==18.1.0\npython-dateutil==2.9.0.post0\npython-dotenv==1.2.3\npython-slugify==8.0.4\npytz==2026.3.post1\nPyYAML==6.0.3\nreferencing==0.37.0\nreportlab==4.2.5\nrequests==2.34.2\nrpds-py==2026.6.3\nscikit-learn==1.7.2\nscipy==1.15.3\nsetuptools==84.0.0\nsix==1.17.0\nsympy==1.14.0\ntext-unidecode==1.3\nthreadpoolctl==3.6.0\ntorch==2.8.0\ntqdm==4.70.0\ntraitlets==5.16.1\ntyping-extensions==4.16.0\ntzdata==2026.3\nurllib3==2.7.0\nwebencodings==0.6.1\n\"\"\"Shared public primitives for Yambda discovery-ranking evaluation.\n\nBoth the solver-visible validation evaluator and the private submission judge\nimport this module from the generated task's ``public`` directory. It owns the\nstage-independent contract: reading a ranking, validating its shape, converting\nit to per-user rank order, looking up packed candidate eligibility, and\ncomputing graded NDCG@10.\n\nThe module deliberately contains no event-derived labels, private artifact\npaths, or pass thresholds. Each evaluator supplies its own relevance data and\nper-cutoff eligibility checks around these common operations.\n\"\"\"\nfrom __future__ import annotations\n\nfrom pathlib import Path\n\nimport numpy as np\nimport pandas as pd\n\n\n__all__ = [\n \"CandidateSet\",\n \"QUALITY_K\",\n \"RankingValidationError\",\n \"REQUIRED_COLUMNS\",\n \"TOP_N\",\n \"ndcg_at_k\",\n \"ranked_items\",\n \"read_ranking\",\n \"score_rankings\",\n \"validate_ranking\",\n]\n\nTOP_N = 100\nQUALITY_K = 10\nREQUIRED_COLUMNS = (\"uid\", \"item_id\", \"rank\")\n\n\nclass RankingValidationError(ValueError):\n \"\"\"Report a ranking-schema or structural-contract violation.\"\"\"\n\n\nclass CandidateSet:\n \"\"\"Provide membership lookups over one packed candidate-set archive.\n\n The archive contains aligned ``uids``, ``item_ids``, and\n ``packed_eligible`` arrays. Candidate column ``c`` is represented by bit\n ``c % 8`` of byte ``c // 8`` using little-endian bit order. Arrays are\n copied into memory so they remain valid after the archive is closed.\n \"\"\"\n\n def __init__(self, path: Path):\n \"\"\"Load an eligibility archive and build ID-to-position indexes.\n\n Args:\n path: Path to a ``.npz`` archive with the candidate-set schema.\n \"\"\"\n with np.load(path, allow_pickle=False) as artifact:\n self.uids = artifact[\"uids\"].astype(np.int64, copy=True)\n self.item_ids = artifact[\"item_ids\"].astype(np.int64, copy=True)\n self.packed = artifact[\"packed_eligible\"].astype(np.uint8, copy=True)\n self.uid_row = {int(uid): row for row, uid in enumerate(self.uids)}\n self.item_column = {\n int(item): column for column, item in enumerate(self.item_ids)\n }\n\n def is_eligible(self, uid: int, item_id: int) -> bool:\n \"\"\"Return whether ``item_id`` is eligible for ``uid``.\n\n IDs absent from the target-user or candidate-item arrays are treated as\n ineligible rather than raising an exception.\n\n Args:\n uid: Target user ID to query.\n item_id: Candidate item ID to query.\n\n Returns:\n ``True`` only when the corresponding packed eligibility bit is set.\n \"\"\"\n row = self.uid_row.get(int(uid))\n column = self.item_column.get(int(item_id))\n if row is None or column is None:\n return False\n byte, bit = divmod(column, 8)\n return bool((int(self.packed[row, byte]) >> bit) & 1)\n\n\ndef read_ranking(path: Path) -> pd.DataFrame:\n \"\"\"Read a parquet or CSV ranking into a pandas frame.\n\n Args:\n path: Input path. A ``.parquet`` suffix selects parquet; every other\n suffix is interpreted as CSV.\n\n Returns:\n The ranking frame as loaded by pandas.\n \"\"\"\n return pd.read_parquet(path) if path.suffix == \".parquet\" else pd.read_csv(path)\n\n\ndef validate_ranking(\n frame: pd.DataFrame,\n targets: set[int],\n) -> pd.DataFrame:\n \"\"\"Normalize and validate the stage-independent ranking contract.\n\n Required values must be finite integers. The user set must exactly match\n ``targets``; every user must have 100 rows, distinct items, and each rank\n from 1 through 100 exactly once. Cutoff-specific candidate eligibility is\n intentionally left to the calling evaluator.\n\n Args:\n frame: Raw ranking frame. Extra columns are discarded from an internal\n copy; the caller's frame is not modified.\n targets: Exact set of target user IDs the ranking must cover.\n\n Returns:\n A normalized frame containing only the required ``int64`` columns.\n\n Raises:\n RankingValidationError: If the ranking violates the shared contract.\n \"\"\"\n required = list(REQUIRED_COLUMNS)\n if not all(column in frame for column in required):\n raise RankingValidationError(f\"submission requires columns {required}\")\n\n normalized = frame[required].copy()\n for column in required:\n numeric = pd.to_numeric(normalized[column], errors=\"coerce\")\n values = numeric.to_numpy(dtype=float)\n if numeric.isna().any() or not np.isfinite(values).all():\n raise RankingValidationError(\n f\"submission {column} must be finite numeric values\"\n )\n if not np.equal(numeric, np.floor(numeric)).all():\n raise RankingValidationError(\n f\"submission {column} must contain integers\"\n )\n normalized[column] = numeric.astype(np.int64)\n\n submitted_users = set(map(int, normalized.uid.unique()))\n if submitted_users != targets:\n raise RankingValidationError(\n f\"submission user set mismatch: missing={len(targets - submitted_users)} \"\n f\"extra={len(submitted_users - targets)}\"\n )\n counts = normalized.groupby(\"uid\").size()\n if not (counts == TOP_N).all():\n raise RankingValidationError(\n f\"submission must contain exactly {TOP_N} rows for every target user\"\n )\n if normalized.duplicated([\"uid\", \"item_id\"]).any():\n raise RankingValidationError(\n \"submission contains duplicate (uid, item_id) pairs\"\n )\n valid_ranks = set(range(1, TOP_N + 1))\n ranks_are_valid = normalized.groupby(\"uid\")[\"rank\"].apply(\n lambda values: set(map(int, values)) == valid_ranks\n )\n if not ranks_are_valid.all():\n raise RankingValidationError(\n f\"each user must have every rank from 1 through {TOP_N} exactly once\"\n )\n return normalized\n\n\ndef ranked_items(frame: pd.DataFrame) -> dict[int, list[int]]:\n \"\"\"Convert a validated ranking frame to ordered items keyed by user.\n\n Args:\n frame: Frame that has passed :func:`validate_ranking`.\n\n Returns:\n A ``uid -> item IDs`` mapping ordered by ascending rank.\n \"\"\"\n ordered = frame.sort_values([\"uid\", \"rank\"])\n return {\n int(uid): list(map(int, values))\n for uid, values in ordered.groupby(\"uid\").item_id\n }\n\n\ndef ndcg_at_k(ranked: list[int], gold: dict[int, int], k: int) -> float:\n \"\"\"Compute graded normalized discounted cumulative gain at ``k``.\n\n Relevance gain is ``2**grade - 1`` and the discount at one-based rank\n ``r`` is ``1 / log2(r + 1)``. Items absent from ``gold`` have grade zero.\n\n Args:\n ranked: Item IDs in predicted rank order.\n gold: Mapping from relevant item IDs to integer relevance grades.\n k: Maximum number of predicted positions to score.\n\n Returns:\n For a valid duplicate-free ranking, NDCG in ``[0, 1]``; returns\n ``0.0`` when the ideal gain is zero.\n \"\"\"\n gains = np.asarray([gold.get(item, 0) for item in ranked[:k]], dtype=np.float64)\n discounts = 1.0 / np.log2(np.arange(2, len(gains) + 2))\n dcg = float(np.sum((np.power(2.0, gains) - 1.0) * discounts))\n ideal = np.asarray(sorted(gold.values(), reverse=True)[:k], dtype=np.float64)\n ideal_discounts = 1.0 / np.log2(np.arange(2, len(ideal) + 2))\n idcg = float(np.sum((np.power(2.0, ideal) - 1.0) * ideal_discounts))\n return dcg / idcg if idcg else 0.0\n\n\ndef score_rankings(\n ranked: dict[int, list[int]],\n graded: dict[int, dict[int, int]],\n) -> dict[str, float | int]:\n \"\"\"Aggregate per-user NDCG@10 over users with relevance labels.\n\n Args:\n ranked: Ranked item IDs for every target user.\n graded: Relevant item grades keyed by user and item.\n\n Returns:\n The six-decimal ``quality_ndcg@10`` value and number of scored users.\n \"\"\"\n quality = float(\n np.mean(\n [\n ndcg_at_k(ranked[uid], gold, QUALITY_K)\n for uid, gold in graded.items()\n ]\n )\n )\n return {\n \"quality_ndcg@10\": round(quality, 6),\n \"quality_users\": len(graded),\n }\n#!/usr/bin/env python3\n\"\"\"Score a validation-stage ranking against public discovery labels.\n\n``build_task.py`` publishes this module with the solver-visible task files. It\nloads target users, validation eligibility, and validation-window events from\nthe adjacent ``data`` directory, then evaluates one ranking supplied on the\ncommand line. Stage-independent mechanics come from the adjacent public\n``ranking_evaluation.py`` module. The builder installs the same checked-in\nmodule in the private judge, so public and private scoring mechanics cannot\ndrift. A relevant candidate receives grade 3 for an organic like or grade 1 for\nan organic listen with at least 80 percent completion; a like takes precedence\nwhen both events exist.\n\nBefore scoring, the ranking must contain exactly 100 distinct eligible items\nfor every target user, with integer-valued ``uid``, ``item_id``, and ``rank``\ncolumns and ranks 1 through 100 exactly once per user. Extra columns are\nignored. Quality is graded NDCG@10, averaged only over users who have at least\none eligible relevant item in the validation window.\n\nThe evaluator prints a JSON object containing the model path and scores. It\ndoes not apply the task's pass threshold; its purpose is model development and\nselection. The private judge applies the threshold to the final submission.\n\nUsage::\n\n python evaluate_public.py \n\"\"\"\nfrom __future__ import annotations\n\nimport json\nimport sys\nfrom pathlib import Path\n\nimport pandas as pd\n\nfrom ranking_evaluation import (\n CandidateSet,\n RankingValidationError,\n ranked_items,\n read_ranking,\n score_rankings,\n validate_ranking,\n)\n\n\nHERE = Path(__file__).resolve().parent\nDATA = HERE / \"data\"\nLISTEN_STRONG = 80\n\n\ndef validation_truth(\n eligibility: CandidateSet, targets: set[int]\n) -> dict[int, dict[int, int]]:\n \"\"\"Build cutoff-correct graded relevance from public validation events.\n\n Only target-user events for eligible candidates are retained. Organic\n listens completed to at least 80 percent receive grade 1, and organic likes\n receive grade 3. Repeated user-item events are collapsed, and processing\n likes second ensures that grade 3 wins over grade 1.\n\n Args:\n eligibility: Validation-cutoff candidate membership service.\n targets: Complete set of target user IDs.\n\n Returns:\n A nested ``uid -> item_id -> grade`` mapping. Users without an eligible\n relevant event are omitted.\n \"\"\"\n listens = pd.read_parquet(DATA / \"val_listens.parquet\")\n likes = pd.read_parquet(DATA / \"val_likes.parquet\")\n strong = listens[\n listens.uid.isin(targets)\n & (listens.is_organic == 1)\n & (listens.played_ratio_pct >= LISTEN_STRONG)\n ][[\"uid\", \"item_id\"]].drop_duplicates()\n organic_likes = likes[\n likes.uid.isin(targets) & (likes.is_organic == 1)\n ][[\"uid\", \"item_id\"]].drop_duplicates()\n\n graded: dict[int, dict[int, int]] = {}\n for raw_uid, raw_item in strong.itertuples(index=False, name=None):\n uid, item = int(raw_uid), int(raw_item)\n if eligibility.is_eligible(uid, item):\n graded.setdefault(uid, {})[item] = 1\n for raw_uid, raw_item in organic_likes.itertuples(index=False, name=None):\n uid, item = int(raw_uid), int(raw_item)\n if eligibility.is_eligible(uid, item):\n graded.setdefault(uid, {})[item] = 3\n return graded\n\n\ndef load_submission(\n path: Path, eligibility: CandidateSet, targets: set[int]\n) -> dict[int, list[int]]:\n \"\"\"Load and validate a public validation ranking.\n\n Files ending in ``.parquet`` are read as parquet; every other suffix is\n read as CSV. The required columns must be integer-valued, cover exactly the\n target-user set, contain 100 rows and ranks 1 through 100 per user, avoid\n duplicate user-item pairs, and contain only cutoff-eligible items.\n\n Args:\n path: Ranking file to read.\n eligibility: Validation-cutoff candidate membership service.\n targets: Exact set of users the ranking must cover.\n\n Returns:\n A ``uid -> ranked item IDs`` mapping ordered by ascending rank.\n\n Raises:\n ValueError: If the ranking violates the required schema or invariants.\n \"\"\"\n frame = validate_ranking(read_ranking(path), targets)\n if not all(\n eligibility.is_eligible(uid, item)\n for uid, item in frame[[\"uid\", \"item_id\"]].itertuples(index=False, name=None)\n ):\n raise RankingValidationError(\n \"submission contains an item rejected by eligibility service\"\n )\n return ranked_items(frame)\n\n\ndef score(\n ranked: dict[int, list[int]],\n graded: dict[int, dict[int, int]],\n) -> dict[str, float | int]:\n \"\"\"Aggregate per-user NDCG@10 over users with public relevance labels.\n\n Args:\n ranked: Ranked item IDs for every target user.\n graded: Eligible validation relevance keyed by user and item.\n\n Returns:\n The six-decimal ``quality_ndcg@10`` value and number of scored users.\n \"\"\"\n return score_rankings(ranked, graded)\n\n\ndef main() -> None:\n \"\"\"Run the public evaluator CLI and print its JSON score report.\"\"\"\n targets_frame = pd.read_parquet(DATA / \"target_users.parquet\")\n targets = set(targets_frame.uid.astype(int))\n eligibility = CandidateSet(DATA / \"validation_eligible_candidates.npz\")\n graded = validation_truth(eligibility, targets)\n\n if len(sys.argv) != 2:\n raise SystemExit(\n \"usage: evaluate_public.py \"\n )\n path = Path(sys.argv[1])\n ranked = load_submission(path, eligibility, targets)\n print(json.dumps({\"model\": str(path), \"scores\": score(ranked, graded)}, indent=2))\n\n\nif __name__ == \"__main__\":\n main()\n" } } ## Step 8 · agent · 2026-09-19T00:05:42.929Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:05:47.796Z { "code": "const r = await tools.exec_command({cmd:\"python - <<'PY'\\nimport pyarrow.parquet as pq, pandas as pd, numpy as np, os\\nD='/task/data'\\nfor f in sorted(os.listdir(D)):\\n if f.endswith('.parquet'):\\n pf=pq.ParquetFile(D+'/'+f)\\n print(f, pf.metadata.num_rows, pf.schema.names)\\nprint('targets',pd.read_parquet(D+'/target_users.parquet').head(),pd.read_parquet(D+'/target_users.parquet').dtypes)\\nprint('catalog',pd.read_parquet(D+'/candidate_catalog.parquet').head(),pd.read_parquet(D+'/candidate_catalog.parquet').dtypes)\\nfor s in ['validation','test']:\\n z=np.load(f'{D}/{s}_eligible_candidates.npz')\\n print(s, {k:(z[k].shape,z[k].dtype) for k in z.files})\\n bits=np.unpackbits(z['packed_eligible'][:100],axis=1,count=len(z['item_ids']),bitorder='little')\\n print('elig first100', bits.sum(1).min(),bits.sum(1).mean(),bits.sum(1).max(),'uids head',z['uids'][:5],'items head',z['item_ids'][:5])\\nPY\",\"workdir\":\"/app\",\"yield_time_ms\":10000,\"max_output_tokens\":20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:05:47.850Z Script completed Wall time 0.1 seconds Output: Traceback (most recent call last): File "", line 1, in ModuleNotFoundError: No module named 'pyarrow' ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd1cfb01487d1b2b68aac8387791f", "usage": { "input_tokens": 19097, "cached_input_tokens": 14464, "cache_write_input_tokens": 0, "output_tokens": 486, "reasoning_output_tokens": 168, "total_tokens": 19583 }, "turn_token_usage": { "input_tokens": 33687, "cached_input_tokens": 28928, "cache_write_input_tokens": 0, "output_tokens": 671, "reasoning_output_tokens": 192, "total_tokens": 34358 }, "thread_token_usage": { "input_tokens": 33687, "cached_input_tokens": 28928, "cache_write_input_tokens": 0, "output_tokens": 671, "reasoning_output_tokens": 192, "total_tokens": 34358 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-1be00bc5-da6b-4910-9bcd-2375961acb3f", "process_id": "48473", "command": [ "/bin/sh", "-lc", "python - <<'PY'\nimport pyarrow.parquet as pq, pandas as pd, numpy as np, os\nD='/task/data'\nfor f in sorted(os.listdir(D)):\n if f.endswith('.parquet'):\n pf=pq.ParquetFile(D+'/'+f)\n print(f, pf.metadata.num_rows, pf.schema.names)\nprint('targets',pd.read_parquet(D+'/target_users.parquet').head(),pd.read_parquet(D+'/target_users.parquet').dtypes)\nprint('catalog',pd.read_parquet(D+'/candidate_catalog.parquet').head(),pd.read_parquet(D+'/candidate_catalog.parquet').dtypes)\nfor s in ['validation','test']:\n z=np.load(f'{D}/{s}_eligible_candidates.npz')\n print(s, {k:(z[k].shape,z[k].dtype) for k in z.files})\n bits=np.unpackbits(z['packed_eligible'][:100],axis=1,count=len(z['item_ids']),bitorder='little')\n print('elig first100', bits.sum(1).min(),bits.sum(1).mean(),bits.sum(1).max(),'uids head',z['uids'][:5],'items head',z['item_ids'][:5])\nPY" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "python - <<'PY'\nimport pyarrow.parquet as pq, pandas as pd, numpy as np, os\nD='/task/data'\nfor f in sorted(os.listdir(D)):\n if f.endswith('.parquet'):\n pf=pq.ParquetFile(D+'/'+f)\n print(f, pf.metadata.num_rows, pf.schema.names)\nprint('targets',pd.read_parquet(D+'/target_users.parquet').head(),pd.read_parquet(D+'/target_users.parquet').dtypes)\nprint('catalog',pd.read_parquet(D+'/candidate_catalog.parquet').head(),pd.read_parquet(D+'/candidate_catalog.parquet').dtypes)\nfor s in ['validation','test']:\n z=np.load(f'{D}/{s}_eligible_candidates.npz')\n print(s, {k:(z[k].shape,z[k].dtype) for k in z.files})\n bits=np.unpackbits(z['packed_eligible'][:100],axis=1,count=len(z['item_ids']),bitorder='little')\n print('elig first100', bits.sum(1).min(),bits.sum(1).mean(),bits.sum(1).max(),'uids head',z['uids'][:5],'items head',z['item_ids'][:5])\nPY" } ], "source": "unified_exec_startup", "status": "failed", "stdout": "Traceback (most recent call last):\n File \"\", line 1, in \nModuleNotFoundError: No module named 'pyarrow'\n", "stderr": "", "aggregated_output": "Traceback (most recent call last):\n File \"\", line 1, in \nModuleNotFoundError: No module named 'pyarrow'\n", "exit_code": 1, "duration": { "secs": 0, "nanos": 2180 }, "formatted_output": "Traceback (most recent call last):\n File \"\", line 1, in \nModuleNotFoundError: No module named 'pyarrow'\n" } } ## Step 9 · agent · 2026-09-19T00:05:50.075Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:05:51.612Z { "code": "const r = await tools.exec_command({cmd:\"which python; python --version; ls -la /app; find / -maxdepth 3 -type f -name python 2>/dev/null | head -30; env | sort | sed -n '1,160p'\",\"workdir\":\"/app\",\"yield_time_ms\":10000,\"max_output_tokens\":10000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:05:51.701Z Script completed Wall time 0.1 seconds Output: /usr/local/bin/python Python 3.12.13 total 12 drwxr-xr-x 3 agent agent 4096 Sep 19 00:02 . drwxr-xr-x 1 root root 4096 Sep 19 00:05 .. drwxr-xr-x 2 agent agent 4096 Sep 19 00:02 solution CODEX_CI=1 CODEX_HOME=/tmp/codex-home CODEX_SESSION_ID=01a0b6fb-779f-7870-9aa1-f2287ff99f80 CODEX_THREAD_ID=01a0b6fb-779f-7870-9aa1-f2287ff99f80 COLORTERM= GH_PAGER=cat GIT_PAGER=cat GPG_KEY=7169605F62C751356D054A26A821E680E5FA6305 HOME=/home/agent HOSTNAME=9c63c04f7cfa LANG=C.UTF-8 LC_ALL=C.UTF-8 LC_CTYPE=C.UTF-8 NO_COLOR=1 PAGER=cat PATH=/opt/codex-home/packages/standalone/releases/0.153.4-x86_64-unknown-linux-musl/codex-path:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games PWD=/app PYTHONDONTWRITEBYTECODE=1 PYTHONNOUSERSITE=1 PYTHON_SHA256=c08bc65a81971c1dd5783182826503369466c7e67374d1646519adf05207b684 PYTHON_VERSION=3.12.13 SHLVL=1 TERM=dumb _=/usr/local/bin/codex ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-908c37dd-0b63-46e2-ae52-fc11156e001d", "process_id": "97520", "command": [ "/bin/sh", "-lc", "which python; python --version; ls -la /app; find / -maxdepth 3 -type f -name python 2>/dev/null | head -30; env | sort | sed -n '1,160p'" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "which python; python --version; ls -la /app; find / -maxdepth 3 -type f -name python 2>/dev/null | head -30; env | sort | sed -n '1,160p'" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "/usr/local/bin/python\nPython 3.12.13\ntotal 12\ndrwxr-xr-x 3 agent agent 4096 Sep 19 00:02 .\ndrwxr-xr-x 1 root root 4096 Sep 19 00:05 ..\ndrwxr-xr-x 2 agent agent 4096 Sep 19 00:02 solution\nCODEX_CI=1\nCODEX_HOME=/tmp/codex-home\nCODEX_SESSION_ID=01a0b6fb-779f-7870-9aa1-f2287ff99f80\nCODEX_THREAD_ID=01a0b6fb-779f-7870-9aa1-f2287ff99f80\nCOLORTERM=\nGH_PAGER=cat\nGIT_PAGER=cat\nGPG_KEY=7169605F62C751356D054A26A821E680E5FA6305\nHOME=/home/agent\nHOSTNAME=9c63c04f7cfa\nLANG=C.UTF-8\nLC_ALL=C.UTF-8\nLC_CTYPE=C.UTF-8\nNO_COLOR=1\nPAGER=cat\nPATH=/opt/codex-home/packages/standalone/releases/0.153.4-x86_64-unknown-linux-musl/codex-path:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games\nPWD=/app\nPYTHONDONTWRITEBYTECODE=1\nPYTHONNOUSERSITE=1\nPYTHON_SHA256=c08bc65a81971c1dd5783182826503369466c7e67374d1646519adf05207b684\nPYTHON_VERSION=3.12.13\nSHLVL=1\nTERM=dumb\n_=/usr/local/bin/codex\n", "stderr": "", "aggregated_output": "/usr/local/bin/python\nPython 3.12.13\ntotal 12\ndrwxr-xr-x 3 agent agent 4096 Sep 19 00:02 .\ndrwxr-xr-x 1 root root 4096 Sep 19 00:05 ..\ndrwxr-xr-x 2 agent agent 4096 Sep 19 00:02 solution\nCODEX_CI=1\nCODEX_HOME=/tmp/codex-home\nCODEX_SESSION_ID=01a0b6fb-779f-7870-9aa1-f2287ff99f80\nCODEX_THREAD_ID=01a0b6fb-779f-7870-9aa1-f2287ff99f80\nCOLORTERM=\nGH_PAGER=cat\nGIT_PAGER=cat\nGPG_KEY=7169605F62C751356D054A26A821E680E5FA6305\nHOME=/home/agent\nHOSTNAME=9c63c04f7cfa\nLANG=C.UTF-8\nLC_ALL=C.UTF-8\nLC_CTYPE=C.UTF-8\nNO_COLOR=1\nPAGER=cat\nPATH=/opt/codex-home/packages/standalone/releases/0.153.4-x86_64-unknown-linux-musl/codex-path:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games\nPWD=/app\nPYTHONDONTWRITEBYTECODE=1\nPYTHONNOUSERSITE=1\nPYTHON_SHA256=c08bc65a81971c1dd5783182826503369466c7e67374d1646519adf05207b684\nPYTHON_VERSION=3.12.13\nSHLVL=1\nTERM=dumb\n_=/usr/local/bin/codex\n", "exit_code": 0, "duration": { "secs": 0, "nanos": 6010 }, "formatted_output": "/usr/local/bin/python\nPython 3.12.13\ntotal 12\ndrwxr-xr-x 3 agent agent 4096 Sep 19 00:02 .\ndrwxr-xr-x 1 root root 4096 Sep 19 00:05 ..\ndrwxr-xr-x 2 agent agent 4096 Sep 19 00:02 solution\nCODEX_CI=1\nCODEX_HOME=/tmp/codex-home\nCODEX_SESSION_ID=01a0b6fb-779f-7870-9aa1-f2287ff99f80\nCODEX_THREAD_ID=01a0b6fb-779f-7870-9aa1-f2287ff99f80\nCOLORTERM=\nGH_PAGER=cat\nGIT_PAGER=cat\nGPG_KEY=7169605F62C751356D054A26A821E680E5FA6305\nHOME=/home/agent\nHOSTNAME=9c63c04f7cfa\nLANG=C.UTF-8\nLC_ALL=C.UTF-8\nLC_CTYPE=C.UTF-8\nNO_COLOR=1\nPAGER=cat\nPATH=/opt/codex-home/packages/standalone/releases/0.153.4-x86_64-unknown-linux-musl/codex-path:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games\nPWD=/app\nPYTHONDONTWRITEBYTECODE=1\nPYTHONNOUSERSITE=1\nPYTHON_SHA256=c08bc65a81971c1dd5783182826503369466c7e67374d1646519adf05207b684\nPYTHON_VERSION=3.12.13\nSHLVL=1\nTERM=dumb\n_=/usr/local/bin/codex\n" } } ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd1dc23c887d1bbd88d8b01547e8c", "usage": { "input_tokens": 19639, "cached_input_tokens": 18944, "cache_write_input_tokens": 0, "output_tokens": 115, "reasoning_output_tokens": 19, "total_tokens": 19754 }, "turn_token_usage": { "input_tokens": 53326, "cached_input_tokens": 47872, "cache_write_input_tokens": 0, "output_tokens": 786, "reasoning_output_tokens": 211, "total_tokens": 54112 }, "thread_token_usage": { "input_tokens": 53326, "cached_input_tokens": 47872, "cache_write_input_tokens": 0, "output_tokens": 786, "reasoning_output_tokens": 211, "total_tokens": 54112 } } ## Step 10 · agent · 2026-09-19T00:05:53.666Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:05:55.340Z { "code": "const r = await tools.exec_command({cmd:\"find /opt /task /usr/local -maxdepth 4 -type f \\\\( -name 'activate' -o -name 'python3.13' -o -name 'python3.12' \\\\) 2>/dev/null | head -80; ls -la /task\",\"workdir\":\"/app\",\"yield_time_ms\":10000,\"max_output_tokens\":10000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:05:55.387Z Script completed Wall time 0.0 seconds Output: /opt/task-venv/bin/activate /usr/local/bin/python3.12 total 36 dr-xr-xr-x 1 root root 4096 Sep 19 00:02 . drwxr-xr-x 1 root root 4096 Sep 19 00:05 .. -r--r--r-- 1 root root 0 Sep 18 23:48 .keep dr-xr-xr-x 1 root root 4096 Sep 18 23:49 data -r--r--r-- 1 root root 5774 Sep 18 23:48 evaluate_public.py -r--r--r-- 1 root root 8265 Sep 18 23:48 ranking_evaluation.py -r--r--r-- 1 root root 1295 Sep 18 23:48 requirements.txt ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd1e000a487d1adb41bbb829b64a0", "usage": { "input_tokens": 20167, "cached_input_tokens": 19456, "cache_write_input_tokens": 0, "output_tokens": 125, "reasoning_output_tokens": 18, "total_tokens": 20292 }, "turn_token_usage": { "input_tokens": 73493, "cached_input_tokens": 67328, "cache_write_input_tokens": 0, "output_tokens": 911, "reasoning_output_tokens": 229, "total_tokens": 74404 }, "thread_token_usage": { "input_tokens": 73493, "cached_input_tokens": 67328, "cache_write_input_tokens": 0, "output_tokens": 911, "reasoning_output_tokens": 229, "total_tokens": 74404 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-6f4bdf76-8ff6-4222-8de3-92c0d299e970", "process_id": "2838", "command": [ "/bin/sh", "-lc", "find /opt /task /usr/local -maxdepth 4 -type f \\( -name 'activate' -o -name 'python3.13' -o -name 'python3.12' \\) 2>/dev/null | head -80; ls -la /task" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "find /opt /task /usr/local -maxdepth 4 -type f \\( -name 'activate' -o -name 'python3.13' -o -name 'python3.12' \\) 2>/dev/null | head -80; ls -la /task" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "/opt/task-venv/bin/activate\n/usr/local/bin/python3.12\ntotal 36\ndr-xr-xr-x 1 root root 4096 Sep 19 00:02 .\ndrwxr-xr-x 1 root root 4096 Sep 19 00:05 ..\n-r--r--r-- 1 root root 0 Sep 18 23:48 .keep\ndr-xr-xr-x 1 root root 4096 Sep 18 23:49 data\n-r--r--r-- 1 root root 5774 Sep 18 23:48 evaluate_public.py\n-r--r--r-- 1 root root 8265 Sep 18 23:48 ranking_evaluation.py\n-r--r--r-- 1 root root 1295 Sep 18 23:48 requirements.txt\n", "stderr": "", "aggregated_output": "/opt/task-venv/bin/activate\n/usr/local/bin/python3.12\ntotal 36\ndr-xr-xr-x 1 root root 4096 Sep 19 00:02 .\ndrwxr-xr-x 1 root root 4096 Sep 19 00:05 ..\n-r--r--r-- 1 root root 0 Sep 18 23:48 .keep\ndr-xr-xr-x 1 root root 4096 Sep 18 23:49 data\n-r--r--r-- 1 root root 5774 Sep 18 23:48 evaluate_public.py\n-r--r--r-- 1 root root 8265 Sep 18 23:48 ranking_evaluation.py\n-r--r--r-- 1 root root 1295 Sep 18 23:48 requirements.txt\n", "exit_code": 0, "duration": { "secs": 0, "nanos": 2120 }, "formatted_output": "/opt/task-venv/bin/activate\n/usr/local/bin/python3.12\ntotal 36\ndr-xr-xr-x 1 root root 4096 Sep 19 00:02 .\ndrwxr-xr-x 1 root root 4096 Sep 19 00:05 ..\n-r--r--r-- 1 root root 0 Sep 18 23:48 .keep\ndr-xr-xr-x 1 root root 4096 Sep 18 23:49 data\n-r--r--r-- 1 root root 5774 Sep 18 23:48 evaluate_public.py\n-r--r--r-- 1 root root 8265 Sep 18 23:48 ranking_evaluation.py\n-r--r--r-- 1 root root 1295 Sep 18 23:48 requirements.txt\n" } } ## Step 11 · agent · 2026-09-19T00:05:57.128Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:06:03.153Z { "code": "const r = await tools.exec_command({cmd:\"/opt/task-venv/bin/python - <<'PY'\\nimport pyarrow.parquet as pq, pandas as pd, numpy as np, os\\nD='/task/data'\\nfor f in sorted(os.listdir(D)):\\n if f.endswith('.parquet'):\\n pf=pq.ParquetFile(D+'/'+f)\\n print(f, pf.metadata.num_rows, pf.schema.names)\\nprint('targets',pd.read_parquet(D+'/target_users.parquet').head(),pd.read_parquet(D+'/target_users.parquet').dtypes)\\nprint('catalog',pd.read_parquet(D+'/candidate_catalog.parquet').head(),pd.read_parquet(D+'/candidate_catalog.parquet').dtypes)\\nfor s in ['validation','test']:\\n z=np.load(f'{D}/{s}_eligible_candidates.npz')\\n print(s, {k:(z[k].shape,z[k].dtype) for k in z.files})\\n bits=np.unpackbits(z['packed_eligible'][:100],axis=1,count=len(z['item_ids']),bitorder='little')\\n print('elig first100', bits.sum(1).min(),bits.sum(1).mean(),bits.sum(1).max(),'uids head',z['uids'][:5],'items head',z['item_ids'][:5])\\nPY\",\"workdir\":\"/app\",\"yield_time_ms\":10000,\"max_output_tokens\":20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:06:05.307Z Script completed Wall time 2.1 seconds Output: candidate_catalog.parquet 30000 ['item_id', 'positive_listens', 'organic_positive_listens', 'popularity_rank'] target_users.parquet 8456 ['uid', 'recent_positive_listens', 'history_positive_listens'] test_preference_state.parquet 484776 ['uid', 'item_id', 'state'] train_dislikes.parquet 101075 ['uid', 'timestamp', 'item_id', 'is_organic'] train_likes.parquet 814831 ['uid', 'timestamp', 'item_id', 'is_organic'] train_listens.parquet 43484159 ['uid', 'timestamp', 'item_id', 'is_organic', 'played_ratio_pct', 'track_length_seconds'] train_undislikes.parquet 19960 ['uid', 'timestamp', 'item_id', 'is_organic'] train_unlikes.parquet 292665 ['uid', 'timestamp', 'item_id', 'is_organic'] val_dislikes.parquet 3563 ['uid', 'timestamp', 'item_id', 'is_organic'] val_likes.parquet 37795 ['uid', 'timestamp', 'item_id', 'is_organic'] val_listens.parquet 1501697 ['uid', 'timestamp', 'item_id', 'is_organic', 'played_ratio_pct', 'track_length_seconds'] val_undislikes.parquet 606 ['uid', 'timestamp', 'item_id', 'is_organic'] val_unlikes.parquet 9346 ['uid', 'timestamp', 'item_id', 'is_organic'] validation_preference_state.parquet 469124 ['uid', 'item_id', 'state'] targets uid recent_positive_listens history_positive_listens 0 100 844.0 2604 1 200 50.0 286 2 300 168.0 359 3 600 1985.0 2423 4 700 1776.0 6114 uid uint32 recent_positive_listens float64 history_positive_listens int64 dtype: object catalog item_id positive_listens organic_positive_listens popularity_rank 0 5862961 26615 20620 1 1 6901374 25536 17347 2 2 5635052 24691 17194 3 3 3542184 24075 17699 4 4 9378983 24036 18195 5 item_id uint32 positive_listens int64 organic_positive_listens uint64 popularity_rank int32 dtype: object validation {'uids': ((8456,), dtype('uint32')), 'item_ids': ((30000,), dtype('uint32')), 'packed_eligible': ((8456, 3750), dtype('uint8'))} elig first100 25547 29098.94 29971 uids head [100 200 300 600 700] items head [5862961 6901374 5635052 3542184 9378983] test {'uids': ((8456,), dtype('uint32')), 'item_ids': ((30000,), dtype('uint32')), 'packed_eligible': ((8456, 3750), dtype('uint8'))} elig first100 25511 29072.53 29969 uids head [100 200 300 600 700] items head [5862961 6901374 5635052 3542184 9378983] ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd1e3e2d487d1a70f9f89456af31a", "usage": { "input_tokens": 20495, "cached_input_tokens": 19968, "cache_write_input_tokens": 0, "output_tokens": 339, "reasoning_output_tokens": 14, "total_tokens": 20834 }, "turn_token_usage": { "input_tokens": 93988, "cached_input_tokens": 87296, "cache_write_input_tokens": 0, "output_tokens": 1250, "reasoning_output_tokens": 243, "total_tokens": 95238 }, "thread_token_usage": { "input_tokens": 93988, "cached_input_tokens": 87296, "cache_write_input_tokens": 0, "output_tokens": 1250, "reasoning_output_tokens": 243, "total_tokens": 95238 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-8e666826-fe48-4ac3-b6fe-7b6d68a3db8f", "process_id": "86080", "command": [ "/bin/sh", "-lc", "/opt/task-venv/bin/python - <<'PY'\nimport pyarrow.parquet as pq, pandas as pd, numpy as np, os\nD='/task/data'\nfor f in sorted(os.listdir(D)):\n if f.endswith('.parquet'):\n pf=pq.ParquetFile(D+'/'+f)\n print(f, pf.metadata.num_rows, pf.schema.names)\nprint('targets',pd.read_parquet(D+'/target_users.parquet').head(),pd.read_parquet(D+'/target_users.parquet').dtypes)\nprint('catalog',pd.read_parquet(D+'/candidate_catalog.parquet').head(),pd.read_parquet(D+'/candidate_catalog.parquet').dtypes)\nfor s in ['validation','test']:\n z=np.load(f'{D}/{s}_eligible_candidates.npz')\n print(s, {k:(z[k].shape,z[k].dtype) for k in z.files})\n bits=np.unpackbits(z['packed_eligible'][:100],axis=1,count=len(z['item_ids']),bitorder='little')\n print('elig first100', bits.sum(1).min(),bits.sum(1).mean(),bits.sum(1).max(),'uids head',z['uids'][:5],'items head',z['item_ids'][:5])\nPY" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "/opt/task-venv/bin/python - <<'PY'\nimport pyarrow.parquet as pq, pandas as pd, numpy as np, os\nD='/task/data'\nfor f in sorted(os.listdir(D)):\n if f.endswith('.parquet'):\n pf=pq.ParquetFile(D+'/'+f)\n print(f, pf.metadata.num_rows, pf.schema.names)\nprint('targets',pd.read_parquet(D+'/target_users.parquet').head(),pd.read_parquet(D+'/target_users.parquet').dtypes)\nprint('catalog',pd.read_parquet(D+'/candidate_catalog.parquet').head(),pd.read_parquet(D+'/candidate_catalog.parquet').dtypes)\nfor s in ['validation','test']:\n z=np.load(f'{D}/{s}_eligible_candidates.npz')\n print(s, {k:(z[k].shape,z[k].dtype) for k in z.files})\n bits=np.unpackbits(z['packed_eligible'][:100],axis=1,count=len(z['item_ids']),bitorder='little')\n print('elig first100', bits.sum(1).min(),bits.sum(1).mean(),bits.sum(1).max(),'uids head',z['uids'][:5],'items head',z['item_ids'][:5])\nPY" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "candidate_catalog.parquet 30000 ['item_id', 'positive_listens', 'organic_positive_listens', 'popularity_rank']\ntarget_users.parquet 8456 ['uid', 'recent_positive_listens', 'history_positive_listens']\ntest_preference_state.parquet 484776 ['uid', 'item_id', 'state']\ntrain_dislikes.parquet 101075 ['uid', 'timestamp', 'item_id', 'is_organic']\ntrain_likes.parquet 814831 ['uid', 'timestamp', 'item_id', 'is_organic']\ntrain_listens.parquet 43484159 ['uid', 'timestamp', 'item_id', 'is_organic', 'played_ratio_pct', 'track_length_seconds']\ntrain_undislikes.parquet 19960 ['uid', 'timestamp', 'item_id', 'is_organic']\ntrain_unlikes.parquet 292665 ['uid', 'timestamp', 'item_id', 'is_organic']\nval_dislikes.parquet 3563 ['uid', 'timestamp', 'item_id', 'is_organic']\nval_likes.parquet 37795 ['uid', 'timestamp', 'item_id', 'is_organic']\nval_listens.parquet 1501697 ['uid', 'timestamp', 'item_id', 'is_organic', 'played_ratio_pct', 'track_length_seconds']\nval_undislikes.parquet 606 ['uid', 'timestamp', 'item_id', 'is_organic']\nval_unlikes.parquet 9346 ['uid', 'timestamp', 'item_id', 'is_organic']\nvalidation_preference_state.parquet 469124 ['uid', 'item_id', 'state']\ntargets uid recent_positive_listens history_positive_listens\n0 100 844.0 2604\n1 200 50.0 286\n2 300 168.0 359\n3 600 1985.0 2423\n4 700 1776.0 6114 uid uint32\nrecent_positive_listens float64\nhistory_positive_listens int64\ndtype: object\ncatalog item_id positive_listens organic_positive_listens popularity_rank\n0 5862961 26615 20620 1\n1 6901374 25536 17347 2\n2 5635052 24691 17194 3\n3 3542184 24075 17699 4\n4 9378983 24036 18195 5 item_id uint32\npositive_listens int64\norganic_positive_listens uint64\npopularity_rank int32\ndtype: object\nvalidation {'uids': ((8456,), dtype('uint32')), 'item_ids': ((30000,), dtype('uint32')), 'packed_eligible': ((8456, 3750), dtype('uint8'))}\nelig first100 25547 29098.94 29971 uids head [100 200 300 600 700] items head [5862961 6901374 5635052 3542184 9378983]\ntest {'uids': ((8456,), dtype('uint32')), 'item_ids': ((30000,), dtype('uint32')), 'packed_eligible': ((8456, 3750), dtype('uint8'))}\nelig first100 25511 29072.53 29969 uids head [100 200 300 600 700] items head [5862961 6901374 5635052 3542184 9378983]\n", "stderr": "", "aggregated_output": "candidate_catalog.parquet 30000 ['item_id', 'positive_listens', 'organic_positive_listens', 'popularity_rank']\ntarget_users.parquet 8456 ['uid', 'recent_positive_listens', 'history_positive_listens']\ntest_preference_state.parquet 484776 ['uid', 'item_id', 'state']\ntrain_dislikes.parquet 101075 ['uid', 'timestamp', 'item_id', 'is_organic']\ntrain_likes.parquet 814831 ['uid', 'timestamp', 'item_id', 'is_organic']\ntrain_listens.parquet 43484159 ['uid', 'timestamp', 'item_id', 'is_organic', 'played_ratio_pct', 'track_length_seconds']\ntrain_undislikes.parquet 19960 ['uid', 'timestamp', 'item_id', 'is_organic']\ntrain_unlikes.parquet 292665 ['uid', 'timestamp', 'item_id', 'is_organic']\nval_dislikes.parquet 3563 ['uid', 'timestamp', 'item_id', 'is_organic']\nval_likes.parquet 37795 ['uid', 'timestamp', 'item_id', 'is_organic']\nval_listens.parquet 1501697 ['uid', 'timestamp', 'item_id', 'is_organic', 'played_ratio_pct', 'track_length_seconds']\nval_undislikes.parquet 606 ['uid', 'timestamp', 'item_id', 'is_organic']\nval_unlikes.parquet 9346 ['uid', 'timestamp', 'item_id', 'is_organic']\nvalidation_preference_state.parquet 469124 ['uid', 'item_id', 'state']\ntargets uid recent_positive_listens history_positive_listens\n0 100 844.0 2604\n1 200 50.0 286\n2 300 168.0 359\n3 600 1985.0 2423\n4 700 1776.0 6114 uid uint32\nrecent_positive_listens float64\nhistory_positive_listens int64\ndtype: object\ncatalog item_id positive_listens organic_positive_listens popularity_rank\n0 5862961 26615 20620 1\n1 6901374 25536 17347 2\n2 5635052 24691 17194 3\n3 3542184 24075 17699 4\n4 9378983 24036 18195 5 item_id uint32\npositive_listens int64\norganic_positive_listens uint64\npopularity_rank int32\ndtype: object\nvalidation {'uids': ((8456,), dtype('uint32')), 'item_ids': ((30000,), dtype('uint32')), 'packed_eligible': ((8456, 3750), dtype('uint8'))}\nelig first100 25547 29098.94 29971 uids head [100 200 300 600 700] items head [5862961 6901374 5635052 3542184 9378983]\ntest {'uids': ((8456,), dtype('uint32')), 'item_ids': ((30000,), dtype('uint32')), 'packed_eligible': ((8456, 3750), dtype('uint8'))}\nelig first100 25511 29072.53 29969 uids head [100 200 300 600 700] items head [5862961 6901374 5635052 3542184 9378983]\n", "exit_code": 0, "duration": { "secs": 1, "nanos": 986456889 }, "formatted_output": "candidate_catalog.parquet 30000 ['item_id', 'positive_listens', 'organic_positive_listens', 'popularity_rank']\ntarget_users.parquet 8456 ['uid', 'recent_positive_listens', 'history_positive_listens']\ntest_preference_state.parquet 484776 ['uid', 'item_id', 'state']\ntrain_dislikes.parquet 101075 ['uid', 'timestamp', 'item_id', 'is_organic']\ntrain_likes.parquet 814831 ['uid', 'timestamp', 'item_id', 'is_organic']\ntrain_listens.parquet 43484159 ['uid', 'timestamp', 'item_id', 'is_organic', 'played_ratio_pct', 'track_length_seconds']\ntrain_undislikes.parquet 19960 ['uid', 'timestamp', 'item_id', 'is_organic']\ntrain_unlikes.parquet 292665 ['uid', 'timestamp', 'item_id', 'is_organic']\nval_dislikes.parquet 3563 ['uid', 'timestamp', 'item_id', 'is_organic']\nval_likes.parquet 37795 ['uid', 'timestamp', 'item_id', 'is_organic']\nval_listens.parquet 1501697 ['uid', 'timestamp', 'item_id', 'is_organic', 'played_ratio_pct', 'track_length_seconds']\nval_undislikes.parquet 606 ['uid', 'timestamp', 'item_id', 'is_organic']\nval_unlikes.parquet 9346 ['uid', 'timestamp', 'item_id', 'is_organic']\nvalidation_preference_state.parquet 469124 ['uid', 'item_id', 'state']\ntargets uid recent_positive_listens history_positive_listens\n0 100 844.0 2604\n1 200 50.0 286\n2 300 168.0 359\n3 600 1985.0 2423\n4 700 1776.0 6114 uid uint32\nrecent_positive_listens float64\nhistory_positive_listens int64\ndtype: object\ncatalog item_id positive_listens organic_positive_listens popularity_rank\n0 5862961 26615 20620 1\n1 6901374 25536 17347 2\n2 5635052 24691 17194 3\n3 3542184 24075 17699 4\n4 9378983 24036 18195 5 item_id uint32\npositive_listens int64\norganic_positive_listens uint64\npopularity_rank int32\ndtype: object\nvalidation {'uids': ((8456,), dtype('uint32')), 'item_ids': ((30000,), dtype('uint32')), 'packed_eligible': ((8456, 3750), dtype('uint8'))}\nelig first100 25547 29098.94 29971 uids head [100 200 300 600 700] items head [5862961 6901374 5635052 3542184 9378983]\ntest {'uids': ((8456,), dtype('uint32')), 'item_ids': ((30000,), dtype('uint32')), 'packed_eligible': ((8456, 3750), dtype('uint8'))}\nelig first100 25511 29072.53 29969 uids head [100 200 300 600 700] items head [5862961 6901374 5635052 3542184 9378983]\n" } } ## Step 12 · agent · 2026-09-19T00:06:09.909Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:06:13.573Z { "code": "const r = await tools.exec_command({cmd:\"free -h; /opt/task-venv/bin/python - <<'PY'\\nimport pyarrow.parquet as pq\\np=pq.ParquetFile('/task/data/train_listens.parquet')\\nprint(p.metadata.num_row_groups)\\nfor rg in range(min(10,p.metadata.num_row_groups)):\\n m=p.metadata.row_group(rg)\\n vals=[]\\n for col in ['uid','timestamp','item_id']:\\n c=m.column(p.schema.names.index(col)); vals.append((col,c.statistics.min,c.statistics.max))\\n print(rg,m.num_rows,vals)\\nPY\",\"workdir\":\"/app\",\"yield_time_ms\":10000,\"max_output_tokens\":10000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:06:14.052Z Script completed Wall time 0.5 seconds Output: /bin/sh: 1: free: not found 42 0 1048576 [('uid', 100, 26500), ('timestamp', 15, 24786690), ('item_id', 206, 9390541)] 1 1048576 [('uid', 26500, 50300), ('timestamp', 185, 24786725), ('item_id', 105, 9390541)] 2 1048576 [('uid', 50300, 73100), ('timestamp', 15320, 24786790), ('item_id', 105, 9390461)] 3 1048576 [('uid', 73100, 98200), ('timestamp', 3625, 24786795), ('item_id', 167, 9390623)] 4 1048576 [('uid', 98200, 122600), ('timestamp', 5735, 24786740), ('item_id', 50, 9390541)] 5 1048576 [('uid', 122600, 147100), ('timestamp', 120, 24786775), ('item_id', 22, 9390541)] 6 1048576 [('uid', 147100, 171600), ('timestamp', 140, 24786750), ('item_id', 50, 9390601)] 7 1048576 [('uid', 171600, 195600), ('timestamp', 220, 24786745), ('item_id', 50, 9390554)] 8 1048576 [('uid', 195600, 216500), ('timestamp', 1890, 24786770), ('item_id', 50, 9390528)] 9 1048576 [('uid', 216500, 241800), ('timestamp', 65, 24786735), ('item_id', 26, 9390541)] ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd1ee4cdc87d1947144e129bcfe65", "usage": { "input_tokens": 21637, "cached_input_tokens": 20352, "cache_write_input_tokens": 0, "output_tokens": 232, "reasoning_output_tokens": 58, "total_tokens": 21869 }, "turn_token_usage": { "input_tokens": 115625, "cached_input_tokens": 107648, "cache_write_input_tokens": 0, "output_tokens": 1482, "reasoning_output_tokens": 301, "total_tokens": 117107 }, "thread_token_usage": { "input_tokens": 115625, "cached_input_tokens": 107648, "cache_write_input_tokens": 0, "output_tokens": 1482, "reasoning_output_tokens": 301, "total_tokens": 117107 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-19831a81-c7be-4c1b-8422-d2f2f165942f", "process_id": "62502", "command": [ "/bin/sh", "-lc", "free -h; /opt/task-venv/bin/python - <<'PY'\nimport pyarrow.parquet as pq\np=pq.ParquetFile('/task/data/train_listens.parquet')\nprint(p.metadata.num_row_groups)\nfor rg in range(min(10,p.metadata.num_row_groups)):\n m=p.metadata.row_group(rg)\n vals=[]\n for col in ['uid','timestamp','item_id']:\n c=m.column(p.schema.names.index(col)); vals.append((col,c.statistics.min,c.statistics.max))\n print(rg,m.num_rows,vals)\nPY" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "free -h; /opt/task-venv/bin/python - <<'PY'\nimport pyarrow.parquet as pq\np=pq.ParquetFile('/task/data/train_listens.parquet')\nprint(p.metadata.num_row_groups)\nfor rg in range(min(10,p.metadata.num_row_groups)):\n m=p.metadata.row_group(rg)\n vals=[]\n for col in ['uid','timestamp','item_id']:\n c=m.column(p.schema.names.index(col)); vals.append((col,c.statistics.min,c.statistics.max))\n print(rg,m.num_rows,vals)\nPY" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "42\n0 1048576 [('uid', 100, 26500), ('timestamp', 15, 24786690), ('item_id', 206, 9390541)]\n1 1048576 [('uid', 26500, 50300), ('timestamp', 185, 24786725), ('item_id', 105, 9390541)]\n2 1048576 [('uid', 50300, 73100), ('timestamp', 15320, 24786790), ('item_id', 105, 9390461)]\n3 1048576 [('uid', 73100, 98200), ('timestamp', 3625, 24786795), ('item_id', 167, 9390623)]\n4 1048576 [('uid', 98200, 122600), ('timestamp', 5735, 24786740), ('item_id', 50, 9390541)]\n5 1048576 [('uid', 122600, 147100), ('timestamp', 120, 24786775), ('item_id', 22, 9390541)]\n6 1048576 [('uid', 147100, 171600), ('timestamp', 140, 24786750), ('item_id', 50, 9390601)]\n7 1048576 [('uid', 171600, 195600), ('timestamp', 220, 24786745), ('item_id', 50, 9390554)]\n8 1048576 [('uid', 195600, 216500), ('timestamp', 1890, 24786770), ('item_id', 50, 9390528)]\n9 1048576 [('uid', 216500, 241800), ('timestamp', 65, 24786735), ('item_id', 26, 9390541)]\n", "stderr": "", "aggregated_output": "42\n0 1048576 [('uid', 100, 26500), ('timestamp', 15, 24786690), ('item_id', 206, 9390541)]\n1 1048576 [('uid', 26500, 50300), ('timestamp', 185, 24786725), ('item_id', 105, 9390541)]\n2 1048576 [('uid', 50300, 73100), ('timestamp', 15320, 24786790), ('item_id', 105, 9390461)]\n3 1048576 [('uid', 73100, 98200), ('timestamp', 3625, 24786795), ('item_id', 167, 9390623)]\n4 1048576 [('uid', 98200, 122600), ('timestamp', 5735, 24786740), ('item_id', 50, 9390541)]\n5 1048576 [('uid', 122600, 147100), ('timestamp', 120, 24786775), ('item_id', 22, 9390541)]\n6 1048576 [('uid', 147100, 171600), ('timestamp', 140, 24786750), ('item_id', 50, 9390601)]\n7 1048576 [('uid', 171600, 195600), ('timestamp', 220, 24786745), ('item_id', 50, 9390554)]\n8 1048576 [('uid', 195600, 216500), ('timestamp', 1890, 24786770), ('item_id', 50, 9390528)]\n9 1048576 [('uid', 216500, 241800), ('timestamp', 65, 24786735), ('item_id', 26, 9390541)]\n", "exit_code": 0, "duration": { "secs": 0, "nanos": 310192407 }, "formatted_output": "42\n0 1048576 [('uid', 100, 26500), ('timestamp', 15, 24786690), ('item_id', 206, 9390541)]\n1 1048576 [('uid', 26500, 50300), ('timestamp', 185, 24786725), ('item_id', 105, 9390541)]\n2 1048576 [('uid', 50300, 73100), ('timestamp', 15320, 24786790), ('item_id', 105, 9390461)]\n3 1048576 [('uid', 73100, 98200), ('timestamp', 3625, 24786795), ('item_id', 167, 9390623)]\n4 1048576 [('uid', 98200, 122600), ('timestamp', 5735, 24786740), ('item_id', 50, 9390541)]\n5 1048576 [('uid', 122600, 147100), ('timestamp', 120, 24786775), ('item_id', 22, 9390541)]\n6 1048576 [('uid', 147100, 171600), ('timestamp', 140, 24786750), ('item_id', 50, 9390601)]\n7 1048576 [('uid', 171600, 195600), ('timestamp', 220, 24786745), ('item_id', 50, 9390554)]\n8 1048576 [('uid', 195600, 216500), ('timestamp', 1890, 24786770), ('item_id', 50, 9390528)]\n9 1048576 [('uid', 216500, 241800), ('timestamp', 65, 24786735), ('item_id', 26, 9390541)]\n" } } ## Step 13 · agent · 2026-09-19T00:06:26.152Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:06:33.706Z { "code": "const r = await tools.exec_command({cmd:\"sed -n '1,25p' /proc/meminfo; /opt/task-venv/bin/python - <<'PY'\\nimport pyarrow.parquet as pq, pyarrow.compute as pc, pyarrow as pa, pandas as pd, numpy as np, time\\nD='/task/data'; targets=pd.read_parquet(D+'/target_users.parquet').uid.to_numpy(); cats=pd.read_parquet(D+'/candidate_catalog.parquet').item_id.to_numpy();\\ntset=pa.array(targets); cset=pa.array(cats)\\nfor fname in ['train_listens.parquet','val_listens.parquet']:\\n p=pq.ParquetFile(D+'/'+fname); nu=set(); ni=set(); npos=ntarg=ncat=strongorg=0; tsmin=1e18;tsmax=0\\n t=time.time()\\n for b in p.iter_batches(columns=['uid','timestamp','item_id','is_organic','played_ratio_pct'],batch_size=1048576):\\n u=b.column(0); ts=b.column(1); it=b.column(2); org=b.column(3); rat=b.column(4)\\n if fname.startswith('train'):\\n nu.update(np.unique(u.to_numpy()).tolist())\\n mask=pc.is_in(u,value_set=tset); ntarg += pc.sum(mask).as_py()\\n maskcat=pc.and_(mask,pc.is_in(it,value_set=cset)); ncat += pc.sum(maskcat).as_py()\\n pos=pc.and_(maskcat,pc.greater_equal(rat,50)); npos += pc.sum(pos).as_py()\\n strong=pc.and_(maskcat,pc.and_(pc.equal(org,1),pc.greater_equal(rat,80))); strongorg += pc.sum(strong).as_py()\\n print(fname,'users',len(nu),'target rows',ntarg,'targetcat',ncat,'pos',npos,'strongorg',strongorg,'sec',time.time()-t)\\nPY\",\"workdir\":\"/app\",\"yield_time_ms\":30000,\"max_output_tokens\":10000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:06:36.777Z Script completed Wall time 3.1 seconds Output: MemTotal: 15988968 kB MemFree: 1738176 kB MemAvailable: 14848724 kB Buffers: 227940 kB Cached: 12597632 kB SwapCached: 0 kB Active: 523572 kB Inactive: 12589404 kB Active(anon): 313880 kB Inactive(anon): 0 kB Active(file): 209692 kB Inactive(file): 12589404 kB Unevictable: 43852 kB Mlocked: 27220 kB SwapTotal: 0 kB SwapFree: 0 kB Zswap: 0 kB Zswapped: 0 kB Dirty: 3392 kB Writeback: 0 kB AnonPages: 331620 kB Mapped: 458896 kB Shmem: 3040 kB KReclaimable: 647688 kB Slab: 795948 kB train_listens.parquet users 9238 target rows 43222297 targetcat 31062540 pos 19959853 strongorg 8661020 sec 1.4327528476715088 val_listens.parquet users 0 target rows 1482553 targetcat 999062 pos 650295 strongorg 288828 sec 0.04673910140991211 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd1f653f887d1aec07cdc5842798b", "usage": { "input_tokens": 22298, "cached_input_tokens": 11136, "cache_write_input_tokens": 0, "output_tokens": 838, "reasoning_output_tokens": 365, "total_tokens": 23136 }, "turn_token_usage": { "input_tokens": 137923, "cached_input_tokens": 118784, "cache_write_input_tokens": 0, "output_tokens": 2320, "reasoning_output_tokens": 666, "total_tokens": 140243 }, "thread_token_usage": { "input_tokens": 137923, "cached_input_tokens": 118784, "cache_write_input_tokens": 0, "output_tokens": 2320, "reasoning_output_tokens": 666, "total_tokens": 140243 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-18c9a244-eb98-4673-a799-771f746059b7", "process_id": "83611", "command": [ "/bin/sh", "-lc", "sed -n '1,25p' /proc/meminfo; /opt/task-venv/bin/python - <<'PY'\nimport pyarrow.parquet as pq, pyarrow.compute as pc, pyarrow as pa, pandas as pd, numpy as np, time\nD='/task/data'; targets=pd.read_parquet(D+'/target_users.parquet').uid.to_numpy(); cats=pd.read_parquet(D+'/candidate_catalog.parquet').item_id.to_numpy();\ntset=pa.array(targets); cset=pa.array(cats)\nfor fname in ['train_listens.parquet','val_listens.parquet']:\n p=pq.ParquetFile(D+'/'+fname); nu=set(); ni=set(); npos=ntarg=ncat=strongorg=0; tsmin=1e18;tsmax=0\n t=time.time()\n for b in p.iter_batches(columns=['uid','timestamp','item_id','is_organic','played_ratio_pct'],batch_size=1048576):\n u=b.column(0); ts=b.column(1); it=b.column(2); org=b.column(3); rat=b.column(4)\n if fname.startswith('train'):\n nu.update(np.unique(u.to_numpy()).tolist())\n mask=pc.is_in(u,value_set=tset); ntarg += pc.sum(mask).as_py()\n maskcat=pc.and_(mask,pc.is_in(it,value_set=cset)); ncat += pc.sum(maskcat).as_py()\n pos=pc.and_(maskcat,pc.greater_equal(rat,50)); npos += pc.sum(pos).as_py()\n strong=pc.and_(maskcat,pc.and_(pc.equal(org,1),pc.greater_equal(rat,80))); strongorg += pc.sum(strong).as_py()\n print(fname,'users',len(nu),'target rows',ntarg,'targetcat',ncat,'pos',npos,'strongorg',strongorg,'sec',time.time()-t)\nPY" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "sed -n '1,25p' /proc/meminfo; /opt/task-venv/bin/python - <<'PY'\nimport pyarrow.parquet as pq, pyarrow.compute as pc, pyarrow as pa, pandas as pd, numpy as np, time\nD='/task/data'; targets=pd.read_parquet(D+'/target_users.parquet').uid.to_numpy(); cats=pd.read_parquet(D+'/candidate_catalog.parquet').item_id.to_numpy();\ntset=pa.array(targets); cset=pa.array(cats)\nfor fname in ['train_listens.parquet','val_listens.parquet']:\n p=pq.ParquetFile(D+'/'+fname); nu=set(); ni=set(); npos=ntarg=ncat=strongorg=0; tsmin=1e18;tsmax=0\n t=time.time()\n for b in p.iter_batches(columns=['uid','timestamp','item_id','is_organic','played_ratio_pct'],batch_size=1048576):\n u=b.column(0); ts=b.column(1); it=b.column(2); org=b.column(3); rat=b.column(4)\n if fname.startswith('train'):\n nu.update(np.unique(u.to_numpy()).tolist())\n mask=pc.is_in(u,value_set=tset); ntarg += pc.sum(mask).as_py()\n maskcat=pc.and_(mask,pc.is_in(it,value_set=cset)); ncat += pc.sum(maskcat).as_py()\n pos=pc.and_(maskcat,pc.greater_equal(rat,50)); npos += pc.sum(pos).as_py()\n strong=pc.and_(maskcat,pc.and_(pc.equal(org,1),pc.greater_equal(rat,80))); strongorg += pc.sum(strong).as_py()\n print(fname,'users',len(nu),'target rows',ntarg,'targetcat',ncat,'pos',npos,'strongorg',strongorg,'sec',time.time()-t)\nPY" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "train_listens.parquet users 9238 target rows 43222297 targetcat 31062540 pos 19959853 strongorg 8661020 sec 1.4327528476715088\nval_listens.parquet users 0 target rows 1482553 targetcat 999062 pos 650295 strongorg 288828 sec 0.04673910140991211\n", "stderr": "", "aggregated_output": "train_listens.parquet users 9238 target rows 43222297 targetcat 31062540 pos 19959853 strongorg 8661020 sec 1.4327528476715088\nval_listens.parquet users 0 target rows 1482553 targetcat 999062 pos 650295 strongorg 288828 sec 0.04673910140991211\n", "exit_code": 0, "duration": { "secs": 2, "nanos": 902378995 }, "formatted_output": "train_listens.parquet users 9238 target rows 43222297 targetcat 31062540 pos 19959853 strongorg 8661020 sec 1.4327528476715088\nval_listens.parquet users 0 target rows 1482553 targetcat 999062 pos 650295 strongorg 288828 sec 0.04673910140991211\n" } } ## Step 14 · agent · 2026-09-19T00:06:53.391Z ### Thinking unavailable — no text recorded ## Step 15 · agent · 2026-09-19T00:07:08.921Z ### Thinking unavailable — no text recorded ## Step 16 · agent · 2026-09-19T00:07:14.855Z ### Thinking unavailable — no text recorded The data is unusually dense: 43.5M training listens but only 9,238 users, with 31.1M target-user/catalog interactions. That makes repeat affinity and recency especially important. I’m measuring those signals first, then I’ll use the winning weighting as the history encoding for the neural user tower rather than relying on user IDs. ### exec · 2026-09-19T00:07:40.368Z { "code": "const patch = \"*** Begin Patch\\n*** Add File: /app/solution/probe_baselines.py\\n+#!/usr/bin/env python3\\n+\\\"\\\"\\\"Development-only validation probes using history-derived signals.\\\"\\\"\\\"\\n+from pathlib import Path\\n+import numpy as np\\n+import pandas as pd\\n+import pyarrow as pa\\n+import pyarrow.compute as pc\\n+import pyarrow.parquet as pq\\n+\\n+D = Path('/task/data')\\n+OUT = Path('/app/solution')\\n+CUTOFF = 24786800\\n+DAY = 86400\\n+\\n+def collect_listens():\\n+ targets = pd.read_parquet(D/'target_users.parquet').uid.to_numpy(np.int64)\\n+ items = pd.read_parquet(D/'candidate_catalog.parquet').item_id.to_numpy(np.int64)\\n+ ts, us, it, ratio, organic = [], [], [], [], []\\n+ uvals, ivals = pa.array(targets), pa.array(items)\\n+ pf = pq.ParquetFile(D/'train_listens.parquet')\\n+ for b in pf.iter_batches(columns=['uid','timestamp','item_id','is_organic','played_ratio_pct'], batch_size=1<<20):\\n+ keep = pc.and_(pc.is_in(b.column(0), value_set=uvals), pc.is_in(b.column(2), value_set=ivals))\\n+ if pc.any(keep).as_py():\\n+ us.append(pc.filter(b.column(0),keep).to_numpy().astype(np.int32))\\n+ ts.append(pc.filter(b.column(1),keep).to_numpy().astype(np.int32))\\n+ it.append(pc.filter(b.column(2),keep).to_numpy().astype(np.int32))\\n+ organic.append(pc.filter(b.column(3),keep).to_numpy().astype(np.int8))\\n+ ratio.append(pc.filter(b.column(4),keep).to_numpy().astype(np.float32))\\n+ return pd.DataFrame({'uid':np.concatenate(us),'item_id':np.concatenate(it),\\n+ 'timestamp':np.concatenate(ts),'ratio':np.concatenate(ratio),\\n+ 'organic':np.concatenate(organic)})\\n+\\n+def aggregate(df):\\n+ p = df[df.ratio >= 50].copy()\\n+ p['cnt'] = 1.0\\n+ p['org80'] = ((p.organic == 1) & (p.ratio >= 80)).astype(np.float32)\\n+ p['r7'] = (p.timestamp >= CUTOFF-7*DAY).astype(np.float32)\\n+ p['r30'] = (p.timestamp >= CUTOFF-30*DAY).astype(np.float32)\\n+ p['r90'] = (p.timestamp >= CUTOFF-90*DAY).astype(np.float32)\\n+ return p.groupby(['uid','item_id'],sort=False,observed=True).agg(\\n+ cnt=('cnt','sum'),org80=('org80','sum'),r7=('r7','sum'),r30=('r30','sum'),r90=('r90','sum'),last=('timestamp','max')).reset_index()\\n+\\n+def labels():\\n+ z=np.load(D/'validation_eligible_candidates.npz'); uids=z['uids'].astype(np.int64); items=z['item_ids'].astype(np.int64)\\n+ ur={int(x):i for i,x in enumerate(uids)}; ic={int(x):i for i,x in enumerate(items)}\\n+ def elig(u,i):\\n+ r=ur.get(int(u)); c=ic.get(int(i)); return r is not None and c is not None and ((int(z['packed_eligible'][r,c//8])>>(c%8))&1)\\n+ gold={}\\n+ l=pd.read_parquet(D/'val_listens.parquet',columns=['uid','item_id','is_organic','played_ratio_pct'])\\n+ for u,i in l[(l.is_organic==1)&(l.played_ratio_pct>=80)][['uid','item_id']].drop_duplicates().itertuples(index=False,name=None):\\n+ if elig(u,i): gold.setdefault(int(u),{})[int(i)]=1\\n+ l=pd.read_parquet(D/'val_likes.parquet',columns=['uid','item_id','is_organic'])\\n+ for u,i in l[l.is_organic==1][['uid','item_id']].drop_duplicates().itertuples(index=False,name=None):\\n+ if elig(u,i): gold.setdefault(int(u),{})[int(i)]=3\\n+ return z,uids,items,gold\\n+\\n+def main():\\n+ cache=OUT/'history_agg.parquet'\\n+ if cache.exists(): agg=pd.read_parquet(cache)\\n+ else:\\n+ agg=aggregate(collect_listens()); agg.to_parquet(cache,index=False)\\n+ z,uids,items,gold=labels(); pop=pd.read_parquet(D/'candidate_catalog.parquet').set_index('item_id')\\n+ popscore={int(i):-np.log1p(float(r)) for i,r in pop.popularity_rank.items()}\\n+ groups={int(u):g for u,g in agg.groupby('uid',sort=False)}\\n+ variants={\\n+ 'pop': (0,0,0,0,0),\\n+ 'count': (1,0,0,0,0.03),\\n+ 'recent': (.3,.7,1.5,3,.03),\\n+ 'recent2': (.15,.5,1.5,4,.02),\\n+ 'org': (.2,.5,1,3,.03),\\n+ }\\n+ discounts=1/np.log2(np.arange(2,12)); results={k:[] for k in variants}; rankings={k:[] for k in variants}\\n+ for ri,u in enumerate(uids):\\n+ mask=np.unpackbits(z['packed_eligible'][ri],count=len(items),bitorder='little').astype(bool)\\n+ eligible=items[mask]; base=np.array([popscore[int(i)] for i in eligible],np.float32)\\n+ pos={int(x):j for j,x in enumerate(eligible)}\\n+ g=groups.get(int(u))\\n+ feats={}\\n+ if g is not None:\\n+ for row in g.itertuples(index=False):\\n+ j=pos.get(int(row.item_id))\\n+ if j is not None: feats[j]=row\\n+ for name,(wc,w90,w30,w7,wp) in variants.items():\\n+ s=wp*base\\n+ if feats:\\n+ s=s.copy()\\n+ for j,r in feats.items():\\n+ s[j]+=wc*np.log1p(r.cnt)+w90*np.log1p(r.r90)+w30*np.log1p(r.r30)+w7*np.log1p(r.r7)+.2*np.log1p(r.org80)\\n+ top=np.argpartition(-s,99)[:100]; top=top[np.argsort(-s[top],kind='stable')]; ranked=eligible[top]\\n+ rankings[name].extend((int(u),int(i),rank+1) for rank,i in enumerate(ranked))\\n+ gd=gold.get(int(u))\\n+ if gd:\\n+ gains=np.array([gd.get(int(i),0) for i in ranked[:10]])\\n+ ideal=np.array(sorted(gd.values(),reverse=True)[:10])\\n+ results[name].append(((2**gains-1)*discounts[:len(gains)]).sum()/((2**ideal-1)*discounts[:len(ideal)]).sum())\\n+ for name,v in results.items():\\n+ score=float(np.mean(v)); print(name,score,len(v))\\n+ pd.DataFrame(rankings[name],columns=['uid','item_id','rank']).to_parquet(OUT/f'validation_{name}.parquet',index=False)\\n+\\n+if __name__=='__main__': main()\\n*** End Patch\";\ntext(await tools.apply_patch(patch));\n" } ### Tool output · 2026-09-19T00:07:40.427Z Script completed Wall time 0.0 seconds Output: {} ### Harness context { "type": "codex_item_completed", "item": { "type": "FileChange", "id": "exec-63112eb0-5376-4832-af70-69af14ed9757", "changes": { "/app/solution/probe_baselines.py": { "type": "add", "content": "#!/usr/bin/env python3\n\"\"\"Development-only validation probes using history-derived signals.\"\"\"\nfrom pathlib import Path\nimport numpy as np\nimport pandas as pd\nimport pyarrow as pa\nimport pyarrow.compute as pc\nimport pyarrow.parquet as pq\n\nD = Path('/task/data')\nOUT = Path('/app/solution')\nCUTOFF = 24786800\nDAY = 86400\n\ndef collect_listens():\n targets = pd.read_parquet(D/'target_users.parquet').uid.to_numpy(np.int64)\n items = pd.read_parquet(D/'candidate_catalog.parquet').item_id.to_numpy(np.int64)\n ts, us, it, ratio, organic = [], [], [], [], []\n uvals, ivals = pa.array(targets), pa.array(items)\n pf = pq.ParquetFile(D/'train_listens.parquet')\n for b in pf.iter_batches(columns=['uid','timestamp','item_id','is_organic','played_ratio_pct'], batch_size=1<<20):\n keep = pc.and_(pc.is_in(b.column(0), value_set=uvals), pc.is_in(b.column(2), value_set=ivals))\n if pc.any(keep).as_py():\n us.append(pc.filter(b.column(0),keep).to_numpy().astype(np.int32))\n ts.append(pc.filter(b.column(1),keep).to_numpy().astype(np.int32))\n it.append(pc.filter(b.column(2),keep).to_numpy().astype(np.int32))\n organic.append(pc.filter(b.column(3),keep).to_numpy().astype(np.int8))\n ratio.append(pc.filter(b.column(4),keep).to_numpy().astype(np.float32))\n return pd.DataFrame({'uid':np.concatenate(us),'item_id':np.concatenate(it),\n 'timestamp':np.concatenate(ts),'ratio':np.concatenate(ratio),\n 'organic':np.concatenate(organic)})\n\ndef aggregate(df):\n p = df[df.ratio >= 50].copy()\n p['cnt'] = 1.0\n p['org80'] = ((p.organic == 1) & (p.ratio >= 80)).astype(np.float32)\n p['r7'] = (p.timestamp >= CUTOFF-7*DAY).astype(np.float32)\n p['r30'] = (p.timestamp >= CUTOFF-30*DAY).astype(np.float32)\n p['r90'] = (p.timestamp >= CUTOFF-90*DAY).astype(np.float32)\n return p.groupby(['uid','item_id'],sort=False,observed=True).agg(\n cnt=('cnt','sum'),org80=('org80','sum'),r7=('r7','sum'),r30=('r30','sum'),r90=('r90','sum'),last=('timestamp','max')).reset_index()\n\ndef labels():\n z=np.load(D/'validation_eligible_candidates.npz'); uids=z['uids'].astype(np.int64); items=z['item_ids'].astype(np.int64)\n ur={int(x):i for i,x in enumerate(uids)}; ic={int(x):i for i,x in enumerate(items)}\n def elig(u,i):\n r=ur.get(int(u)); c=ic.get(int(i)); return r is not None and c is not None and ((int(z['packed_eligible'][r,c//8])>>(c%8))&1)\n gold={}\n l=pd.read_parquet(D/'val_listens.parquet',columns=['uid','item_id','is_organic','played_ratio_pct'])\n for u,i in l[(l.is_organic==1)&(l.played_ratio_pct>=80)][['uid','item_id']].drop_duplicates().itertuples(index=False,name=None):\n if elig(u,i): gold.setdefault(int(u),{})[int(i)]=1\n l=pd.read_parquet(D/'val_likes.parquet',columns=['uid','item_id','is_organic'])\n for u,i in l[l.is_organic==1][['uid','item_id']].drop_duplicates().itertuples(index=False,name=None):\n if elig(u,i): gold.setdefault(int(u),{})[int(i)]=3\n return z,uids,items,gold\n\ndef main():\n cache=OUT/'history_agg.parquet'\n if cache.exists(): agg=pd.read_parquet(cache)\n else:\n agg=aggregate(collect_listens()); agg.to_parquet(cache,index=False)\n z,uids,items,gold=labels(); pop=pd.read_parquet(D/'candidate_catalog.parquet').set_index('item_id')\n popscore={int(i):-np.log1p(float(r)) for i,r in pop.popularity_rank.items()}\n groups={int(u):g for u,g in agg.groupby('uid',sort=False)}\n variants={\n 'pop': (0,0,0,0,0),\n 'count': (1,0,0,0,0.03),\n 'recent': (.3,.7,1.5,3,.03),\n 'recent2': (.15,.5,1.5,4,.02),\n 'org': (.2,.5,1,3,.03),\n }\n discounts=1/np.log2(np.arange(2,12)); results={k:[] for k in variants}; rankings={k:[] for k in variants}\n for ri,u in enumerate(uids):\n mask=np.unpackbits(z['packed_eligible'][ri],count=len(items),bitorder='little').astype(bool)\n eligible=items[mask]; base=np.array([popscore[int(i)] for i in eligible],np.float32)\n pos={int(x):j for j,x in enumerate(eligible)}\n g=groups.get(int(u))\n feats={}\n if g is not None:\n for row in g.itertuples(index=False):\n j=pos.get(int(row.item_id))\n if j is not None: feats[j]=row\n for name,(wc,w90,w30,w7,wp) in variants.items():\n s=wp*base\n if feats:\n s=s.copy()\n for j,r in feats.items():\n s[j]+=wc*np.log1p(r.cnt)+w90*np.log1p(r.r90)+w30*np.log1p(r.r30)+w7*np.log1p(r.r7)+.2*np.log1p(r.org80)\n top=np.argpartition(-s,99)[:100]; top=top[np.argsort(-s[top],kind='stable')]; ranked=eligible[top]\n rankings[name].extend((int(u),int(i),rank+1) for rank,i in enumerate(ranked))\n gd=gold.get(int(u))\n if gd:\n gains=np.array([gd.get(int(i),0) for i in ranked[:10]])\n ideal=np.array(sorted(gd.values(),reverse=True)[:10])\n results[name].append(((2**gains-1)*discounts[:len(gains)]).sum()/((2**ideal-1)*discounts[:len(ideal)]).sum())\n for name,v in results.items():\n score=float(np.mean(v)); print(name,score,len(v))\n pd.DataFrame(rankings[name],columns=['uid','item_id','rank']).to_parquet(OUT/f'validation_{name}.parquet',index=False)\n\nif __name__=='__main__': main()\n" } }, "status": "completed", "stdout": "Success. Updated the following files:\nA /app/solution/probe_baselines.py\n", "stderr": "" } } ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd20cef1887d19346a0dc9ff6e84c", "usage": { "input_tokens": 23489, "cached_input_tokens": 22144, "cache_write_input_tokens": 0, "output_tokens": 3165, "reasoning_output_tokens": 1245, "total_tokens": 26654 }, "turn_token_usage": { "input_tokens": 161412, "cached_input_tokens": 140928, "cache_write_input_tokens": 0, "output_tokens": 5485, "reasoning_output_tokens": 1911, "total_tokens": 166897 }, "thread_token_usage": { "input_tokens": 161412, "cached_input_tokens": 140928, "cache_write_input_tokens": 0, "output_tokens": 5485, "reasoning_output_tokens": 1911, "total_tokens": 166897 } } ## Step 17 · agent · 2026-09-19T00:07:43.037Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:07:44.512Z { "code": "const r = await tools.exec_command({cmd:\"ls -l /app/solution && /opt/task-venv/bin/python /app/solution/probe_baselines.py\",\"workdir\":\"/app\",\"yield_time_ms\":30000,\"max_output_tokens\":20000}); text(r.output); if(r.session_id) text(`SESSION_ID=${r.session_id}`);\n" } ### Tool output · 2026-09-19T00:08:14.679Z Script completed Wall time 30.2 seconds Output: total 8 -rw-r--r-- 1 agent agent 5354 Sep 19 00:07 probe_baselines.py SESSION_ID=55511 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd24cba0887d1b2a822c86f05b992", "usage": { "input_tokens": 26678, "cached_input_tokens": 21504, "cache_write_input_tokens": 0, "output_tokens": 102, "reasoning_output_tokens": 16, "total_tokens": 26780 }, "turn_token_usage": { "input_tokens": 188090, "cached_input_tokens": 162432, "cache_write_input_tokens": 0, "output_tokens": 5587, "reasoning_output_tokens": 1927, "total_tokens": 193677 }, "thread_token_usage": { "input_tokens": 188090, "cached_input_tokens": 162432, "cache_write_input_tokens": 0, "output_tokens": 5587, "reasoning_output_tokens": 1927, "total_tokens": 193677 } } ## Step 18 · agent · 2026-09-19T00:08:16.024Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:08:16.697Z { "code": "const r = await tools.write_stdin({session_id:55511,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:08:46.705Z Script completed Wall time 30.0 seconds Output: ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd26eefb887d1b8f0ea143ebf5c8e", "usage": { "input_tokens": 26837, "cached_input_tokens": 26496, "cache_write_input_tokens": 0, "output_tokens": 55, "reasoning_output_tokens": 8, "total_tokens": 26892 }, "turn_token_usage": { "input_tokens": 214927, "cached_input_tokens": 188928, "cache_write_input_tokens": 0, "output_tokens": 5642, "reasoning_output_tokens": 1935, "total_tokens": 220569 }, "thread_token_usage": { "input_tokens": 214927, "cached_input_tokens": 188928, "cache_write_input_tokens": 0, "output_tokens": 5642, "reasoning_output_tokens": 1935, "total_tokens": 220569 } } ## Step 19 · agent · 2026-09-19T00:08:48.271Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:08:48.941Z { "code": "const r = await tools.write_stdin({session_id:55511,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:09:18.950Z Script completed Wall time 30.0 seconds Output: ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd28efacc87d1ad93d128ef6aeb36", "usage": { "input_tokens": 26915, "cached_input_tokens": 26624, "cache_write_input_tokens": 0, "output_tokens": 53, "reasoning_output_tokens": 6, "total_tokens": 26968 }, "turn_token_usage": { "input_tokens": 241842, "cached_input_tokens": 215552, "cache_write_input_tokens": 0, "output_tokens": 5695, "reasoning_output_tokens": 1941, "total_tokens": 247537 }, "thread_token_usage": { "input_tokens": 241842, "cached_input_tokens": 215552, "cache_write_input_tokens": 0, "output_tokens": 5695, "reasoning_output_tokens": 1941, "total_tokens": 247537 } } ## Step 20 · agent · 2026-09-19T00:09:20.564Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:09:21.229Z { "code": "const r = await tools.write_stdin({session_id:55511,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:09:51.237Z Script completed Wall time 30.0 seconds Output: ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd2af2f4087d188ce819130d37cb6", "usage": { "input_tokens": 26991, "cached_input_tokens": 26752, "cache_write_input_tokens": 0, "output_tokens": 60, "reasoning_output_tokens": 13, "total_tokens": 27051 }, "turn_token_usage": { "input_tokens": 268833, "cached_input_tokens": 242304, "cache_write_input_tokens": 0, "output_tokens": 5755, "reasoning_output_tokens": 1954, "total_tokens": 274588 }, "thread_token_usage": { "input_tokens": 268833, "cached_input_tokens": 242304, "cache_write_input_tokens": 0, "output_tokens": 5755, "reasoning_output_tokens": 1954, "total_tokens": 274588 } } ## Step 21 · agent · 2026-09-19T00:09:54.973Z ### Thinking unavailable — no text recorded The first aggregation pass is still running over the 31M in-catalog events; it is intentionally writing only the compact per-user/per-item history table under `solution/`. Once cached, parameter probes and neural training can reuse it without rescanning the raw logs. ### exec · 2026-09-19T00:09:56.821Z { "code": "const r = await tools.write_stdin({session_id:55511,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:10:26.830Z Script completed Wall time 30.0 seconds Output: ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd2cfc7dc87d1b2669de81dc42ea5", "usage": { "input_tokens": 27074, "cached_input_tokens": 23296, "cache_write_input_tokens": 0, "output_tokens": 120, "reasoning_output_tokens": 13, "total_tokens": 27194 }, "turn_token_usage": { "input_tokens": 295907, "cached_input_tokens": 265600, "cache_write_input_tokens": 0, "output_tokens": 5875, "reasoning_output_tokens": 1967, "total_tokens": 301782 }, "thread_token_usage": { "input_tokens": 295907, "cached_input_tokens": 265600, "cache_write_input_tokens": 0, "output_tokens": 5875, "reasoning_output_tokens": 1967, "total_tokens": 301782 } } ## Step 22 · agent · 2026-09-19T00:10:29.622Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:10:30.786Z { "code": "const r = await tools.exec_command({cmd:\"ps -o pid,etime,rss,pcpu,stat,cmd -C python\",\"workdir\":\"/app\",\"yield_time_ms\":10000,\"max_output_tokens\":10000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:10:30.848Z Script completed Wall time 0.0 seconds Output: /bin/sh: 1: ps: not found ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-0be1f5b7-9782-4a21-a496-a8a868018b3b", "process_id": "6383", "command": [ "/bin/sh", "-lc", "ps -o pid,etime,rss,pcpu,stat,cmd -C python" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "ps -o pid,etime,rss,pcpu,stat,cmd -C python" } ], "source": "unified_exec_startup", "status": "failed", "stdout": "/bin/sh: 1: ps: not found\n", "stderr": "", "aggregated_output": "/bin/sh: 1: ps: not found\n", "exit_code": 127, "duration": { "secs": 0, "nanos": 5500 }, "formatted_output": "/bin/sh: 1: ps: not found\n" } } ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd2f30ffc87d1933de8b11d6f2c7f", "usage": { "input_tokens": 27217, "cached_input_tokens": 26752, "cache_write_input_tokens": 0, "output_tokens": 84, "reasoning_output_tokens": 19, "total_tokens": 27301 }, "turn_token_usage": { "input_tokens": 323124, "cached_input_tokens": 292352, "cache_write_input_tokens": 0, "output_tokens": 5959, "reasoning_output_tokens": 1986, "total_tokens": 329083 }, "thread_token_usage": { "input_tokens": 323124, "cached_input_tokens": 292352, "cache_write_input_tokens": 0, "output_tokens": 5959, "reasoning_output_tokens": 1986, "total_tokens": 329083 } } ## Step 23 · agent · 2026-09-19T00:10:33.189Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:10:33.689Z { "code": "const r = await tools.write_stdin({session_id:55511,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:11:03.697Z Script completed Wall time 30.0 seconds Output: ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd2f730c887d1971f8e75c7482374", "usage": { "input_tokens": 27335, "cached_input_tokens": 27008, "cache_write_input_tokens": 0, "output_tokens": 53, "reasoning_output_tokens": 6, "total_tokens": 27388 }, "turn_token_usage": { "input_tokens": 350459, "cached_input_tokens": 319360, "cache_write_input_tokens": 0, "output_tokens": 6012, "reasoning_output_tokens": 1992, "total_tokens": 356471 }, "thread_token_usage": { "input_tokens": 350459, "cached_input_tokens": 319360, "cache_write_input_tokens": 0, "output_tokens": 6012, "reasoning_output_tokens": 1992, "total_tokens": 356471 } } ## Step 24 · agent · 2026-09-19T00:11:06.034Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:11:06.545Z { "code": "const r = await tools.exec_command({cmd:\"ls -lh /app/solution\",\"workdir\":\"/app\",\"yield_time_ms\":10000,\"max_output_tokens\":10000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:11:06.593Z Script completed Wall time 0.0 seconds Output: total 46M -rw-r--r-- 1 agent agent 46M Sep 19 00:07 history_agg.parquet -rw-r--r-- 1 agent agent 5.3K Sep 19 00:07 probe_baselines.py ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-f00c8709-97e7-4b8c-afa5-0eaba739c626", "process_id": "39469", "command": [ "/bin/sh", "-lc", "ls -lh /app/solution" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "list_files", "cmd": "ls -lh /app/solution", "path": "solution" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "total 46M\n-rw-r--r-- 1 agent agent 46M Sep 19 00:07 history_agg.parquet\n-rw-r--r-- 1 agent agent 5.3K Sep 19 00:07 probe_baselines.py\n", "stderr": "", "aggregated_output": "total 46M\n-rw-r--r-- 1 agent agent 46M Sep 19 00:07 history_agg.parquet\n-rw-r--r-- 1 agent agent 5.3K Sep 19 00:07 probe_baselines.py\n", "exit_code": 0, "duration": { "secs": 0, "nanos": 4540 }, "formatted_output": "total 46M\n-rw-r--r-- 1 agent agent 46M Sep 19 00:07 history_agg.parquet\n-rw-r--r-- 1 agent agent 5.3K Sep 19 00:07 probe_baselines.py\n" } } ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd3180eec87d1a5d651d604e1d865", "usage": { "input_tokens": 27411, "cached_input_tokens": 26880, "cache_write_input_tokens": 0, "output_tokens": 89, "reasoning_output_tokens": 35, "total_tokens": 27500 }, "turn_token_usage": { "input_tokens": 377870, "cached_input_tokens": 346240, "cache_write_input_tokens": 0, "output_tokens": 6101, "reasoning_output_tokens": 2027, "total_tokens": 383971 }, "thread_token_usage": { "input_tokens": 377870, "cached_input_tokens": 346240, "cache_write_input_tokens": 0, "output_tokens": 6101, "reasoning_output_tokens": 2027, "total_tokens": 383971 } } ## Step 25 · agent · 2026-09-19T00:11:13.618Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:11:13.865Z { "code": "const r = await tools.write_stdin({session_id:55511,chars:\"\\u0003\",yield_time_ms:1000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:11:13.943Z Script completed Wall time 0.1 seconds Output: Traceback (most recent call last): File "/app/solution/probe_baselines.py", line 100, in if __name__=='__main__': main() ^^^^^^ File "/app/solution/probe_baselines.py", line 62, in main z,uids,items,gold=labels(); pop=pd.read_parquet(D/'candidate_catalog.parquet').set_index('item_id') ^^^^^^^^ File "/app/solution/probe_baselines.py", line 51, in labels if elig(u,i): gold.setdefault(int(u),{})[int(i)]=1 ^^^^^^^^^ File "/app/solution/probe_baselines.py", line 47, in elig r=ur.get(int(u)); c=ic.get(int(i)); return r is not None and c is not None and ((int(z['packed_eligible'][r,c//8])>>(c%8))&1) ~^^^^^^^^^^^^^^^^^^^ File "/opt/task-venv/lib/python3.12/site-packages/numpy/lib/_npyio_impl.py", line 254, in __getitem__ return format.read_array(bytes, ^^^^^^^^^^^^^^^^^^^^^^^^ File "/opt/task-venv/lib/python3.12/site-packages/numpy/lib/format.py", line 851, in read_array data = _read_bytes(fp, read_size, "array data") ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/opt/task-venv/lib/python3.12/site-packages/numpy/lib/format.py", line 986, in _read_bytes r = fp.read(size - len(data)) ^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.12/zipfile/__init__.py", line 1008, in read data = self._read1(n) ^^^^^^^^^^^^^^ File "/usr/local/lib/python3.12/zipfile/__init__.py", line 1084, in _read1 data = self._decompressor.decompress(data, n) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ KeyboardInterrupt ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd31ae05487d1996830c300c87c6e", "usage": { "input_tokens": 27582, "cached_input_tokens": 27264, "cache_write_input_tokens": 0, "output_tokens": 209, "reasoning_output_tokens": 158, "total_tokens": 27791 }, "turn_token_usage": { "input_tokens": 405452, "cached_input_tokens": 373504, "cache_write_input_tokens": 0, "output_tokens": 6310, "reasoning_output_tokens": 2185, "total_tokens": 411762 }, "thread_token_usage": { "input_tokens": 405452, "cached_input_tokens": 373504, "cache_write_input_tokens": 0, "output_tokens": 6310, "reasoning_output_tokens": 2185, "total_tokens": 411762 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-6aee634a-7ae6-484a-a189-9603c96b3b65", "process_id": "55511", "command": [ "/bin/sh", "-lc", "ls -l /app/solution && /opt/task-venv/bin/python /app/solution/probe_baselines.py" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "ls -l /app/solution && /opt/task-venv/bin/python /app/solution/probe_baselines.py" } ], "source": "unified_exec_startup", "status": "failed", "stdout": "Traceback (most recent call last):\n File \"/app/solution/probe_baselines.py\", line 100, in \n if __name__=='__main__': main()\n ^^^^^^\n File \"/app/solution/probe_baselines.py\", line 62, in main\n z,uids,items,gold=labels(); pop=pd.read_parquet(D/'candidate_catalog.parquet').set_index('item_id')\n ^^^^^^^^\n File \"/app/solution/probe_baselines.py\", line 51, in labels\n if elig(u,i): gold.setdefault(int(u),{})[int(i)]=1\n ^^^^^^^^^\n File \"/app/solution/probe_baselines.py\", line 47, in elig\n r=ur.get(int(u)); c=ic.get(int(i)); return r is not None and c is not None and ((int(z['packed_eligible'][r,c//8])>>(c%8))&1)\n ~^^^^^^^^^^^^^^^^^^^\n File \"/opt/task-venv/lib/python3.12/site-packages/numpy/lib/_npyio_impl.py\", line 254, in __getitem__\n return format.read_array(bytes,\n ^^^^^^^^^^^^^^^^^^^^^^^^\n File \"/opt/task-venv/lib/python3.12/site-packages/numpy/lib/format.py\", line 851, in read_array\n data = _read_bytes(fp, read_size, \"array data\")\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n File \"/opt/task-venv/lib/python3.12/site-packages/numpy/lib/format.py\", line 986, in _read_bytes\n r = fp.read(size - len(data))\n ^^^^^^^^^^^^^^^^^^^^^^^^^\n File \"/usr/local/lib/python3.12/zipfile/__init__.py\", line 1008, in read\n data = self._read1(n)\n ^^^^^^^^^^^^^^\n File \"/usr/local/lib/python3.12/zipfile/__init__.py\", line 1084, in _read1\n data = self._decompressor.decompress(data, n)\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\nKeyboardInterrupt\n", "stderr": "", "aggregated_output": "Traceback (most recent call last):\n File \"/app/solution/probe_baselines.py\", line 100, in \n if __name__=='__main__': main()\n ^^^^^^\n File \"/app/solution/probe_baselines.py\", line 62, in main\n z,uids,items,gold=labels(); pop=pd.read_parquet(D/'candidate_catalog.parquet').set_index('item_id')\n ^^^^^^^^\n File \"/app/solution/probe_baselines.py\", line 51, in labels\n if elig(u,i): gold.setdefault(int(u),{})[int(i)]=1\n ^^^^^^^^^\n File \"/app/solution/probe_baselines.py\", line 47, in elig\n r=ur.get(int(u)); c=ic.get(int(i)); return r is not None and c is not None and ((int(z['packed_eligible'][r,c//8])>>(c%8))&1)\n ~^^^^^^^^^^^^^^^^^^^\n File \"/opt/task-venv/lib/python3.12/site-packages/numpy/lib/_npyio_impl.py\", line 254, in __getitem__\n return format.read_array(bytes,\n ^^^^^^^^^^^^^^^^^^^^^^^^\n File \"/opt/task-venv/lib/python3.12/site-packages/numpy/lib/format.py\", line 851, in read_array\n data = _read_bytes(fp, read_size, \"array data\")\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n File \"/opt/task-venv/lib/python3.12/site-packages/numpy/lib/format.py\", line 986, in _read_bytes\n r = fp.read(size - len(data))\n ^^^^^^^^^^^^^^^^^^^^^^^^^\n File \"/usr/local/lib/python3.12/zipfile/__init__.py\", line 1008, in read\n data = self._read1(n)\n ^^^^^^^^^^^^^^\n File \"/usr/local/lib/python3.12/zipfile/__init__.py\", line 1084, in _read1\n data = self._decompressor.decompress(data, n)\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\nKeyboardInterrupt\n", "exit_code": 130, "duration": { "secs": 209, "nanos": 264120848 }, "formatted_output": "Traceback (most recent call last):\n File \"/app/solution/probe_baselines.py\", line 100, in \n if __name__=='__main__': main()\n ^^^^^^\n File \"/app/solution/probe_baselines.py\", line 62, in main\n z,uids,items,gold=labels(); pop=pd.read_parquet(D/'candidate_catalog.parquet').set_index('item_id')\n ^^^^^^^^\n File \"/app/solution/probe_baselines.py\", line 51, in labels\n if elig(u,i): gold.setdefault(int(u),{})[int(i)]=1\n ^^^^^^^^^\n File \"/app/solution/probe_baselines.py\", line 47, in elig\n r=ur.get(int(u)); c=ic.get(int(i)); return r is not None and c is not None and ((int(z['packed_eligible'][r,c//8])>>(c%8))&1)\n ~^^^^^^^^^^^^^^^^^^^\n File \"/opt/task-venv/lib/python3.12/site-packages/numpy/lib/_npyio_impl.py\", line 254, in __getitem__\n return format.read_array(bytes,\n ^^^^^^^^^^^^^^^^^^^^^^^^\n File \"/opt/task-venv/lib/python3.12/site-packages/numpy/lib/format.py\", line 851, in read_array\n data = _read_bytes(fp, read_size, \"array data\")\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n File \"/opt/task-venv/lib/python3.12/site-packages/numpy/lib/format.py\", line 986, in _read_bytes\n r = fp.read(size - len(data))\n ^^^^^^^^^^^^^^^^^^^^^^^^^\n File \"/usr/local/lib/python3.12/zipfile/__init__.py\", line 1008, in read\n data = self._read1(n)\n ^^^^^^^^^^^^^^\n File \"/usr/local/lib/python3.12/zipfile/__init__.py\", line 1084, in _read1\n data = self._decompressor.decompress(data, n)\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\nKeyboardInterrupt\n" } } ## Step 26 · agent · 2026-09-19T00:11:16.108Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:11:27.925Z { "code": "const patch = \"*** Begin Patch\\n*** Update File: /app/solution/probe_baselines.py\\n@@\\n def labels():\\n- z=np.load(D/'validation_eligible_candidates.npz'); uids=z['uids'].astype(np.int64); items=z['item_ids'].astype(np.int64)\\n+ raw=np.load(D/'validation_eligible_candidates.npz'); uids=raw['uids'].astype(np.int64); items=raw['item_ids'].astype(np.int64); packed=raw['packed_eligible'].copy()\\n@@\\n- r=ur.get(int(u)); c=ic.get(int(i)); return r is not None and c is not None and ((int(z['packed_eligible'][r,c//8])>>(c%8))&1)\\n+ r=ur.get(int(u)); c=ic.get(int(i)); return r is not None and c is not None and ((int(packed[r,c//8])>>(c%8))&1)\\n@@\\n- return z,uids,items,gold\\n+ return packed,uids,items,gold\\n@@\\n- z,uids,items,gold=labels(); pop=pd.read_parquet(D/'candidate_catalog.parquet').set_index('item_id')\\n- popscore={int(i):-np.log1p(float(r)) for i,r in pop.popularity_rank.items()}\\n+ packed,uids,items,gold=labels(); pop=pd.read_parquet(D/'candidate_catalog.parquet').set_index('item_id').loc[items]\\n+ popscore=-np.log1p(pop.popularity_rank.to_numpy(np.float32))\\n+ item_col={int(x):i for i,x in enumerate(items)}\\n+ agg['col']=agg.item_id.map(item_col)\\n@@\\n- mask=np.unpackbits(z['packed_eligible'][ri],count=len(items),bitorder='little').astype(bool)\\n- eligible=items[mask]; base=np.array([popscore[int(i)] for i in eligible],np.float32)\\n- pos={int(x):j for j,x in enumerate(eligible)}\\n+ mask=np.unpackbits(packed[ri],count=len(items),bitorder='little').astype(bool)\\n@@\\n- for row in g.itertuples(index=False):\\n- j=pos.get(int(row.item_id))\\n- if j is not None: feats[j]=row\\n+ for row in g.itertuples(index=False):\\n+ j=int(row.col)\\n+ if mask[j]: feats[j]=row\\n@@\\n- s=wp*base\\n+ s=wp*popscore\\n@@\\n- top=np.argpartition(-s,99)[:100]; top=top[np.argsort(-s[top],kind='stable')]; ranked=eligible[top]\\n+ s=np.where(mask,s,-np.inf)\\n+ top=np.argpartition(-s,99)[:100]; top=top[np.argsort(-s[top],kind='stable')]; ranked=items[top]\\n*** End Patch\";\ntext(await tools.apply_patch(patch));\n" } ### Tool output · 2026-09-19T00:11:27.985Z Script completed Wall time 0.0 seconds Output: {} ### Harness context { "type": "codex_item_completed", "item": { "type": "FileChange", "id": "exec-2de07655-cf41-448e-a994-19cf9ea8b561", "changes": { "/app/solution/probe_baselines.py": { "type": "update", "unified_diff": "@@ -43,6 +43,6 @@\n def labels():\n- z=np.load(D/'validation_eligible_candidates.npz'); uids=z['uids'].astype(np.int64); items=z['item_ids'].astype(np.int64)\n+ raw=np.load(D/'validation_eligible_candidates.npz'); uids=raw['uids'].astype(np.int64); items=raw['item_ids'].astype(np.int64); packed=raw['packed_eligible'].copy()\n ur={int(x):i for i,x in enumerate(uids)}; ic={int(x):i for i,x in enumerate(items)}\n def elig(u,i):\n- r=ur.get(int(u)); c=ic.get(int(i)); return r is not None and c is not None and ((int(z['packed_eligible'][r,c//8])>>(c%8))&1)\n+ r=ur.get(int(u)); c=ic.get(int(i)); return r is not None and c is not None and ((int(packed[r,c//8])>>(c%8))&1)\n gold={}\n@@ -54,3 +54,3 @@\n if elig(u,i): gold.setdefault(int(u),{})[int(i)]=3\n- return z,uids,items,gold\n+ return packed,uids,items,gold\n \n@@ -61,4 +61,6 @@\n agg=aggregate(collect_listens()); agg.to_parquet(cache,index=False)\n- z,uids,items,gold=labels(); pop=pd.read_parquet(D/'candidate_catalog.parquet').set_index('item_id')\n- popscore={int(i):-np.log1p(float(r)) for i,r in pop.popularity_rank.items()}\n+ packed,uids,items,gold=labels(); pop=pd.read_parquet(D/'candidate_catalog.parquet').set_index('item_id').loc[items]\n+ popscore=-np.log1p(pop.popularity_rank.to_numpy(np.float32))\n+ item_col={int(x):i for i,x in enumerate(items)}\n+ agg['col']=agg.item_id.map(item_col)\n groups={int(u):g for u,g in agg.groupby('uid',sort=False)}\n@@ -73,5 +75,3 @@\n for ri,u in enumerate(uids):\n- mask=np.unpackbits(z['packed_eligible'][ri],count=len(items),bitorder='little').astype(bool)\n- eligible=items[mask]; base=np.array([popscore[int(i)] for i in eligible],np.float32)\n- pos={int(x):j for j,x in enumerate(eligible)}\n+ mask=np.unpackbits(packed[ri],count=len(items),bitorder='little').astype(bool)\n g=groups.get(int(u))\n@@ -80,6 +80,6 @@\n for row in g.itertuples(index=False):\n- j=pos.get(int(row.item_id))\n- if j is not None: feats[j]=row\n+ j=int(row.col)\n+ if mask[j]: feats[j]=row\n for name,(wc,w90,w30,w7,wp) in variants.items():\n- s=wp*base\n+ s=wp*popscore\n if feats:\n@@ -88,3 +88,4 @@\n s[j]+=wc*np.log1p(r.cnt)+w90*np.log1p(r.r90)+w30*np.log1p(r.r30)+w7*np.log1p(r.r7)+.2*np.log1p(r.org80)\n- top=np.argpartition(-s,99)[:100]; top=top[np.argsort(-s[top],kind='stable')]; ranked=eligible[top]\n+ s=np.where(mask,s,-np.inf)\n+ top=np.argpartition(-s,99)[:100]; top=top[np.argsort(-s[top],kind='stable')]; ranked=items[top]\n rankings[name].extend((int(u),int(i),rank+1) for rank,i in enumerate(ranked))\n", "move_path": null } }, "status": "completed", "stdout": "Success. Updated the following files:\nM /app/solution/probe_baselines.py\n", "stderr": "" } } ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd322417c87d1b57355a2f8edbe52", "usage": { "input_tokens": 28277, "cached_input_tokens": 27392, "cache_write_input_tokens": 0, "output_tokens": 722, "reasoning_output_tokens": 31, "total_tokens": 28999 }, "turn_token_usage": { "input_tokens": 433729, "cached_input_tokens": 400896, "cache_write_input_tokens": 0, "output_tokens": 7032, "reasoning_output_tokens": 2216, "total_tokens": 440761 }, "thread_token_usage": { "input_tokens": 433729, "cached_input_tokens": 400896, "cache_write_input_tokens": 0, "output_tokens": 7032, "reasoning_output_tokens": 2216, "total_tokens": 440761 } } ## Step 27 · agent · 2026-09-19T00:11:29.710Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:11:32.181Z { "code": "const r = await tools.exec_command({cmd:\"/opt/task-venv/bin/python /app/solution/probe_baselines.py\",\"workdir\":\"/app\",\"yield_time_ms\":30000,\"max_output_tokens\":20000}); text(r.output); if(r.session_id) text(`SESSION_ID=${r.session_id}`);\n" } ### Tool output · 2026-09-19T00:12:01.475Z Script completed Wall time 29.3 seconds Output: pop 8.556541721030868e-05 4263 count 0.010709951701903768 4263 recent 0.010709951701903768 4263 recent2 0.010709951701903768 4263 org 0.010709951701903768 4263 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd3304f7087d1854107b4df440055", "usage": { "input_tokens": 29023, "cached_input_tokens": 27136, "cache_write_input_tokens": 0, "output_tokens": 97, "reasoning_output_tokens": 19, "total_tokens": 29120 }, "turn_token_usage": { "input_tokens": 462752, "cached_input_tokens": 428032, "cache_write_input_tokens": 0, "output_tokens": 7129, "reasoning_output_tokens": 2235, "total_tokens": 469881 }, "thread_token_usage": { "input_tokens": 462752, "cached_input_tokens": 428032, "cache_write_input_tokens": 0, "output_tokens": 7129, "reasoning_output_tokens": 2235, "total_tokens": 469881 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-5dabb8b7-acc4-4201-816b-4f66a92ef4ee", "process_id": "65415", "command": [ "/bin/sh", "-lc", "/opt/task-venv/bin/python /app/solution/probe_baselines.py" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "/opt/task-venv/bin/python /app/solution/probe_baselines.py" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "pop 8.556541721030868e-05 4263\ncount 0.010709951701903768 4263\nrecent 0.010709951701903768 4263\nrecent2 0.010709951701903768 4263\norg 0.010709951701903768 4263\n", "stderr": "", "aggregated_output": "pop 8.556541721030868e-05 4263\ncount 0.010709951701903768 4263\nrecent 0.010709951701903768 4263\nrecent2 0.010709951701903768 4263\norg 0.010709951701903768 4263\n", "exit_code": 0, "duration": { "secs": 29, "nanos": 125293540 }, "formatted_output": "pop 8.556541721030868e-05 4263\ncount 0.010709951701903768 4263\nrecent 0.010709951701903768 4263\nrecent2 0.010709951701903768 4263\norg 0.010709951701903768 4263\n" } } ## Step 28 · agent · 2026-09-19T00:12:04.149Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:12:05.288Z { "code": "const r = await tools.exec_command({cmd:\"for f in /app/solution/validation_*.parquet; do /opt/task-venv/bin/python /task/evaluate_public.py \\\"$f\\\" | tail -7; done\",\"workdir\":\"/app\",\"yield_time_ms\":30000,\"max_output_tokens\":20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:12:21.824Z Script completed Wall time 16.5 seconds Output: { "model": "/app/solution/validation_count.parquet", "scores": { "quality_ndcg@10": 0.01071, "quality_users": 4263 } } { "model": "/app/solution/validation_org.parquet", "scores": { "quality_ndcg@10": 0.01071, "quality_users": 4263 } } { "model": "/app/solution/validation_pop.parquet", "scores": { "quality_ndcg@10": 8.6e-05, "quality_users": 4263 } } { "model": "/app/solution/validation_recent.parquet", "scores": { "quality_ndcg@10": 0.01071, "quality_users": 4263 } } { "model": "/app/solution/validation_recent2.parquet", "scores": { "quality_ndcg@10": 0.01071, "quality_users": 4263 } } ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd351c19c87d18c196041fe32e3a0", "usage": { "input_tokens": 29216, "cached_input_tokens": 28800, "cache_write_input_tokens": 0, "output_tokens": 136, "reasoning_output_tokens": 51, "total_tokens": 29352 }, "turn_token_usage": { "input_tokens": 491968, "cached_input_tokens": 456832, "cache_write_input_tokens": 0, "output_tokens": 7265, "reasoning_output_tokens": 2286, "total_tokens": 499233 }, "thread_token_usage": { "input_tokens": 491968, "cached_input_tokens": 456832, "cache_write_input_tokens": 0, "output_tokens": 7265, "reasoning_output_tokens": 2286, "total_tokens": 499233 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-7c9c8d18-dbcf-437b-9279-3a2b2152a6fa", "process_id": "8288", "command": [ "/bin/sh", "-lc", "for f in /app/solution/validation_*.parquet; do /opt/task-venv/bin/python /task/evaluate_public.py \"$f\" | tail -7; done" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "for f in /app/solution/validation_*.parquet; do /opt/task-venv/bin/python /task/evaluate_public.py \"$f\" | tail -7; done" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "{\n \"model\": \"/app/solution/validation_count.parquet\",\n \"scores\": {\n \"quality_ndcg@10\": 0.01071,\n \"quality_users\": 4263\n }\n}\n{\n \"model\": \"/app/solution/validation_org.parquet\",\n \"scores\": {\n \"quality_ndcg@10\": 0.01071,\n \"quality_users\": 4263\n }\n}\n{\n \"model\": \"/app/solution/validation_pop.parquet\",\n \"scores\": {\n \"quality_ndcg@10\": 8.6e-05,\n \"quality_users\": 4263\n }\n}\n{\n \"model\": \"/app/solution/validation_recent.parquet\",\n \"scores\": {\n \"quality_ndcg@10\": 0.01071,\n \"quality_users\": 4263\n }\n}\n{\n \"model\": \"/app/solution/validation_recent2.parquet\",\n \"scores\": {\n \"quality_ndcg@10\": 0.01071,\n \"quality_users\": 4263\n }\n}\n", "stderr": "", "aggregated_output": "{\n \"model\": \"/app/solution/validation_count.parquet\",\n \"scores\": {\n \"quality_ndcg@10\": 0.01071,\n \"quality_users\": 4263\n }\n}\n{\n \"model\": \"/app/solution/validation_org.parquet\",\n \"scores\": {\n \"quality_ndcg@10\": 0.01071,\n \"quality_users\": 4263\n }\n}\n{\n \"model\": \"/app/solution/validation_pop.parquet\",\n \"scores\": {\n \"quality_ndcg@10\": 8.6e-05,\n \"quality_users\": 4263\n }\n}\n{\n \"model\": \"/app/solution/validation_recent.parquet\",\n \"scores\": {\n \"quality_ndcg@10\": 0.01071,\n \"quality_users\": 4263\n }\n}\n{\n \"model\": \"/app/solution/validation_recent2.parquet\",\n \"scores\": {\n \"quality_ndcg@10\": 0.01071,\n \"quality_users\": 4263\n }\n}\n", "exit_code": 0, "duration": { "secs": 16, "nanos": 367359730 }, "formatted_output": "{\n \"model\": \"/app/solution/validation_count.parquet\",\n \"scores\": {\n \"quality_ndcg@10\": 0.01071,\n \"quality_users\": 4263\n }\n}\n{\n \"model\": \"/app/solution/validation_org.parquet\",\n \"scores\": {\n \"quality_ndcg@10\": 0.01071,\n \"quality_users\": 4263\n }\n}\n{\n \"model\": \"/app/solution/validation_pop.parquet\",\n \"scores\": {\n \"quality_ndcg@10\": 8.6e-05,\n \"quality_users\": 4263\n }\n}\n{\n \"model\": \"/app/solution/validation_recent.parquet\",\n \"scores\": {\n \"quality_ndcg@10\": 0.01071,\n \"quality_users\": 4263\n }\n}\n{\n \"model\": \"/app/solution/validation_recent2.parquet\",\n \"scores\": {\n \"quality_ndcg@10\": 0.01071,\n \"quality_users\": 4263\n }\n}\n" } } ## Step 29 · agent · 2026-09-19T00:12:26.434Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:12:27.815Z { "code": "const r = await tools.exec_command({cmd:\"/opt/task-venv/bin/python - <<'PY'\\nimport pandas as pd\\np='/app/solution/'\\nfor n in ['count','recent','org']:\\n d=pd.read_parquet(p+'validation_'+n+'.parquet'); print(n,d[d.uid==100].head(10).item_id.tolist())\\nPY\",\"workdir\":\"/app\",\"yield_time_ms\":10000,\"max_output_tokens\":10000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:12:29.437Z Script completed Wall time 1.6 seconds Output: count [5862961, 6901374, 5635052, 3542184, 8213481, 906358, 2859641, 3033749, 2651314, 5252571] recent [5862961, 6901374, 5635052, 3542184, 8213481, 906358, 2859641, 3033749, 2651314, 5252571] org [5862961, 6901374, 5635052, 3542184, 8213481, 906358, 2859641, 3033749, 2651314, 5252571] ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd365fc4087d1b1d039fec14a015b", "usage": { "input_tokens": 29608, "cached_input_tokens": 29056, "cache_write_input_tokens": 0, "output_tokens": 234, "reasoning_output_tokens": 115, "total_tokens": 29842 }, "turn_token_usage": { "input_tokens": 521576, "cached_input_tokens": 485888, "cache_write_input_tokens": 0, "output_tokens": 7499, "reasoning_output_tokens": 2401, "total_tokens": 529075 }, "thread_token_usage": { "input_tokens": 521576, "cached_input_tokens": 485888, "cache_write_input_tokens": 0, "output_tokens": 7499, "reasoning_output_tokens": 2401, "total_tokens": 529075 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-c3544b94-a093-45b4-8689-8cac15a70795", "process_id": "19990", "command": [ "/bin/sh", "-lc", "/opt/task-venv/bin/python - <<'PY'\nimport pandas as pd\np='/app/solution/'\nfor n in ['count','recent','org']:\n d=pd.read_parquet(p+'validation_'+n+'.parquet'); print(n,d[d.uid==100].head(10).item_id.tolist())\nPY" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "/opt/task-venv/bin/python - <<'PY'\nimport pandas as pd\np='/app/solution/'\nfor n in ['count','recent','org']:\n d=pd.read_parquet(p+'validation_'+n+'.parquet'); print(n,d[d.uid==100].head(10).item_id.tolist())\nPY" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "count [5862961, 6901374, 5635052, 3542184, 8213481, 906358, 2859641, 3033749, 2651314, 5252571]\nrecent [5862961, 6901374, 5635052, 3542184, 8213481, 906358, 2859641, 3033749, 2651314, 5252571]\norg [5862961, 6901374, 5635052, 3542184, 8213481, 906358, 2859641, 3033749, 2651314, 5252571]\n", "stderr": "", "aggregated_output": "count [5862961, 6901374, 5635052, 3542184, 8213481, 906358, 2859641, 3033749, 2651314, 5252571]\nrecent [5862961, 6901374, 5635052, 3542184, 8213481, 906358, 2859641, 3033749, 2651314, 5252571]\norg [5862961, 6901374, 5635052, 3542184, 8213481, 906358, 2859641, 3033749, 2651314, 5252571]\n", "exit_code": 0, "duration": { "secs": 1, "nanos": 453378022 }, "formatted_output": "count [5862961, 6901374, 5635052, 3542184, 8213481, 906358, 2859641, 3033749, 2651314, 5252571]\nrecent [5862961, 6901374, 5635052, 3542184, 8213481, 906358, 2859641, 3033749, 2651314, 5252571]\norg [5862961, 6901374, 5635052, 3542184, 8213481, 906358, 2859641, 3033749, 2651314, 5252571]\n" } } ## Step 30 · agent · 2026-09-19T00:12:32.602Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:12:34.036Z { "code": "const r = await tools.exec_command({cmd:\"/opt/task-venv/bin/python - <<'PY'\\nimport pandas as pd\\nx=pd.read_parquet('/app/solution/history_agg.parquet'); print(x.shape,x.head(), x[x.uid==100].sort_values('cnt',ascending=False).head(20).to_string(index=False))\\nPY\",\"workdir\":\"/app\",\"yield_time_ms\":10000,\"max_output_tokens\":10000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:12:35.757Z Script completed Wall time 1.7 seconds Output: (5514505, 8) uid item_id cnt org80 r7 r30 r90 last 0 100 8326270 3.0 0.0 0.0 0.0 0.0 10935310 1 100 286361 8.0 2.0 1.0 2.0 2.0 24691680 2 100 732449 28.0 21.0 2.0 5.0 12.0 24416020 3 100 7849270 6.0 0.0 0.0 0.0 3.0 21054500 4 100 1449307 9.0 8.0 0.0 0.0 0.0 6867865 uid item_id cnt org80 r7 r30 r90 last 100 4221787 35.0 30.0 2.0 3.0 13.0 24413900 100 3633039 31.0 22.0 3.0 5.0 16.0 24597370 100 4943655 29.0 23.0 2.0 3.0 8.0 24415080 100 732449 28.0 21.0 2.0 5.0 12.0 24416020 100 4099299 27.0 21.0 2.0 3.0 14.0 24413740 100 1912005 26.0 22.0 2.0 5.0 10.0 24416270 100 1730273 24.0 21.0 2.0 4.0 12.0 24415075 100 6568592 22.0 18.0 2.0 4.0 9.0 24416020 100 410868 21.0 20.0 3.0 5.0 12.0 24747330 100 2621343 21.0 20.0 2.0 4.0 11.0 24415075 100 5699545 21.0 19.0 2.0 4.0 9.0 24416115 100 8490756 20.0 15.0 3.0 5.0 10.0 24599255 100 1143002 19.0 16.0 2.0 4.0 8.0 24423270 100 289597 16.0 8.0 2.0 4.0 6.0 24423270 100 6826570 15.0 10.0 1.0 2.0 3.0 24729745 100 6926647 14.0 5.0 1.0 1.0 2.0 24692725 100 5338928 14.0 10.0 2.0 4.0 8.0 24423270 100 8587121 14.0 8.0 1.0 1.0 4.0 24749680 100 2219570 14.0 10.0 2.0 3.0 8.0 24416020 100 448177 14.0 11.0 2.0 6.0 11.0 24423270 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd36da52087d1abd73cf39f87c258", "usage": { "input_tokens": 30015, "cached_input_tokens": 29440, "cache_write_input_tokens": 0, "output_tokens": 163, "reasoning_output_tokens": 50, "total_tokens": 30178 }, "turn_token_usage": { "input_tokens": 551591, "cached_input_tokens": 515328, "cache_write_input_tokens": 0, "output_tokens": 7662, "reasoning_output_tokens": 2451, "total_tokens": 559253 }, "thread_token_usage": { "input_tokens": 551591, "cached_input_tokens": 515328, "cache_write_input_tokens": 0, "output_tokens": 7662, "reasoning_output_tokens": 2451, "total_tokens": 559253 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-b250269c-aa45-4c60-89c2-b82a027f3397", "process_id": "89491", "command": [ "/bin/sh", "-lc", "/opt/task-venv/bin/python - <<'PY'\nimport pandas as pd\nx=pd.read_parquet('/app/solution/history_agg.parquet'); print(x.shape,x.head(), x[x.uid==100].sort_values('cnt',ascending=False).head(20).to_string(index=False))\nPY" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "/opt/task-venv/bin/python - <<'PY'\nimport pandas as pd\nx=pd.read_parquet('/app/solution/history_agg.parquet'); print(x.shape,x.head(), x[x.uid==100].sort_values('cnt',ascending=False).head(20).to_string(index=False))\nPY" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "(5514505, 8) uid item_id cnt org80 r7 r30 r90 last\n0 100 8326270 3.0 0.0 0.0 0.0 0.0 10935310\n1 100 286361 8.0 2.0 1.0 2.0 2.0 24691680\n2 100 732449 28.0 21.0 2.0 5.0 12.0 24416020\n3 100 7849270 6.0 0.0 0.0 0.0 3.0 21054500\n4 100 1449307 9.0 8.0 0.0 0.0 0.0 6867865 uid item_id cnt org80 r7 r30 r90 last\n 100 4221787 35.0 30.0 2.0 3.0 13.0 24413900\n 100 3633039 31.0 22.0 3.0 5.0 16.0 24597370\n 100 4943655 29.0 23.0 2.0 3.0 8.0 24415080\n 100 732449 28.0 21.0 2.0 5.0 12.0 24416020\n 100 4099299 27.0 21.0 2.0 3.0 14.0 24413740\n 100 1912005 26.0 22.0 2.0 5.0 10.0 24416270\n 100 1730273 24.0 21.0 2.0 4.0 12.0 24415075\n 100 6568592 22.0 18.0 2.0 4.0 9.0 24416020\n 100 410868 21.0 20.0 3.0 5.0 12.0 24747330\n 100 2621343 21.0 20.0 2.0 4.0 11.0 24415075\n 100 5699545 21.0 19.0 2.0 4.0 9.0 24416115\n 100 8490756 20.0 15.0 3.0 5.0 10.0 24599255\n 100 1143002 19.0 16.0 2.0 4.0 8.0 24423270\n 100 289597 16.0 8.0 2.0 4.0 6.0 24423270\n 100 6826570 15.0 10.0 1.0 2.0 3.0 24729745\n 100 6926647 14.0 5.0 1.0 1.0 2.0 24692725\n 100 5338928 14.0 10.0 2.0 4.0 8.0 24423270\n 100 8587121 14.0 8.0 1.0 1.0 4.0 24749680\n 100 2219570 14.0 10.0 2.0 3.0 8.0 24416020\n 100 448177 14.0 11.0 2.0 6.0 11.0 24423270\n", "stderr": "", "aggregated_output": "(5514505, 8) uid item_id cnt org80 r7 r30 r90 last\n0 100 8326270 3.0 0.0 0.0 0.0 0.0 10935310\n1 100 286361 8.0 2.0 1.0 2.0 2.0 24691680\n2 100 732449 28.0 21.0 2.0 5.0 12.0 24416020\n3 100 7849270 6.0 0.0 0.0 0.0 3.0 21054500\n4 100 1449307 9.0 8.0 0.0 0.0 0.0 6867865 uid item_id cnt org80 r7 r30 r90 last\n 100 4221787 35.0 30.0 2.0 3.0 13.0 24413900\n 100 3633039 31.0 22.0 3.0 5.0 16.0 24597370\n 100 4943655 29.0 23.0 2.0 3.0 8.0 24415080\n 100 732449 28.0 21.0 2.0 5.0 12.0 24416020\n 100 4099299 27.0 21.0 2.0 3.0 14.0 24413740\n 100 1912005 26.0 22.0 2.0 5.0 10.0 24416270\n 100 1730273 24.0 21.0 2.0 4.0 12.0 24415075\n 100 6568592 22.0 18.0 2.0 4.0 9.0 24416020\n 100 410868 21.0 20.0 3.0 5.0 12.0 24747330\n 100 2621343 21.0 20.0 2.0 4.0 11.0 24415075\n 100 5699545 21.0 19.0 2.0 4.0 9.0 24416115\n 100 8490756 20.0 15.0 3.0 5.0 10.0 24599255\n 100 1143002 19.0 16.0 2.0 4.0 8.0 24423270\n 100 289597 16.0 8.0 2.0 4.0 6.0 24423270\n 100 6826570 15.0 10.0 1.0 2.0 3.0 24729745\n 100 6926647 14.0 5.0 1.0 1.0 2.0 24692725\n 100 5338928 14.0 10.0 2.0 4.0 8.0 24423270\n 100 8587121 14.0 8.0 1.0 1.0 4.0 24749680\n 100 2219570 14.0 10.0 2.0 3.0 8.0 24416020\n 100 448177 14.0 11.0 2.0 6.0 11.0 24423270\n", "exit_code": 0, "duration": { "secs": 1, "nanos": 551941625 }, "formatted_output": "(5514505, 8) uid item_id cnt org80 r7 r30 r90 last\n0 100 8326270 3.0 0.0 0.0 0.0 0.0 10935310\n1 100 286361 8.0 2.0 1.0 2.0 2.0 24691680\n2 100 732449 28.0 21.0 2.0 5.0 12.0 24416020\n3 100 7849270 6.0 0.0 0.0 0.0 3.0 21054500\n4 100 1449307 9.0 8.0 0.0 0.0 0.0 6867865 uid item_id cnt org80 r7 r30 r90 last\n 100 4221787 35.0 30.0 2.0 3.0 13.0 24413900\n 100 3633039 31.0 22.0 3.0 5.0 16.0 24597370\n 100 4943655 29.0 23.0 2.0 3.0 8.0 24415080\n 100 732449 28.0 21.0 2.0 5.0 12.0 24416020\n 100 4099299 27.0 21.0 2.0 3.0 14.0 24413740\n 100 1912005 26.0 22.0 2.0 5.0 10.0 24416270\n 100 1730273 24.0 21.0 2.0 4.0 12.0 24415075\n 100 6568592 22.0 18.0 2.0 4.0 9.0 24416020\n 100 410868 21.0 20.0 3.0 5.0 12.0 24747330\n 100 2621343 21.0 20.0 2.0 4.0 11.0 24415075\n 100 5699545 21.0 19.0 2.0 4.0 9.0 24416115\n 100 8490756 20.0 15.0 3.0 5.0 10.0 24599255\n 100 1143002 19.0 16.0 2.0 4.0 8.0 24423270\n 100 289597 16.0 8.0 2.0 4.0 6.0 24423270\n 100 6826570 15.0 10.0 1.0 2.0 3.0 24729745\n 100 6926647 14.0 5.0 1.0 1.0 2.0 24692725\n 100 5338928 14.0 10.0 2.0 4.0 8.0 24423270\n 100 8587121 14.0 8.0 1.0 1.0 4.0 24749680\n 100 2219570 14.0 10.0 2.0 3.0 8.0 24416020\n 100 448177 14.0 11.0 2.0 6.0 11.0 24423270\n" } } ## Step 31 · agent · 2026-09-19T00:12:38.278Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:12:40.901Z { "code": "const r = await tools.exec_command({cmd:\"/opt/task-venv/bin/python - <<'PY'\\nimport numpy as np\\nz=np.load('/task/data/validation_eligible_candidates.npz');items=z['item_ids'];p=z['packed_eligible'];\\nfor i in [4221787,3633039,4943655,732449,5862961]:\\n c=np.where(items==i)[0][0]; print(i,bool((p[0,c//8]>>(c%8))&1),c)\\nPY\",\"workdir\":\"/app\",\"yield_time_ms\":10000,\"max_output_tokens\":10000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:12:41.405Z Script completed Wall time 0.5 seconds Output: 4221787 False 2364 3633039 False 2698 4943655 False 10657 732449 False 14544 5862961 True 0 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd373e99487d197ef232dbd5b0b27", "usage": { "input_tokens": 31136, "cached_input_tokens": 28160, "cache_write_input_tokens": 0, "output_tokens": 174, "reasoning_output_tokens": 20, "total_tokens": 31310 }, "turn_token_usage": { "input_tokens": 582727, "cached_input_tokens": 543488, "cache_write_input_tokens": 0, "output_tokens": 7836, "reasoning_output_tokens": 2471, "total_tokens": 590563 }, "thread_token_usage": { "input_tokens": 582727, "cached_input_tokens": 543488, "cache_write_input_tokens": 0, "output_tokens": 7836, "reasoning_output_tokens": 2471, "total_tokens": 590563 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-7c4ffcb2-df94-4e57-9226-1c7e0ec7383e", "process_id": "32997", "command": [ "/bin/sh", "-lc", "/opt/task-venv/bin/python - <<'PY'\nimport numpy as np\nz=np.load('/task/data/validation_eligible_candidates.npz');items=z['item_ids'];p=z['packed_eligible'];\nfor i in [4221787,3633039,4943655,732449,5862961]:\n c=np.where(items==i)[0][0]; print(i,bool((p[0,c//8]>>(c%8))&1),c)\nPY" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "/opt/task-venv/bin/python - <<'PY'\nimport numpy as np\nz=np.load('/task/data/validation_eligible_candidates.npz');items=z['item_ids'];p=z['packed_eligible'];\nfor i in [4221787,3633039,4943655,732449,5862961]:\n c=np.where(items==i)[0][0]; print(i,bool((p[0,c//8]>>(c%8))&1),c)\nPY" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "4221787 False 2364\n3633039 False 2698\n4943655 False 10657\n732449 False 14544\n5862961 True 0\n", "stderr": "", "aggregated_output": "4221787 False 2364\n3633039 False 2698\n4943655 False 10657\n732449 False 14544\n5862961 True 0\n", "exit_code": 0, "duration": { "secs": 0, "nanos": 336832832 }, "formatted_output": "4221787 False 2364\n3633039 False 2698\n4943655 False 10657\n732449 False 14544\n5862961 True 0\n" } } ## Step 32 · agent · 2026-09-19T00:12:56.094Z ### Thinking unavailable — no text recorded ## Step 33 · agent · 2026-09-19T00:13:10.083Z ### Thinking unavailable — no text recorded ## Step 34 · agent · 2026-09-19T00:13:23.760Z ### Thinking unavailable — no text recorded ## Step 35 · agent · 2026-09-19T00:13:39.067Z ### Thinking unavailable — no text recorded ## Step 36 · agent · 2026-09-19T00:13:45.379Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:13:49.581Z { "code": "const r = await tools.exec_command({cmd:\"/opt/task-venv/bin/python - <<'PY'\\nimport numpy as np, pandas as pd\\nz=np.load('/task/data/test_eligible_candidates.npz'); u=z['uids']; it=z['item_ids']; p=z['packed_eligible']; rows=[]\\nfor r,uid in enumerate(u):\\n m=np.unpackbits(p[r],count=len(it),bitorder='little').astype(bool); top=it[m][:100]\\n rows.extend((int(uid),int(x),j+1) for j,x in enumerate(top))\\npd.DataFrame(rows,columns=['uid','item_id','rank']).to_parquet('/app/solution/submission.parquet',index=False)\\nprint(len(rows))\\nPY\",\"workdir\":\"/app\",\"yield_time_ms\":10000,\"max_output_tokens\":10000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:13:52.334Z Script completed Wall time 2.7 seconds Output: 845600 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd3799a6887d1977f67bb8f15da7b", "usage": { "input_tokens": 31371, "cached_input_tokens": 30976, "cache_write_input_tokens": 0, "output_tokens": 2502, "reasoning_output_tokens": 2301, "total_tokens": 33873 }, "turn_token_usage": { "input_tokens": 614098, "cached_input_tokens": 574464, "cache_write_input_tokens": 0, "output_tokens": 10338, "reasoning_output_tokens": 4772, "total_tokens": 624436 }, "thread_token_usage": { "input_tokens": 614098, "cached_input_tokens": 574464, "cache_write_input_tokens": 0, "output_tokens": 10338, "reasoning_output_tokens": 4772, "total_tokens": 624436 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-c582a2cc-7af7-4a02-8b4a-694738bba922", "process_id": "1997", "command": [ "/bin/sh", "-lc", "/opt/task-venv/bin/python - <<'PY'\nimport numpy as np, pandas as pd\nz=np.load('/task/data/test_eligible_candidates.npz'); u=z['uids']; it=z['item_ids']; p=z['packed_eligible']; rows=[]\nfor r,uid in enumerate(u):\n m=np.unpackbits(p[r],count=len(it),bitorder='little').astype(bool); top=it[m][:100]\n rows.extend((int(uid),int(x),j+1) for j,x in enumerate(top))\npd.DataFrame(rows,columns=['uid','item_id','rank']).to_parquet('/app/solution/submission.parquet',index=False)\nprint(len(rows))\nPY" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "/opt/task-venv/bin/python - <<'PY'\nimport numpy as np, pandas as pd\nz=np.load('/task/data/test_eligible_candidates.npz'); u=z['uids']; it=z['item_ids']; p=z['packed_eligible']; rows=[]\nfor r,uid in enumerate(u):\n m=np.unpackbits(p[r],count=len(it),bitorder='little').astype(bool); top=it[m][:100]\n rows.extend((int(uid),int(x),j+1) for j,x in enumerate(top))\npd.DataFrame(rows,columns=['uid','item_id','rank']).to_parquet('/app/solution/submission.parquet',index=False)\nprint(len(rows))\nPY" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "845600\n", "stderr": "", "aggregated_output": "845600\n", "exit_code": 0, "duration": { "secs": 2, "nanos": 585572057 }, "formatted_output": "845600\n" } } ## Step 37 · agent · 2026-09-19T00:14:07.932Z ### Thinking unavailable — no text recorded ## Step 38 · agent · 2026-09-19T00:14:23.744Z ### Thinking unavailable — no text recorded ## Step 39 · agent · 2026-09-19T00:14:28.550Z ### Thinking unavailable — no text recorded A valid popularity-based `submission.parquet` is now saved as a fallback. The eligibility masks confirm that previously consumed positives are generally removed, so raw repeat counts cannot solve this shelf—the validation score was 0.010710. I’m switching to the core discovery signal: train item geometry from co-consumption, then encode each user from their eligible-excluded history and retrieve unseen candidates by dot product. ### exec · 2026-09-19T00:15:17.429Z { "code": "const patch = \"*** Begin Patch\\n*** Add File: /app/solution/build_ranker.py\\n+#!/usr/bin/env python3\\n+\\\"\\\"\\\"Train and apply a scalable history-based PyTorch two-tower ranker.\\n+\\n+The training representation is a list of positive interactions per user, never\\n+a dense/global user-item matrix. At serving time UserTower is evaluated once;\\n+ItemTower outputs can be precomputed and indexed for maximum inner product.\\n+\\\"\\\"\\\"\\n+from __future__ import annotations\\n+import argparse, json, math, random, time\\n+from pathlib import Path\\n+import numpy as np\\n+import pandas as pd\\n+import torch\\n+from torch import nn\\n+import torch.nn.functional as F\\n+\\n+DATA = Path('/task/data')\\n+HERE = Path(__file__).resolve().parent\\n+DIM = 64\\n+MAX_HISTORY = 192\\n+\\n+\\n+class UserTower(nn.Module):\\n+ \\\"\\\"\\\"Neural history encoder: multi-view weighted pooling followed by an MLP.\\\"\\\"\\\"\\n+ def __init__(self, n_items: int, dim: int = DIM):\\n+ super().__init__()\\n+ self.history_embedding = nn.Embedding(n_items, dim)\\n+ self.mlp = nn.Sequential(\\n+ nn.Linear(4 * dim, 2 * dim), nn.GELU(), nn.LayerNorm(2 * dim),\\n+ nn.Linear(2 * dim, dim),\\n+ )\\n+ nn.init.normal_(self.history_embedding.weight, std=0.06)\\n+\\n+ def forward(self, item_ids: torch.Tensor, weights: torch.Tensor) -> torch.Tensor:\\n+ # item_ids [B,H], weights [B,H,4]. Pool views are long-term,\\n+ # recent, high-completion/liked, and signed explicit preference.\\n+ emb = self.history_embedding(item_ids) # [B,H,D]\\n+ denom = weights.abs().sum(1).clamp_min(1e-5) # [B,4]\\n+ pooled = torch.einsum('bhd,bhv->bvd', emb, weights) / denom.unsqueeze(-1)\\n+ return F.normalize(self.mlp(pooled.flatten(1)), dim=-1)\\n+\\n+\\n+class ItemTower(nn.Module):\\n+ \\\"\\\"\\\"Independent item-ID neural tower whose outputs are cached offline.\\\"\\\"\\\"\\n+ def __init__(self, n_items: int, dim: int = DIM):\\n+ super().__init__()\\n+ self.item_embedding = nn.Embedding(n_items, dim)\\n+ self.mlp = nn.Sequential(nn.Linear(dim, 2*dim), nn.GELU(), nn.Linear(2*dim, dim))\\n+ nn.init.normal_(self.item_embedding.weight, std=0.06)\\n+\\n+ def forward(self, item_ids: torch.Tensor) -> torch.Tensor:\\n+ x = self.item_embedding(item_ids)\\n+ return F.normalize(x + 0.25 * self.mlp(x), dim=-1)\\n+\\n+\\n+class TwoTower(nn.Module):\\n+ def __init__(self, n_items: int):\\n+ super().__init__(); self.user_tower = UserTower(n_items); self.item_tower = ItemTower(n_items)\\n+\\n+\\n+def load_histories(stage: str):\\n+ \\\"\\\"\\\"Return ragged interaction lists. This is not a user-item matrix.\\\"\\\"\\\"\\n+ catalog = pd.read_parquet(DATA/'candidate_catalog.parquet')\\n+ item_ids = catalog.item_id.to_numpy(np.int64)\\n+ item_col = {int(x): i for i, x in enumerate(item_ids)}\\n+ target_uids = pd.read_parquet(DATA/'target_users.parquet').uid.to_numpy(np.int64)\\n+ agg = pd.read_parquet(HERE/'history_agg.parquet')\\n+ # Add validation outcomes only for final refitting.\\n+ if stage == 'final':\\n+ vl = pd.read_parquet(DATA/'val_listens.parquet', columns=['uid','timestamp','item_id','is_organic','played_ratio_pct'])\\n+ vl = vl[(vl.played_ratio_pct >= 50) & vl.uid.isin(target_uids) & vl.item_id.isin(item_ids)].copy()\\n+ vl['cnt']=1.; vl['org80']=((vl.is_organic==1)&(vl.played_ratio_pct>=80)).astype('float32')\\n+ vl['r7']=1.; vl['r30']=1.; vl['r90']=1.\\n+ va=vl.groupby(['uid','item_id'],sort=False).agg(cnt=('cnt','sum'),org80=('org80','sum'),r7=('r7','sum'),r30=('r30','sum'),r90=('r90','sum'),last=('timestamp','max')).reset_index()\\n+ agg=pd.concat([agg,va],ignore_index=True).groupby(['uid','item_id'],sort=False).agg(\\n+ cnt=('cnt','sum'),org80=('org80','sum'),r7=('r7','sum'),r30=('r30','sum'),r90=('r90','sum'),last=('last','max')).reset_index()\\n+ pref_name = 'validation_preference_state.parquet' if stage == 'validation' else 'test_preference_state.parquet'\\n+ pref = pd.read_parquet(DATA/pref_name)\\n+ pref = pref[pref.uid.isin(target_uids) & pref.item_id.isin(item_ids)].copy()\\n+ pref['pval'] = np.where(pref.state.eq('liked'), 1.0, -1.0).astype(np.float32)\\n+ # Both channels may be active; sum gives zero, faithfully representing conflict.\\n+ pref = pref.groupby(['uid','item_id'],sort=False).pval.sum().reset_index()\\n+ pref_groups = {int(u): g for u,g in pref.groupby('uid',sort=False)}\\n+ agg_groups = {int(u): g for u,g in agg.groupby('uid',sort=False)}\\n+ histories=[]\\n+ for uid in target_uids:\\n+ g=agg_groups.get(int(uid))\\n+ entries={}\\n+ if g is not None:\\n+ for r in g.itertuples(index=False):\\n+ c=item_col.get(int(r.item_id))\\n+ if c is not None:\\n+ entries[c]=[math.log1p(float(r.cnt)),\\n+ .35*math.log1p(float(r.cnt))+math.log1p(float(r.r90))+2*math.log1p(float(r.r30))+4*math.log1p(float(r.r7)),\\n+ math.log1p(float(r.org80)), 0.0]\\n+ pg=pref_groups.get(int(uid))\\n+ if pg is not None:\\n+ for r in pg.itertuples(index=False):\\n+ c=item_col.get(int(r.item_id))\\n+ if c is None: continue\\n+ if c not in entries: entries[c]=[0.,0.,0.,0.]\\n+ entries[c][3]=float(r.pval)\\n+ if r.pval > 0: entries[c][2] += 2.5*float(r.pval)\\n+ cols=np.fromiter(entries.keys(),dtype=np.int64)\\n+ w=np.asarray(list(entries.values()),dtype=np.float32)\\n+ # Positive targets require a listen or active like, never dislikes alone.\\n+ target=np.flatnonzero((w[:,0] > 0) | (w[:,2] > 0)).astype(np.int64)\\n+ histories.append((cols,w,target))\\n+ return target_uids,item_ids,catalog,histories\\n+\\n+\\n+def load_eligibility(stage: str):\\n+ name='validation_eligible_candidates.npz' if stage=='validation' else 'test_eligible_candidates.npz'\\n+ z=np.load(DATA/name)\\n+ return z['uids'].astype(np.int64),z['item_ids'].astype(np.int64),z['packed_eligible'].copy()\\n+\\n+\\n+def make_batch(histories, user_rows, packed, rng, targets_per_user=4, neg_per_target=20):\\n+ B=len(user_rows); H=MAX_HISTORY\\n+ hidx=np.zeros((B,H),np.int64); hw=np.zeros((B,H,4),np.float32)\\n+ pos=np.zeros((B,targets_per_user),np.int64); neg=np.zeros((B,targets_per_user,neg_per_target),np.int64)\\n+ for bi,ur in enumerate(user_rows):\\n+ cols,w,tpool=histories[int(ur)]\\n+ # Sample held-out training targets, emphasizing high-completion/liked signals.\\n+ tp=w[tpool,2]+0.20*w[tpool,0]+0.05\\n+ chosen=rng.choice(tpool,size=targets_per_user,replace=len(tpool)H: available=rng.choice(available,H,replace=False)\\n+ take=len(available); hidx[bi,:take]=cols[available]; hw[bi,:take]=w[available]\\n+ # Training negatives come from platform-eligible unseen items at this cutoff.\\n+ elig=np.flatnonzero(np.unpackbits(packed[int(ur)],count=30000,bitorder='little'))\\n+ for j in range(targets_per_user):\\n+ neg[bi,j]=rng.choice(elig,size=neg_per_target,replace=False)\\n+ return map(torch.from_numpy,(hidx,hw,pos,neg))\\n+\\n+\\n+def train_model(stage: str, epochs: int, seed: int, checkpoint: Path):\\n+ torch.set_num_threads(min(12, max(1, torch.get_num_threads())))\\n+ random.seed(seed); np.random.seed(seed); torch.manual_seed(seed)\\n+ uids,item_ids,catalog,histories=load_histories(stage)\\n+ euids,eitems,packed=load_eligibility(stage)\\n+ assert np.array_equal(uids,euids) and np.array_equal(item_ids,eitems)\\n+ model=TwoTower(len(item_ids))\\n+ opt=torch.optim.AdamW(model.parameters(),lr=2.2e-3,weight_decay=2e-5)\\n+ rng=np.random.default_rng(seed)\\n+ batch_size=256\\n+ for epoch in range(epochs):\\n+ order=rng.permutation(len(uids)); total=0.; steps=0\\n+ model.train()\\n+ for start in range(0,len(order),batch_size):\\n+ ur=order[start:start+batch_size]\\n+ h,w,p,n=make_batch(histories,ur,packed,rng)\\n+ uv=model.user_tower(h,w)\\n+ pv=model.item_tower(p)\\n+ nv=model.item_tower(n)\\n+ ps=(uv[:,None,:]*pv).sum(-1)\\n+ ns=(uv[:,None,None,:]*nv).sum(-1)\\n+ # Pairwise logistic ranking plus hard-negative emphasis.\\n+ diff=(ps[:,:,None]-ns)*10.0\\n+ loss=F.softplus(-diff).mean()+0.25*F.softplus(-diff.max(-1).values).mean()\\n+ opt.zero_grad(set_to_none=True); loss.backward(); opt.step()\\n+ total+=float(loss); steps+=1\\n+ if epoch==0 or (epoch+1)%5==0: print(f'epoch {epoch+1}/{epochs} loss={total/steps:.5f}',flush=True)\\n+ torch.save({'model':model.state_dict(),'dim':DIM,'seed':seed,'epochs':epochs,'stage':stage},checkpoint)\\n+ return model,(uids,item_ids,catalog,histories,packed)\\n+\\n+\\n+@torch.inference_mode()\\n+def rank(model, bundle, output: Path):\\n+ uids,item_ids,catalog,histories,packed=bundle; model.eval()\\n+ all_items=model.item_tower(torch.arange(len(item_ids))).cpu()\\n+ rows=[]; batch_size=64\\n+ for start in range(0,len(uids),batch_size):\\n+ urs=np.arange(start,min(start+batch_size,len(uids)))\\n+ B=len(urs); h=np.zeros((B,MAX_HISTORY),np.int64); w=np.zeros((B,MAX_HISTORY,4),np.float32)\\n+ for bi,ur in enumerate(urs):\\n+ cols,ww,_=histories[int(ur)]\\n+ # Deterministic inference keeps the most informative history entries.\\n+ importance=ww[:,0]+ww[:,1]+2*ww[:,2]+ww[:,3].clip(min=0)\\n+ ix=np.argsort(-importance,kind='stable')[:MAX_HISTORY]\\n+ h[bi,:len(ix)]=cols[ix]; w[bi,:len(ix)]=ww[ix]\\n+ uv=model.user_tower(torch.from_numpy(h),torch.from_numpy(w)).cpu()\\n+ scores=uv@all_items.T\\n+ for bi,ur in enumerate(urs):\\n+ mask=np.unpackbits(packed[int(ur)],count=len(item_ids),bitorder='little').astype(bool)\\n+ s=scores[bi].numpy(); s[~mask]=-np.inf\\n+ top=np.argpartition(-s,99)[:100]; top=top[np.argsort(-s[top],kind='stable')]\\n+ rows.extend((int(uids[ur]),int(item_ids[c]),r+1) for r,c in enumerate(top))\\n+ pd.DataFrame(rows,columns=['uid','item_id','rank']).to_parquet(output,index=False)\\n+ print(f'wrote {output} ({len(rows)} rows)',flush=True)\\n+\\n+\\n+def main():\\n+ ap=argparse.ArgumentParser(); ap.add_argument('--stage',choices=['validation','final'],required=True)\\n+ ap.add_argument('--epochs',type=int,default=20); ap.add_argument('--seed',type=int,default=20260919)\\n+ ap.add_argument('--output',type=Path); a=ap.parse_args()\\n+ output=a.output or HERE/('validation_neural.parquet' if a.stage=='validation' else 'submission.parquet')\\n+ ckpt=HERE/f'model_{a.stage}.pt'\\n+ model,bundle=train_model(a.stage,a.epochs,a.seed,ckpt); rank(model,bundle,output)\\n+\\n+if __name__=='__main__': main()\\n*** End Patch\";\ntext(await tools.apply_patch(patch));\n" } ### Tool output · 2026-09-19T00:15:17.477Z Script completed Wall time 0.0 seconds Output: {} ### Harness context { "type": "codex_item_completed", "item": { "type": "FileChange", "id": "exec-0a43371b-9b28-43f5-9337-73bc5c876e36", "changes": { "/app/solution/build_ranker.py": { "type": "add", "content": "#!/usr/bin/env python3\n\"\"\"Train and apply a scalable history-based PyTorch two-tower ranker.\n\nThe training representation is a list of positive interactions per user, never\na dense/global user-item matrix. At serving time UserTower is evaluated once;\nItemTower outputs can be precomputed and indexed for maximum inner product.\n\"\"\"\nfrom __future__ import annotations\nimport argparse, json, math, random, time\nfrom pathlib import Path\nimport numpy as np\nimport pandas as pd\nimport torch\nfrom torch import nn\nimport torch.nn.functional as F\n\nDATA = Path('/task/data')\nHERE = Path(__file__).resolve().parent\nDIM = 64\nMAX_HISTORY = 192\n\n\nclass UserTower(nn.Module):\n \"\"\"Neural history encoder: multi-view weighted pooling followed by an MLP.\"\"\"\n def __init__(self, n_items: int, dim: int = DIM):\n super().__init__()\n self.history_embedding = nn.Embedding(n_items, dim)\n self.mlp = nn.Sequential(\n nn.Linear(4 * dim, 2 * dim), nn.GELU(), nn.LayerNorm(2 * dim),\n nn.Linear(2 * dim, dim),\n )\n nn.init.normal_(self.history_embedding.weight, std=0.06)\n\n def forward(self, item_ids: torch.Tensor, weights: torch.Tensor) -> torch.Tensor:\n # item_ids [B,H], weights [B,H,4]. Pool views are long-term,\n # recent, high-completion/liked, and signed explicit preference.\n emb = self.history_embedding(item_ids) # [B,H,D]\n denom = weights.abs().sum(1).clamp_min(1e-5) # [B,4]\n pooled = torch.einsum('bhd,bhv->bvd', emb, weights) / denom.unsqueeze(-1)\n return F.normalize(self.mlp(pooled.flatten(1)), dim=-1)\n\n\nclass ItemTower(nn.Module):\n \"\"\"Independent item-ID neural tower whose outputs are cached offline.\"\"\"\n def __init__(self, n_items: int, dim: int = DIM):\n super().__init__()\n self.item_embedding = nn.Embedding(n_items, dim)\n self.mlp = nn.Sequential(nn.Linear(dim, 2*dim), nn.GELU(), nn.Linear(2*dim, dim))\n nn.init.normal_(self.item_embedding.weight, std=0.06)\n\n def forward(self, item_ids: torch.Tensor) -> torch.Tensor:\n x = self.item_embedding(item_ids)\n return F.normalize(x + 0.25 * self.mlp(x), dim=-1)\n\n\nclass TwoTower(nn.Module):\n def __init__(self, n_items: int):\n super().__init__(); self.user_tower = UserTower(n_items); self.item_tower = ItemTower(n_items)\n\n\ndef load_histories(stage: str):\n \"\"\"Return ragged interaction lists. This is not a user-item matrix.\"\"\"\n catalog = pd.read_parquet(DATA/'candidate_catalog.parquet')\n item_ids = catalog.item_id.to_numpy(np.int64)\n item_col = {int(x): i for i, x in enumerate(item_ids)}\n target_uids = pd.read_parquet(DATA/'target_users.parquet').uid.to_numpy(np.int64)\n agg = pd.read_parquet(HERE/'history_agg.parquet')\n # Add validation outcomes only for final refitting.\n if stage == 'final':\n vl = pd.read_parquet(DATA/'val_listens.parquet', columns=['uid','timestamp','item_id','is_organic','played_ratio_pct'])\n vl = vl[(vl.played_ratio_pct >= 50) & vl.uid.isin(target_uids) & vl.item_id.isin(item_ids)].copy()\n vl['cnt']=1.; vl['org80']=((vl.is_organic==1)&(vl.played_ratio_pct>=80)).astype('float32')\n vl['r7']=1.; vl['r30']=1.; vl['r90']=1.\n va=vl.groupby(['uid','item_id'],sort=False).agg(cnt=('cnt','sum'),org80=('org80','sum'),r7=('r7','sum'),r30=('r30','sum'),r90=('r90','sum'),last=('timestamp','max')).reset_index()\n agg=pd.concat([agg,va],ignore_index=True).groupby(['uid','item_id'],sort=False).agg(\n cnt=('cnt','sum'),org80=('org80','sum'),r7=('r7','sum'),r30=('r30','sum'),r90=('r90','sum'),last=('last','max')).reset_index()\n pref_name = 'validation_preference_state.parquet' if stage == 'validation' else 'test_preference_state.parquet'\n pref = pd.read_parquet(DATA/pref_name)\n pref = pref[pref.uid.isin(target_uids) & pref.item_id.isin(item_ids)].copy()\n pref['pval'] = np.where(pref.state.eq('liked'), 1.0, -1.0).astype(np.float32)\n # Both channels may be active; sum gives zero, faithfully representing conflict.\n pref = pref.groupby(['uid','item_id'],sort=False).pval.sum().reset_index()\n pref_groups = {int(u): g for u,g in pref.groupby('uid',sort=False)}\n agg_groups = {int(u): g for u,g in agg.groupby('uid',sort=False)}\n histories=[]\n for uid in target_uids:\n g=agg_groups.get(int(uid))\n entries={}\n if g is not None:\n for r in g.itertuples(index=False):\n c=item_col.get(int(r.item_id))\n if c is not None:\n entries[c]=[math.log1p(float(r.cnt)),\n .35*math.log1p(float(r.cnt))+math.log1p(float(r.r90))+2*math.log1p(float(r.r30))+4*math.log1p(float(r.r7)),\n math.log1p(float(r.org80)), 0.0]\n pg=pref_groups.get(int(uid))\n if pg is not None:\n for r in pg.itertuples(index=False):\n c=item_col.get(int(r.item_id))\n if c is None: continue\n if c not in entries: entries[c]=[0.,0.,0.,0.]\n entries[c][3]=float(r.pval)\n if r.pval > 0: entries[c][2] += 2.5*float(r.pval)\n cols=np.fromiter(entries.keys(),dtype=np.int64)\n w=np.asarray(list(entries.values()),dtype=np.float32)\n # Positive targets require a listen or active like, never dislikes alone.\n target=np.flatnonzero((w[:,0] > 0) | (w[:,2] > 0)).astype(np.int64)\n histories.append((cols,w,target))\n return target_uids,item_ids,catalog,histories\n\n\ndef load_eligibility(stage: str):\n name='validation_eligible_candidates.npz' if stage=='validation' else 'test_eligible_candidates.npz'\n z=np.load(DATA/name)\n return z['uids'].astype(np.int64),z['item_ids'].astype(np.int64),z['packed_eligible'].copy()\n\n\ndef make_batch(histories, user_rows, packed, rng, targets_per_user=4, neg_per_target=20):\n B=len(user_rows); H=MAX_HISTORY\n hidx=np.zeros((B,H),np.int64); hw=np.zeros((B,H,4),np.float32)\n pos=np.zeros((B,targets_per_user),np.int64); neg=np.zeros((B,targets_per_user,neg_per_target),np.int64)\n for bi,ur in enumerate(user_rows):\n cols,w,tpool=histories[int(ur)]\n # Sample held-out training targets, emphasizing high-completion/liked signals.\n tp=w[tpool,2]+0.20*w[tpool,0]+0.05\n chosen=rng.choice(tpool,size=targets_per_user,replace=len(tpool)H: available=rng.choice(available,H,replace=False)\n take=len(available); hidx[bi,:take]=cols[available]; hw[bi,:take]=w[available]\n # Training negatives come from platform-eligible unseen items at this cutoff.\n elig=np.flatnonzero(np.unpackbits(packed[int(ur)],count=30000,bitorder='little'))\n for j in range(targets_per_user):\n neg[bi,j]=rng.choice(elig,size=neg_per_target,replace=False)\n return map(torch.from_numpy,(hidx,hw,pos,neg))\n\n\ndef train_model(stage: str, epochs: int, seed: int, checkpoint: Path):\n torch.set_num_threads(min(12, max(1, torch.get_num_threads())))\n random.seed(seed); np.random.seed(seed); torch.manual_seed(seed)\n uids,item_ids,catalog,histories=load_histories(stage)\n euids,eitems,packed=load_eligibility(stage)\n assert np.array_equal(uids,euids) and np.array_equal(item_ids,eitems)\n model=TwoTower(len(item_ids))\n opt=torch.optim.AdamW(model.parameters(),lr=2.2e-3,weight_decay=2e-5)\n rng=np.random.default_rng(seed)\n batch_size=256\n for epoch in range(epochs):\n order=rng.permutation(len(uids)); total=0.; steps=0\n model.train()\n for start in range(0,len(order),batch_size):\n ur=order[start:start+batch_size]\n h,w,p,n=make_batch(histories,ur,packed,rng)\n uv=model.user_tower(h,w)\n pv=model.item_tower(p)\n nv=model.item_tower(n)\n ps=(uv[:,None,:]*pv).sum(-1)\n ns=(uv[:,None,None,:]*nv).sum(-1)\n # Pairwise logistic ranking plus hard-negative emphasis.\n diff=(ps[:,:,None]-ns)*10.0\n loss=F.softplus(-diff).mean()+0.25*F.softplus(-diff.max(-1).values).mean()\n opt.zero_grad(set_to_none=True); loss.backward(); opt.step()\n total+=float(loss); steps+=1\n if epoch==0 or (epoch+1)%5==0: print(f'epoch {epoch+1}/{epochs} loss={total/steps:.5f}',flush=True)\n torch.save({'model':model.state_dict(),'dim':DIM,'seed':seed,'epochs':epochs,'stage':stage},checkpoint)\n return model,(uids,item_ids,catalog,histories,packed)\n\n\n@torch.inference_mode()\ndef rank(model, bundle, output: Path):\n uids,item_ids,catalog,histories,packed=bundle; model.eval()\n all_items=model.item_tower(torch.arange(len(item_ids))).cpu()\n rows=[]; batch_size=64\n for start in range(0,len(uids),batch_size):\n urs=np.arange(start,min(start+batch_size,len(uids)))\n B=len(urs); h=np.zeros((B,MAX_HISTORY),np.int64); w=np.zeros((B,MAX_HISTORY,4),np.float32)\n for bi,ur in enumerate(urs):\n cols,ww,_=histories[int(ur)]\n # Deterministic inference keeps the most informative history entries.\n importance=ww[:,0]+ww[:,1]+2*ww[:,2]+ww[:,3].clip(min=0)\n ix=np.argsort(-importance,kind='stable')[:MAX_HISTORY]\n h[bi,:len(ix)]=cols[ix]; w[bi,:len(ix)]=ww[ix]\n uv=model.user_tower(torch.from_numpy(h),torch.from_numpy(w)).cpu()\n scores=uv@all_items.T\n for bi,ur in enumerate(urs):\n mask=np.unpackbits(packed[int(ur)],count=len(item_ids),bitorder='little').astype(bool)\n s=scores[bi].numpy(); s[~mask]=-np.inf\n top=np.argpartition(-s,99)[:100]; top=top[np.argsort(-s[top],kind='stable')]\n rows.extend((int(uids[ur]),int(item_ids[c]),r+1) for r,c in enumerate(top))\n pd.DataFrame(rows,columns=['uid','item_id','rank']).to_parquet(output,index=False)\n print(f'wrote {output} ({len(rows)} rows)',flush=True)\n\n\ndef main():\n ap=argparse.ArgumentParser(); ap.add_argument('--stage',choices=['validation','final'],required=True)\n ap.add_argument('--epochs',type=int,default=20); ap.add_argument('--seed',type=int,default=20260919)\n ap.add_argument('--output',type=Path); a=ap.parse_args()\n output=a.output or HERE/('validation_neural.parquet' if a.stage=='validation' else 'submission.parquet')\n ckpt=HERE/f'model_{a.stage}.pt'\n model,bundle=train_model(a.stage,a.epochs,a.seed,ckpt); rank(model,bundle,output)\n\nif __name__=='__main__': main()\n" } }, "status": "completed", "stdout": "Success. Updated the following files:\nA /app/solution/build_ranker.py\n", "stderr": "" } } ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd3c0809c87d1a9b346420e5eb9e5", "usage": { "input_tokens": 33899, "cached_input_tokens": 31232, "cache_write_input_tokens": 0, "output_tokens": 4675, "reasoning_output_tokens": 1237, "total_tokens": 38574 }, "turn_token_usage": { "input_tokens": 647997, "cached_input_tokens": 605696, "cache_write_input_tokens": 0, "output_tokens": 15013, "reasoning_output_tokens": 6009, "total_tokens": 663010 }, "thread_token_usage": { "input_tokens": 647997, "cached_input_tokens": 605696, "cache_write_input_tokens": 0, "output_tokens": 15013, "reasoning_output_tokens": 6009, "total_tokens": 663010 } } ## Step 40 · agent · 2026-09-19T00:15:19.205Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:15:20.577Z { "code": "const r = await tools.exec_command({cmd:\"/opt/task-venv/bin/python /app/solution/build_ranker.py --stage validation --epochs 15\",\"workdir\":\"/app\",\"yield_time_ms\":30000,\"max_output_tokens\":20000}); text(r.output); if(r.session_id) text(`SESSION_ID=${r.session_id}`);\n" } ### Tool output · 2026-09-19T00:15:27.657Z Script completed Wall time 7.1 seconds Output: Traceback (most recent call last): File "/app/solution/build_ranker.py", line 202, in if __name__=='__main__': main() ^^^^^^ File "/app/solution/build_ranker.py", line 200, in main model,bundle=train_model(a.stage,a.epochs,a.seed,ckpt); rank(model,bundle,output) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/app/solution/build_ranker.py", line 141, in train_model uids,item_ids,catalog,histories=load_histories(stage) ^^^^^^^^^^^^^^^^^^^^^ File "/app/solution/build_ranker.py", line 107, in load_histories target=np.flatnonzero((w[:,0] > 0) | (w[:,2] > 0)).astype(np.int64) ~^^^^^ IndexError: too many indices for array: array is 1-dimensional, but 2 were indexed ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd415dde087d18069c644f1a2d89e", "usage": { "input_tokens": 38598, "cached_input_tokens": 33664, "cache_write_input_tokens": 0, "output_tokens": 97, "reasoning_output_tokens": 13, "total_tokens": 38695 }, "turn_token_usage": { "input_tokens": 686595, "cached_input_tokens": 639360, "cache_write_input_tokens": 0, "output_tokens": 15110, "reasoning_output_tokens": 6022, "total_tokens": 701705 }, "thread_token_usage": { "input_tokens": 686595, "cached_input_tokens": 639360, "cache_write_input_tokens": 0, "output_tokens": 15110, "reasoning_output_tokens": 6022, "total_tokens": 701705 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-c4ecb7c1-e795-40ee-9163-296e5fec163c", "process_id": "92107", "command": [ "/bin/sh", "-lc", "/opt/task-venv/bin/python /app/solution/build_ranker.py --stage validation --epochs 15" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "/opt/task-venv/bin/python /app/solution/build_ranker.py --stage validation --epochs 15" } ], "source": "unified_exec_startup", "status": "failed", "stdout": "Traceback (most recent call last):\n File \"/app/solution/build_ranker.py\", line 202, in \n if __name__=='__main__': main()\n ^^^^^^\n File \"/app/solution/build_ranker.py\", line 200, in main\n model,bundle=train_model(a.stage,a.epochs,a.seed,ckpt); rank(model,bundle,output)\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n File \"/app/solution/build_ranker.py\", line 141, in train_model\n uids,item_ids,catalog,histories=load_histories(stage)\n ^^^^^^^^^^^^^^^^^^^^^\n File \"/app/solution/build_ranker.py\", line 107, in load_histories\n target=np.flatnonzero((w[:,0] > 0) | (w[:,2] > 0)).astype(np.int64)\n ~^^^^^\nIndexError: too many indices for array: array is 1-dimensional, but 2 were indexed\n", "stderr": "", "aggregated_output": "Traceback (most recent call last):\n File \"/app/solution/build_ranker.py\", line 202, in \n if __name__=='__main__': main()\n ^^^^^^\n File \"/app/solution/build_ranker.py\", line 200, in main\n model,bundle=train_model(a.stage,a.epochs,a.seed,ckpt); rank(model,bundle,output)\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n File \"/app/solution/build_ranker.py\", line 141, in train_model\n uids,item_ids,catalog,histories=load_histories(stage)\n ^^^^^^^^^^^^^^^^^^^^^\n File \"/app/solution/build_ranker.py\", line 107, in load_histories\n target=np.flatnonzero((w[:,0] > 0) | (w[:,2] > 0)).astype(np.int64)\n ~^^^^^\nIndexError: too many indices for array: array is 1-dimensional, but 2 were indexed\n", "exit_code": 1, "duration": { "secs": 6, "nanos": 911929414 }, "formatted_output": "Traceback (most recent call last):\n File \"/app/solution/build_ranker.py\", line 202, in \n if __name__=='__main__': main()\n ^^^^^^\n File \"/app/solution/build_ranker.py\", line 200, in main\n model,bundle=train_model(a.stage,a.epochs,a.seed,ckpt); rank(model,bundle,output)\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n File \"/app/solution/build_ranker.py\", line 141, in train_model\n uids,item_ids,catalog,histories=load_histories(stage)\n ^^^^^^^^^^^^^^^^^^^^^\n File \"/app/solution/build_ranker.py\", line 107, in load_histories\n target=np.flatnonzero((w[:,0] > 0) | (w[:,2] > 0)).astype(np.int64)\n ~^^^^^\nIndexError: too many indices for array: array is 1-dimensional, but 2 were indexed\n" } } ## Step 41 · agent · 2026-09-19T00:15:31.794Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:15:34.418Z { "code": "const patch = \"*** Begin Patch\\n*** Update File: /app/solution/build_ranker.py\\n@@\\n- w=np.asarray(list(entries.values()),dtype=np.float32)\\n+ w=np.asarray(list(entries.values()),dtype=np.float32).reshape(-1,4)\\n@@\\n- target=np.flatnonzero((w[:,0] > 0) | (w[:,2] > 0)).astype(np.int64)\\n+ target=np.flatnonzero((w[:,0] > 0) | (w[:,2] > 0)).astype(np.int64)\\n+ if not len(target):\\n+ # Defensive cold-start row; target_users normally have catalog history.\\n+ cols=np.asarray([0],dtype=np.int64); w=np.asarray([[1.,1.,0.,0.]],dtype=np.float32); target=np.asarray([0])\\n*** End Patch\";\ntext(await tools.apply_patch(patch));\n" } ### Tool output · 2026-09-19T00:15:34.492Z Script completed Wall time 0.0 seconds Output: {} ### Harness context { "type": "codex_item_completed", "item": { "type": "FileChange", "id": "exec-ffc8f37a-f0a3-4b00-a9fa-993a2e7895a1", "changes": { "/app/solution/build_ranker.py": { "type": "update", "unified_diff": "@@ -104,5 +104,8 @@\n cols=np.fromiter(entries.keys(),dtype=np.int64)\n- w=np.asarray(list(entries.values()),dtype=np.float32)\n+ w=np.asarray(list(entries.values()),dtype=np.float32).reshape(-1,4)\n # Positive targets require a listen or active like, never dislikes alone.\n target=np.flatnonzero((w[:,0] > 0) | (w[:,2] > 0)).astype(np.int64)\n+ if not len(target):\n+ # Defensive cold-start row; target_users normally have catalog history.\n+ cols=np.asarray([0],dtype=np.int64); w=np.asarray([[1.,1.,0.,0.]],dtype=np.float32); target=np.asarray([0])\n histories.append((cols,w,target))\n", "move_path": null } }, "status": "completed", "stdout": "Success. Updated the following files:\nM /app/solution/build_ranker.py\n", "stderr": "" } } ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd41fd19087d183b32d036a850703", "usage": { "input_tokens": 38929, "cached_input_tokens": 38400, "cache_write_input_tokens": 0, "output_tokens": 313, "reasoning_output_tokens": 99, "total_tokens": 39242 }, "turn_token_usage": { "input_tokens": 725524, "cached_input_tokens": 677760, "cache_write_input_tokens": 0, "output_tokens": 15423, "reasoning_output_tokens": 6121, "total_tokens": 740947 }, "thread_token_usage": { "input_tokens": 725524, "cached_input_tokens": 677760, "cache_write_input_tokens": 0, "output_tokens": 15423, "reasoning_output_tokens": 6121, "total_tokens": 740947 } } ## Step 42 · agent · 2026-09-19T00:15:37.492Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:15:38.727Z { "code": "const r = await tools.exec_command({cmd:\"/opt/task-venv/bin/python /app/solution/build_ranker.py --stage validation --epochs 15\",\"workdir\":\"/app\",\"yield_time_ms\":30000,\"max_output_tokens\":20000}); text(r.output); if(r.session_id) text(`SESSION_ID=${r.session_id}`);\n" } ### Tool output · 2026-09-19T00:16:08.893Z Script completed Wall time 30.2 seconds Output: /app/solution/build_ranker.py:166: UserWarning: Converting a tensor with requires_grad=True to a scalar may lead to unexpected behavior. Consider using tensor.detach() first. (Triggered internally at /pytorch/torch/csrc/autograd/generated/python_variable_methods.cpp:835.) total+=float(loss); steps+=1 SESSION_ID=10464 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd426cf7487d186cb98bcecf33f38", "usage": { "input_tokens": 39266, "cached_input_tokens": 38784, "cache_write_input_tokens": 0, "output_tokens": 123, "reasoning_output_tokens": 39, "total_tokens": 39389 }, "turn_token_usage": { "input_tokens": 764790, "cached_input_tokens": 716544, "cache_write_input_tokens": 0, "output_tokens": 15546, "reasoning_output_tokens": 6160, "total_tokens": 780336 }, "thread_token_usage": { "input_tokens": 764790, "cached_input_tokens": 716544, "cache_write_input_tokens": 0, "output_tokens": 15546, "reasoning_output_tokens": 6160, "total_tokens": 780336 } } ## Step 43 · agent · 2026-09-19T00:16:11.107Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:16:11.650Z { "code": "const r = await tools.write_stdin({session_id:10464,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:16:41.659Z Script completed Wall time 30.0 seconds Output: epoch 1/15 loss=0.74258 epoch 5/15 loss=0.49725 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd449107087d1a25dbfe87b8df437", "usage": { "input_tokens": 39485, "cached_input_tokens": 39040, "cache_write_input_tokens": 0, "output_tokens": 93, "reasoning_output_tokens": 46, "total_tokens": 39578 }, "turn_token_usage": { "input_tokens": 804275, "cached_input_tokens": 755584, "cache_write_input_tokens": 0, "output_tokens": 15639, "reasoning_output_tokens": 6206, "total_tokens": 819914 }, "thread_token_usage": { "input_tokens": 804275, "cached_input_tokens": 755584, "cache_write_input_tokens": 0, "output_tokens": 15639, "reasoning_output_tokens": 6206, "total_tokens": 819914 } } ## Step 44 · agent · 2026-09-19T00:16:43.286Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:16:43.913Z { "code": "const r = await tools.write_stdin({session_id:10464,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:17:08.402Z Script completed Wall time 24.5 seconds Output: epoch 10/15 loss=0.38022 epoch 15/15 loss=0.28857 wrote /app/solution/validation_neural.parquet (845600 rows) ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd469e6b887d1bf8ebe98caeb07e7", "usage": { "input_tokens": 39625, "cached_input_tokens": 39296, "cache_write_input_tokens": 0, "output_tokens": 64, "reasoning_output_tokens": 17, "total_tokens": 39689 }, "turn_token_usage": { "input_tokens": 843900, "cached_input_tokens": 794880, "cache_write_input_tokens": 0, "output_tokens": 15703, "reasoning_output_tokens": 6223, "total_tokens": 859603 }, "thread_token_usage": { "input_tokens": 843900, "cached_input_tokens": 794880, "cache_write_input_tokens": 0, "output_tokens": 15703, "reasoning_output_tokens": 6223, "total_tokens": 859603 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-0d07a69a-65d0-456f-9046-f909e55fd3d9", "process_id": "10464", "command": [ "/bin/sh", "-lc", "/opt/task-venv/bin/python /app/solution/build_ranker.py --stage validation --epochs 15" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "/opt/task-venv/bin/python /app/solution/build_ranker.py --stage validation --epochs 15" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "/app/solution/build_ranker.py:166: UserWarning: Converting a tensor with requires_grad=True to a scalar may lead to unexpected behavior.\nConsider using tensor.detach() first. (Triggered internally at /pytorch/torch/csrc/autograd/generated/python_variable_methods.cpp:835.)\n total+=float(loss); steps+=1\nepoch 1/15 loss=0.74258\nepoch 5/15 loss=0.49725\nepoch 10/15 loss=0.38022\nepoch 15/15 loss=0.28857\nwrote /app/solution/validation_neural.parquet (845600 rows)\n", "stderr": "", "aggregated_output": "/app/solution/build_ranker.py:166: UserWarning: Converting a tensor with requires_grad=True to a scalar may lead to unexpected behavior.\nConsider using tensor.detach() first. (Triggered internally at /pytorch/torch/csrc/autograd/generated/python_variable_methods.cpp:835.)\n total+=float(loss); steps+=1\nepoch 1/15 loss=0.74258\nepoch 5/15 loss=0.49725\nepoch 10/15 loss=0.38022\nepoch 15/15 loss=0.28857\nwrote /app/solution/validation_neural.parquet (845600 rows)\n", "exit_code": 0, "duration": { "secs": 89, "nanos": 508552630 }, "formatted_output": "/app/solution/build_ranker.py:166: UserWarning: Converting a tensor with requires_grad=True to a scalar may lead to unexpected behavior.\nConsider using tensor.detach() first. (Triggered internally at /pytorch/torch/csrc/autograd/generated/python_variable_methods.cpp:835.)\n total+=float(loss); steps+=1\nepoch 1/15 loss=0.74258\nepoch 5/15 loss=0.49725\nepoch 10/15 loss=0.38022\nepoch 15/15 loss=0.28857\nwrote /app/solution/validation_neural.parquet (845600 rows)\n" } } ## Step 45 · agent · 2026-09-19T00:17:09.626Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:17:10.767Z { "code": "const r = await tools.exec_command({cmd:\"/opt/task-venv/bin/python /task/evaluate_public.py /app/solution/validation_neural.parquet\",\"workdir\":\"/app\",\"yield_time_ms\":30000,\"max_output_tokens\":10000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:17:14.157Z Script completed Wall time 3.4 seconds Output: { "model": "/app/solution/validation_neural.parquet", "scores": { "quality_ndcg@10": 0.013287, "quality_users": 4263 } } ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd484998887d189a32e971367f880", "usage": { "input_tokens": 39753, "cached_input_tokens": 39424, "cache_write_input_tokens": 0, "output_tokens": 77, "reasoning_output_tokens": 6, "total_tokens": 39830 }, "turn_token_usage": { "input_tokens": 883653, "cached_input_tokens": 834304, "cache_write_input_tokens": 0, "output_tokens": 15780, "reasoning_output_tokens": 6229, "total_tokens": 899433 }, "thread_token_usage": { "input_tokens": 883653, "cached_input_tokens": 834304, "cache_write_input_tokens": 0, "output_tokens": 15780, "reasoning_output_tokens": 6229, "total_tokens": 899433 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-901d317e-03e8-40b2-a14e-7e7b194089d0", "process_id": "75959", "command": [ "/bin/sh", "-lc", "/opt/task-venv/bin/python /task/evaluate_public.py /app/solution/validation_neural.parquet" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "/opt/task-venv/bin/python /task/evaluate_public.py /app/solution/validation_neural.parquet" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "{\n \"model\": \"/app/solution/validation_neural.parquet\",\n \"scores\": {\n \"quality_ndcg@10\": 0.013287,\n \"quality_users\": 4263\n }\n}\n", "stderr": "", "aggregated_output": "{\n \"model\": \"/app/solution/validation_neural.parquet\",\n \"scores\": {\n \"quality_ndcg@10\": 0.013287,\n \"quality_users\": 4263\n }\n}\n", "exit_code": 0, "duration": { "secs": 3, "nanos": 223193568 }, "formatted_output": "{\n \"model\": \"/app/solution/validation_neural.parquet\",\n \"scores\": {\n \"quality_ndcg@10\": 0.013287,\n \"quality_users\": 4263\n }\n}\n" } } ## Step 46 · agent · 2026-09-19T00:17:29.527Z ### Thinking unavailable — no text recorded ## Step 47 · agent · 2026-09-19T00:17:42.078Z ### Thinking unavailable — no text recorded The first true two-tower run improves public NDCG@10 from 0.010710 to 0.013287 while preserving the serving decomposition. The loss is still falling. I also found one underused signal: the training objective grades organic likes much more heavily, but the initial model only used active preference state, not the full historical like stream. I’m adding that grade-aligned supervision before the longer run. ### exec · 2026-09-19T00:17:48.439Z { "code": "const patch = \"*** Begin Patch\\n*** Update File: /app/solution/build_ranker.py\\n@@\\n def load_histories(stage: str):\\n@@\\n agg = pd.read_parquet(HERE/'history_agg.parquet')\\n+ # Historical explicit likes are high-value discovery supervision (grade 3).\\n+ like_parts=[]\\n+ for split in (['train','val'] if stage=='final' else ['train']):\\n+ lk=pd.read_parquet(DATA/f'{split}_likes.parquet',columns=['uid','item_id','is_organic'])\\n+ lk=lk[lk.uid.isin(target_uids)&lk.item_id.isin(item_ids)].copy()\\n+ lk['like_weight']=np.where(lk.is_organic.eq(1),3.0,1.0).astype(np.float32)\\n+ like_parts.append(lk[['uid','item_id','like_weight']])\\n+ likes=pd.concat(like_parts,ignore_index=True).groupby(['uid','item_id'],sort=False).like_weight.sum().reset_index()\\n+ like_groups={int(u):g for u,g in likes.groupby('uid',sort=False)}\\n@@\\n pg=pref_groups.get(int(uid))\\n@@\\n if r.pval > 0: entries[c][2] += 2.5*float(r.pval)\\n+ lg=like_groups.get(int(uid))\\n+ if lg is not None:\\n+ for r in lg.itertuples(index=False):\\n+ c=item_col.get(int(r.item_id))\\n+ if c is None: continue\\n+ if c not in entries: entries[c]=[0.,0.,0.,0.]\\n+ entries[c][2] += 1.75*math.log1p(float(r.like_weight))\\n*** End Patch\";\ntext(await tools.apply_patch(patch));\n" } ### Tool output · 2026-09-19T00:17:48.488Z Script completed Wall time 0.0 seconds Output: {} ### Harness context { "type": "codex_item_completed", "item": { "type": "FileChange", "id": "exec-7a3e3679-2034-4d77-8e02-7e6f3a113013", "changes": { "/app/solution/build_ranker.py": { "type": "update", "unified_diff": "@@ -67,2 +67,11 @@\n agg = pd.read_parquet(HERE/'history_agg.parquet')\n+ # Historical explicit likes are high-value discovery supervision (grade 3).\n+ like_parts=[]\n+ for split in (['train','val'] if stage=='final' else ['train']):\n+ lk=pd.read_parquet(DATA/f'{split}_likes.parquet',columns=['uid','item_id','is_organic'])\n+ lk=lk[lk.uid.isin(target_uids)&lk.item_id.isin(item_ids)].copy()\n+ lk['like_weight']=np.where(lk.is_organic.eq(1),3.0,1.0).astype(np.float32)\n+ like_parts.append(lk[['uid','item_id','like_weight']])\n+ likes=pd.concat(like_parts,ignore_index=True).groupby(['uid','item_id'],sort=False).like_weight.sum().reset_index()\n+ like_groups={int(u):g for u,g in likes.groupby('uid',sort=False)}\n # Add validation outcomes only for final refitting.\n@@ -103,2 +112,9 @@\n if r.pval > 0: entries[c][2] += 2.5*float(r.pval)\n+ lg=like_groups.get(int(uid))\n+ if lg is not None:\n+ for r in lg.itertuples(index=False):\n+ c=item_col.get(int(r.item_id))\n+ if c is None: continue\n+ if c not in entries: entries[c]=[0.,0.,0.,0.]\n+ entries[c][2] += 1.75*math.log1p(float(r.like_weight))\n cols=np.fromiter(entries.keys(),dtype=np.int64)\n", "move_path": null } }, "status": "completed", "stdout": "Success. Updated the following files:\nM /app/solution/build_ranker.py\n", "stderr": "" } } ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd48a7c6487d1aae6f6157feb45ff", "usage": { "input_tokens": 39900, "cached_input_tokens": 39552, "cache_write_input_tokens": 0, "output_tokens": 1541, "reasoning_output_tokens": 1017, "total_tokens": 41441 }, "turn_token_usage": { "input_tokens": 923553, "cached_input_tokens": 873856, "cache_write_input_tokens": 0, "output_tokens": 17321, "reasoning_output_tokens": 7246, "total_tokens": 940874 }, "thread_token_usage": { "input_tokens": 923553, "cached_input_tokens": 873856, "cache_write_input_tokens": 0, "output_tokens": 17321, "reasoning_output_tokens": 7246, "total_tokens": 940874 } } ## Step 48 · agent · 2026-09-19T00:17:49.870Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:17:51.480Z { "code": "const r = await tools.exec_command({cmd:\"/opt/task-venv/bin/python /app/solution/build_ranker.py --stage validation --epochs 25 --output /app/solution/validation_neural_likes.parquet\",\"workdir\":\"/app\",\"yield_time_ms\":30000,\"max_output_tokens\":20000}); text(r.output); if(r.session_id) text(`SESSION_ID=${r.session_id}`);\n" } ### Tool output · 2026-09-19T00:18:21.647Z Script completed Wall time 30.2 seconds Output: /app/solution/build_ranker.py:182: UserWarning: Converting a tensor with requires_grad=True to a scalar may lead to unexpected behavior. Consider using tensor.detach() first. (Triggered internally at /pytorch/torch/csrc/autograd/generated/python_variable_methods.cpp:835.) total+=float(loss); steps+=1 SESSION_ID=38079 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd4acc45c87d19b99633867625243", "usage": { "input_tokens": 41465, "cached_input_tokens": 39680, "cache_write_input_tokens": 0, "output_tokens": 107, "reasoning_output_tokens": 9, "total_tokens": 41572 }, "turn_token_usage": { "input_tokens": 965018, "cached_input_tokens": 913536, "cache_write_input_tokens": 0, "output_tokens": 17428, "reasoning_output_tokens": 7255, "total_tokens": 982446 }, "thread_token_usage": { "input_tokens": 965018, "cached_input_tokens": 913536, "cache_write_input_tokens": 0, "output_tokens": 17428, "reasoning_output_tokens": 7255, "total_tokens": 982446 } } ## Step 49 · agent · 2026-09-19T00:18:22.739Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:18:23.454Z { "code": "const r = await tools.write_stdin({session_id:38079,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:18:53.463Z Script completed Wall time 30.0 seconds Output: epoch 1/25 loss=0.73188 epoch 5/25 loss=0.50008 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd4cdd28c87d1ae41c28579acb2e9", "usage": { "input_tokens": 41668, "cached_input_tokens": 41344, "cache_write_input_tokens": 0, "output_tokens": 53, "reasoning_output_tokens": 6, "total_tokens": 41721 }, "turn_token_usage": { "input_tokens": 1006686, "cached_input_tokens": 954880, "cache_write_input_tokens": 0, "output_tokens": 17481, "reasoning_output_tokens": 7261, "total_tokens": 1024167 }, "thread_token_usage": { "input_tokens": 1006686, "cached_input_tokens": 954880, "cache_write_input_tokens": 0, "output_tokens": 17481, "reasoning_output_tokens": 7261, "total_tokens": 1024167 } } ## Step 50 · agent · 2026-09-19T00:18:54.631Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:18:55.325Z { "code": "const r = await tools.write_stdin({session_id:38079,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:19:25.334Z Script completed Wall time 30.0 seconds Output: epoch 10/25 loss=0.35810 epoch 15/25 loss=0.27068 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd4edb8ec87d182e406491ee990c7", "usage": { "input_tokens": 41768, "cached_input_tokens": 41472, "cache_write_input_tokens": 0, "output_tokens": 53, "reasoning_output_tokens": 6, "total_tokens": 41821 }, "turn_token_usage": { "input_tokens": 1048454, "cached_input_tokens": 996352, "cache_write_input_tokens": 0, "output_tokens": 17534, "reasoning_output_tokens": 7267, "total_tokens": 1065988 }, "thread_token_usage": { "input_tokens": 1048454, "cached_input_tokens": 996352, "cache_write_input_tokens": 0, "output_tokens": 17534, "reasoning_output_tokens": 7267, "total_tokens": 1065988 } } ## Step 51 · agent · 2026-09-19T00:19:26.456Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:19:27.132Z { "code": "const r = await tools.write_stdin({session_id:38079,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:19:57.141Z Script completed Wall time 30.0 seconds Output: epoch 20/25 loss=0.23330 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd50d7ed887d18c972962629d0110", "usage": { "input_tokens": 41868, "cached_input_tokens": 41600, "cache_write_input_tokens": 0, "output_tokens": 53, "reasoning_output_tokens": 6, "total_tokens": 41921 }, "turn_token_usage": { "input_tokens": 1090322, "cached_input_tokens": 1037952, "cache_write_input_tokens": 0, "output_tokens": 17587, "reasoning_output_tokens": 7273, "total_tokens": 1107909 }, "thread_token_usage": { "input_tokens": 1090322, "cached_input_tokens": 1037952, "cache_write_input_tokens": 0, "output_tokens": 17587, "reasoning_output_tokens": 7273, "total_tokens": 1107909 } } ## Step 52 · agent · 2026-09-19T00:19:58.546Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:19:59.275Z { "code": "const r = await tools.write_stdin({session_id:38079,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:20:01.423Z Script completed Wall time 2.1 seconds Output: epoch 25/25 loss=0.21258 wrote /app/solution/validation_neural_likes.parquet (845600 rows) ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd52d572487d181aa94424bef02f5", "usage": { "input_tokens": 41956, "cached_input_tokens": 41728, "cache_write_input_tokens": 0, "output_tokens": 53, "reasoning_output_tokens": 6, "total_tokens": 42009 }, "turn_token_usage": { "input_tokens": 1132278, "cached_input_tokens": 1079680, "cache_write_input_tokens": 0, "output_tokens": 17640, "reasoning_output_tokens": 7279, "total_tokens": 1149918 }, "thread_token_usage": { "input_tokens": 1132278, "cached_input_tokens": 1079680, "cache_write_input_tokens": 0, "output_tokens": 17640, "reasoning_output_tokens": 7279, "total_tokens": 1149918 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-83851389-946e-437a-9df7-573fecdc3284", "process_id": "38079", "command": [ "/bin/sh", "-lc", "/opt/task-venv/bin/python /app/solution/build_ranker.py --stage validation --epochs 25 --output /app/solution/validation_neural_likes.parquet" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "/opt/task-venv/bin/python /app/solution/build_ranker.py --stage validation --epochs 25 --output /app/solution/validation_neural_likes.parquet" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "/app/solution/build_ranker.py:182: UserWarning: Converting a tensor with requires_grad=True to a scalar may lead to unexpected behavior.\nConsider using tensor.detach() first. (Triggered internally at /pytorch/torch/csrc/autograd/generated/python_variable_methods.cpp:835.)\n total+=float(loss); steps+=1\nepoch 1/25 loss=0.73188\nepoch 5/25 loss=0.50008\nepoch 10/25 loss=0.35810\nepoch 15/25 loss=0.27068\nepoch 20/25 loss=0.23330\nepoch 25/25 loss=0.21258\nwrote /app/solution/validation_neural_likes.parquet (845600 rows)\n", "stderr": "", "aggregated_output": "/app/solution/build_ranker.py:182: UserWarning: Converting a tensor with requires_grad=True to a scalar may lead to unexpected behavior.\nConsider using tensor.detach() first. (Triggered internally at /pytorch/torch/csrc/autograd/generated/python_variable_methods.cpp:835.)\n total+=float(loss); steps+=1\nepoch 1/25 loss=0.73188\nepoch 5/25 loss=0.50008\nepoch 10/25 loss=0.35810\nepoch 15/25 loss=0.27068\nepoch 20/25 loss=0.23330\nepoch 25/25 loss=0.21258\nwrote /app/solution/validation_neural_likes.parquet (845600 rows)\n", "exit_code": 0, "duration": { "secs": 129, "nanos": 777990444 }, "formatted_output": "/app/solution/build_ranker.py:182: UserWarning: Converting a tensor with requires_grad=True to a scalar may lead to unexpected behavior.\nConsider using tensor.detach() first. (Triggered internally at /pytorch/torch/csrc/autograd/generated/python_variable_methods.cpp:835.)\n total+=float(loss); steps+=1\nepoch 1/25 loss=0.73188\nepoch 5/25 loss=0.50008\nepoch 10/25 loss=0.35810\nepoch 15/25 loss=0.27068\nepoch 20/25 loss=0.23330\nepoch 25/25 loss=0.21258\nwrote /app/solution/validation_neural_likes.parquet (845600 rows)\n" } } ## Step 53 · agent · 2026-09-19T00:20:02.717Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:20:03.875Z { "code": "const r = await tools.exec_command({cmd:\"/opt/task-venv/bin/python /task/evaluate_public.py /app/solution/validation_neural_likes.parquet\",\"workdir\":\"/app\",\"yield_time_ms\":30000,\"max_output_tokens\":10000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:20:07.250Z Script completed Wall time 3.4 seconds Output: { "model": "/app/solution/validation_neural_likes.parquet", "scores": { "quality_ndcg@10": 0.01438, "quality_users": 4263 } } ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd531996887d180894f8f153413d6", "usage": { "input_tokens": 42063, "cached_input_tokens": 41728, "cache_write_input_tokens": 0, "output_tokens": 79, "reasoning_output_tokens": 6, "total_tokens": 42142 }, "turn_token_usage": { "input_tokens": 1174341, "cached_input_tokens": 1121408, "cache_write_input_tokens": 0, "output_tokens": 17719, "reasoning_output_tokens": 7285, "total_tokens": 1192060 }, "thread_token_usage": { "input_tokens": 1174341, "cached_input_tokens": 1121408, "cache_write_input_tokens": 0, "output_tokens": 17719, "reasoning_output_tokens": 7285, "total_tokens": 1192060 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-744f3c56-0d14-4840-a1dd-1e1c259a48ff", "process_id": "56741", "command": [ "/bin/sh", "-lc", "/opt/task-venv/bin/python /task/evaluate_public.py /app/solution/validation_neural_likes.parquet" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "/opt/task-venv/bin/python /task/evaluate_public.py /app/solution/validation_neural_likes.parquet" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "{\n \"model\": \"/app/solution/validation_neural_likes.parquet\",\n \"scores\": {\n \"quality_ndcg@10\": 0.01438,\n \"quality_users\": 4263\n }\n}\n", "stderr": "", "aggregated_output": "{\n \"model\": \"/app/solution/validation_neural_likes.parquet\",\n \"scores\": {\n \"quality_ndcg@10\": 0.01438,\n \"quality_users\": 4263\n }\n}\n", "exit_code": 0, "duration": { "secs": 3, "nanos": 207175831 }, "formatted_output": "{\n \"model\": \"/app/solution/validation_neural_likes.parquet\",\n \"scores\": {\n \"quality_ndcg@10\": 0.01438,\n \"quality_users\": 4263\n }\n}\n" } } ## Step 54 · agent · 2026-09-19T00:20:18.555Z ### Thinking unavailable — no text recorded Historical organic-like supervision lifts public NDCG@10 again, to 0.014380. I’ll now test a second random seed and a dot-product-preserving ensemble: concatenating the two user vectors and the two item vectors makes their averaged score still one exact inner product, while usually reducing sampling variance. I’ll also test only small catalog-prior blends, since popularity alone is demonstrably weak. ### exec · 2026-09-19T00:20:33.534Z { "code": "const patch = \"*** Begin Patch\\n*** Add File: /app/solution/rerank_ensemble.py\\n+#!/usr/bin/env python3\\n+\\\"\\\"\\\"Apply a score-equivalent concatenated two-tower ensemble and prior probes.\\\"\\\"\\\"\\n+import argparse\\n+from pathlib import Path\\n+import numpy as np\\n+import pandas as pd\\n+import torch\\n+import build_ranker as br\\n+\\n+@torch.inference_mode()\\n+def main():\\n+ ap=argparse.ArgumentParser(); ap.add_argument('--stage',choices=['validation','final'],required=True)\\n+ ap.add_argument('--checkpoints',nargs='+',type=Path,required=True)\\n+ ap.add_argument('--prefix',type=Path,required=True)\\n+ ap.add_argument('--alphas',nargs='+',type=float,default=[0.0])\\n+ a=ap.parse_args(); torch.set_num_threads(12)\\n+ uids,item_ids,catalog,histories=br.load_histories(a.stage)\\n+ euids,eitems,packed=br.load_eligibility(a.stage)\\n+ models=[]; item_vec=[]\\n+ for cp in a.checkpoints:\\n+ m=br.TwoTower(len(item_ids)); m.load_state_dict(torch.load(cp,map_location='cpu',weights_only=True)['model']); m.eval(); models.append(m)\\n+ item_vec.append(m.item_tower(torch.arange(len(item_ids))))\\n+ prior=(np.log(len(item_ids)+1)-np.log(catalog.popularity_rank.to_numpy(np.float32)+1))/np.log(len(item_ids)+1)\\n+ outs={x:[] for x in a.alphas}; bs=64\\n+ for start in range(0,len(uids),bs):\\n+ urs=np.arange(start,min(start+bs,len(uids))); B=len(urs)\\n+ h=np.zeros((B,br.MAX_HISTORY),np.int64); w=np.zeros((B,br.MAX_HISTORY,4),np.float32)\\n+ for bi,ur in enumerate(urs):\\n+ cols,ww,_=histories[int(ur)]; importance=ww[:,0]+ww[:,1]+2*ww[:,2]+ww[:,3].clip(min=0)\\n+ ix=np.argsort(-importance,kind='stable')[:br.MAX_HISTORY]\\n+ h[bi,:len(ix)]=cols[ix]; w[bi,:len(ix)]=ww[ix]\\n+ scores=sum(m.user_tower(torch.from_numpy(h),torch.from_numpy(w))@iv.T for m,iv in zip(models,item_vec))/len(models)\\n+ scores=scores.numpy()\\n+ for bi,ur in enumerate(urs):\\n+ mask=np.unpackbits(packed[int(ur)],count=len(item_ids),bitorder='little').astype(bool)\\n+ for alpha in a.alphas:\\n+ s=scores[bi]+alpha*prior; s=np.where(mask,s,-np.inf)\\n+ top=np.argpartition(-s,99)[:100]; top=top[np.argsort(-s[top],kind='stable')]\\n+ outs[alpha].extend((int(uids[ur]),int(item_ids[c]),r+1) for r,c in enumerate(top))\\n+ for alpha,rows in outs.items():\\n+ out=Path(str(a.prefix)+f'_a{alpha:g}.parquet')\\n+ pd.DataFrame(rows,columns=['uid','item_id','rank']).to_parquet(out,index=False); print(out)\\n+\\n+if __name__=='__main__': main()\\n*** End Patch\";\ntext(await tools.apply_patch(patch));\n" } ### Tool output · 2026-09-19T00:20:33.600Z Script completed Wall time 0.0 seconds Output: {} ### Harness context { "type": "codex_item_completed", "item": { "type": "FileChange", "id": "exec-065e1dc4-e34c-4f65-b8c3-53ae546c459d", "changes": { "/app/solution/rerank_ensemble.py": { "type": "add", "content": "#!/usr/bin/env python3\n\"\"\"Apply a score-equivalent concatenated two-tower ensemble and prior probes.\"\"\"\nimport argparse\nfrom pathlib import Path\nimport numpy as np\nimport pandas as pd\nimport torch\nimport build_ranker as br\n\n@torch.inference_mode()\ndef main():\n ap=argparse.ArgumentParser(); ap.add_argument('--stage',choices=['validation','final'],required=True)\n ap.add_argument('--checkpoints',nargs='+',type=Path,required=True)\n ap.add_argument('--prefix',type=Path,required=True)\n ap.add_argument('--alphas',nargs='+',type=float,default=[0.0])\n a=ap.parse_args(); torch.set_num_threads(12)\n uids,item_ids,catalog,histories=br.load_histories(a.stage)\n euids,eitems,packed=br.load_eligibility(a.stage)\n models=[]; item_vec=[]\n for cp in a.checkpoints:\n m=br.TwoTower(len(item_ids)); m.load_state_dict(torch.load(cp,map_location='cpu',weights_only=True)['model']); m.eval(); models.append(m)\n item_vec.append(m.item_tower(torch.arange(len(item_ids))))\n prior=(np.log(len(item_ids)+1)-np.log(catalog.popularity_rank.to_numpy(np.float32)+1))/np.log(len(item_ids)+1)\n outs={x:[] for x in a.alphas}; bs=64\n for start in range(0,len(uids),bs):\n urs=np.arange(start,min(start+bs,len(uids))); B=len(urs)\n h=np.zeros((B,br.MAX_HISTORY),np.int64); w=np.zeros((B,br.MAX_HISTORY,4),np.float32)\n for bi,ur in enumerate(urs):\n cols,ww,_=histories[int(ur)]; importance=ww[:,0]+ww[:,1]+2*ww[:,2]+ww[:,3].clip(min=0)\n ix=np.argsort(-importance,kind='stable')[:br.MAX_HISTORY]\n h[bi,:len(ix)]=cols[ix]; w[bi,:len(ix)]=ww[ix]\n scores=sum(m.user_tower(torch.from_numpy(h),torch.from_numpy(w))@iv.T for m,iv in zip(models,item_vec))/len(models)\n scores=scores.numpy()\n for bi,ur in enumerate(urs):\n mask=np.unpackbits(packed[int(ur)],count=len(item_ids),bitorder='little').astype(bool)\n for alpha in a.alphas:\n s=scores[bi]+alpha*prior; s=np.where(mask,s,-np.inf)\n top=np.argpartition(-s,99)[:100]; top=top[np.argsort(-s[top],kind='stable')]\n outs[alpha].extend((int(uids[ur]),int(item_ids[c]),r+1) for r,c in enumerate(top))\n for alpha,rows in outs.items():\n out=Path(str(a.prefix)+f'_a{alpha:g}.parquet')\n pd.DataFrame(rows,columns=['uid','item_id','rank']).to_parquet(out,index=False); print(out)\n\nif __name__=='__main__': main()\n" } }, "status": "completed", "stdout": "Success. Updated the following files:\nA /app/solution/rerank_ensemble.py\n", "stderr": "" } } ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd5376ff087d18bed4ef58c3bda4f", "usage": { "input_tokens": 42214, "cached_input_tokens": 29824, "cache_write_input_tokens": 0, "output_tokens": 1408, "reasoning_output_tokens": 507, "total_tokens": 43622 }, "turn_token_usage": { "input_tokens": 1216555, "cached_input_tokens": 1151232, "cache_write_input_tokens": 0, "output_tokens": 19127, "reasoning_output_tokens": 7792, "total_tokens": 1235682 }, "thread_token_usage": { "input_tokens": 1216555, "cached_input_tokens": 1151232, "cache_write_input_tokens": 0, "output_tokens": 19127, "reasoning_output_tokens": 7792, "total_tokens": 1235682 } } ## Step 55 · agent · 2026-09-19T00:20:35.766Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:20:37.796Z { "code": "const r = await tools.exec_command({cmd:\"cp /app/solution/model_validation.pt /app/solution/model_validation_seed20260919.pt && /opt/task-venv/bin/python /app/solution/build_ranker.py --stage validation --epochs 25 --seed 37 --output /app/solution/validation_neural_seed37.parquet\",\"workdir\":\"/app\",\"yield_time_ms\":30000,\"max_output_tokens\":20000}); text(r.output); if(r.session_id) text(`SESSION_ID=${r.session_id}`);\n" } ### Tool output · 2026-09-19T00:21:07.963Z Script completed Wall time 30.2 seconds Output: /app/solution/build_ranker.py:182: UserWarning: Converting a tensor with requires_grad=True to a scalar may lead to unexpected behavior. Consider using tensor.detach() first. (Triggered internally at /pytorch/torch/csrc/autograd/generated/python_variable_methods.cpp:835.) total+=float(loss); steps+=1 SESSION_ID=68425 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd551f82c87d190e290f5ab22bcd5", "usage": { "input_tokens": 43646, "cached_input_tokens": 41984, "cache_write_input_tokens": 0, "output_tokens": 172, "reasoning_output_tokens": 50, "total_tokens": 43818 }, "turn_token_usage": { "input_tokens": 1260201, "cached_input_tokens": 1193216, "cache_write_input_tokens": 0, "output_tokens": 19299, "reasoning_output_tokens": 7842, "total_tokens": 1279500 }, "thread_token_usage": { "input_tokens": 1260201, "cached_input_tokens": 1193216, "cache_write_input_tokens": 0, "output_tokens": 19299, "reasoning_output_tokens": 7842, "total_tokens": 1279500 } } ## Step 56 · agent · 2026-09-19T00:21:09.494Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:21:10.267Z { "code": "const r = await tools.write_stdin({session_id:68425,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:21:40.275Z Script completed Wall time 30.0 seconds Output: epoch 1/25 loss=0.73949 epoch 5/25 loss=0.50849 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd5743ab887d18674d566a301461f", "usage": { "input_tokens": 43914, "cached_input_tokens": 43520, "cache_write_input_tokens": 0, "output_tokens": 57, "reasoning_output_tokens": 10, "total_tokens": 43971 }, "turn_token_usage": { "input_tokens": 1304115, "cached_input_tokens": 1236736, "cache_write_input_tokens": 0, "output_tokens": 19356, "reasoning_output_tokens": 7852, "total_tokens": 1323471 }, "thread_token_usage": { "input_tokens": 1304115, "cached_input_tokens": 1236736, "cache_write_input_tokens": 0, "output_tokens": 19356, "reasoning_output_tokens": 7852, "total_tokens": 1323471 } } ### exec · 2026-09-19T00:21:42.204Z { "code": "const r = await tools.write_stdin({session_id:68425,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:22:12.212Z Script completed Wall time 30.0 seconds Output: epoch 10/25 loss=0.37343 epoch 15/25 loss=0.29374 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd59476dc87d194aa2a8fae107c5e", "usage": { "input_tokens": 44018, "cached_input_tokens": 41856, "cache_write_input_tokens": 0, "output_tokens": 45, "reasoning_output_tokens": 0, "total_tokens": 44063 }, "turn_token_usage": { "input_tokens": 1348133, "cached_input_tokens": 1278592, "cache_write_input_tokens": 0, "output_tokens": 19401, "reasoning_output_tokens": 7852, "total_tokens": 1367534 }, "thread_token_usage": { "input_tokens": 1348133, "cached_input_tokens": 1278592, "cache_write_input_tokens": 0, "output_tokens": 19401, "reasoning_output_tokens": 7852, "total_tokens": 1367534 } } ### exec · 2026-09-19T00:22:14.144Z { "code": "const r = await tools.write_stdin({session_id:68425,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:22:44.153Z Script completed Wall time 30.0 seconds Output: epoch 20/25 loss=0.23669 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd5b4655487d18e495ce39e14a162", "usage": { "input_tokens": 44110, "cached_input_tokens": 43776, "cache_write_input_tokens": 0, "output_tokens": 45, "reasoning_output_tokens": 0, "total_tokens": 44155 }, "turn_token_usage": { "input_tokens": 1392243, "cached_input_tokens": 1322368, "cache_write_input_tokens": 0, "output_tokens": 19446, "reasoning_output_tokens": 7852, "total_tokens": 1411689 }, "thread_token_usage": { "input_tokens": 1392243, "cached_input_tokens": 1322368, "cache_write_input_tokens": 0, "output_tokens": 19446, "reasoning_output_tokens": 7852, "total_tokens": 1411689 } } ### exec · 2026-09-19T00:22:46.006Z { "code": "const r = await tools.write_stdin({session_id:68425,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:22:48.407Z Script completed Wall time 2.4 seconds Output: epoch 25/25 loss=0.20645 wrote /app/solution/validation_neural_seed37.parquet (845600 rows) ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd5d4538487d1ab6bd18f01e18e8b", "usage": { "input_tokens": 44190, "cached_input_tokens": 43904, "cache_write_input_tokens": 0, "output_tokens": 45, "reasoning_output_tokens": 0, "total_tokens": 44235 }, "turn_token_usage": { "input_tokens": 1436433, "cached_input_tokens": 1366272, "cache_write_input_tokens": 0, "output_tokens": 19491, "reasoning_output_tokens": 7852, "total_tokens": 1455924 }, "thread_token_usage": { "input_tokens": 1436433, "cached_input_tokens": 1366272, "cache_write_input_tokens": 0, "output_tokens": 19491, "reasoning_output_tokens": 7852, "total_tokens": 1455924 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-e61fa918-4f53-4f23-b515-4575693f65e3", "process_id": "68425", "command": [ "/bin/sh", "-lc", "cp /app/solution/model_validation.pt /app/solution/model_validation_seed20260919.pt && /opt/task-venv/bin/python /app/solution/build_ranker.py --stage validation --epochs 25 --seed 37 --output /app/solution/validation_neural_seed37.parquet" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "cp /app/solution/model_validation.pt /app/solution/model_validation_seed20260919.pt && /opt/task-venv/bin/python /app/solution/build_ranker.py --stage validation --epochs 25 --seed 37 --output /app/solution/validation_neural_seed37.parquet" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "/app/solution/build_ranker.py:182: UserWarning: Converting a tensor with requires_grad=True to a scalar may lead to unexpected behavior.\nConsider using tensor.detach() first. (Triggered internally at /pytorch/torch/csrc/autograd/generated/python_variable_methods.cpp:835.)\n total+=float(loss); steps+=1\nepoch 1/25 loss=0.73949\nepoch 5/25 loss=0.50849\nepoch 10/25 loss=0.37343\nepoch 15/25 loss=0.29374\nepoch 20/25 loss=0.23669\nepoch 25/25 loss=0.20645\nwrote /app/solution/validation_neural_seed37.parquet (845600 rows)\n", "stderr": "", "aggregated_output": "/app/solution/build_ranker.py:182: UserWarning: Converting a tensor with requires_grad=True to a scalar may lead to unexpected behavior.\nConsider using tensor.detach() first. (Triggered internally at /pytorch/torch/csrc/autograd/generated/python_variable_methods.cpp:835.)\n total+=float(loss); steps+=1\nepoch 1/25 loss=0.73949\nepoch 5/25 loss=0.50849\nepoch 10/25 loss=0.37343\nepoch 15/25 loss=0.29374\nepoch 20/25 loss=0.23669\nepoch 25/25 loss=0.20645\nwrote /app/solution/validation_neural_seed37.parquet (845600 rows)\n", "exit_code": 0, "duration": { "secs": 130, "nanos": 443844927 }, "formatted_output": "/app/solution/build_ranker.py:182: UserWarning: Converting a tensor with requires_grad=True to a scalar may lead to unexpected behavior.\nConsider using tensor.detach() first. (Triggered internally at /pytorch/torch/csrc/autograd/generated/python_variable_methods.cpp:835.)\n total+=float(loss); steps+=1\nepoch 1/25 loss=0.73949\nepoch 5/25 loss=0.50849\nepoch 10/25 loss=0.37343\nepoch 15/25 loss=0.29374\nepoch 20/25 loss=0.23669\nepoch 25/25 loss=0.20645\nwrote /app/solution/validation_neural_seed37.parquet (845600 rows)\n" } } ## Step 57 · agent · 2026-09-19T00:22:52.145Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:22:55.237Z { "code": "const r = await tools.exec_command({cmd:\"cp /app/solution/model_validation.pt /app/solution/model_validation_seed37.pt && /opt/task-venv/bin/python /task/evaluate_public.py /app/solution/validation_neural_seed37.parquet && /opt/task-venv/bin/python /app/solution/rerank_ensemble.py --stage validation --checkpoints /app/solution/model_validation_seed20260919.pt /app/solution/model_validation_seed37.pt --prefix /app/solution/validation_ens --alphas -0.08 -0.04 0 0.03 0.06 0.1 0.16\",\"workdir\":\"/app\",\"yield_time_ms\":30000,\"max_output_tokens\":20000}); text(r.output); if(r.session_id) text(`SESSION_ID=${r.session_id}`);\n" } ### Tool output · 2026-09-19T00:23:25.403Z Script completed Wall time 30.2 seconds Output: { "model": "/app/solution/validation_neural_seed37.parquet", "scores": { "quality_ndcg@10": 0.014589, "quality_users": 4263 } } SESSION_ID=71897 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd5d8b05487d1a5549c80955a9e45", "usage": { "input_tokens": 44289, "cached_input_tokens": 43776, "cache_write_input_tokens": 0, "output_tokens": 204, "reasoning_output_tokens": 15, "total_tokens": 44493 }, "turn_token_usage": { "input_tokens": 1480722, "cached_input_tokens": 1410048, "cache_write_input_tokens": 0, "output_tokens": 19695, "reasoning_output_tokens": 7867, "total_tokens": 1500417 }, "thread_token_usage": { "input_tokens": 1480722, "cached_input_tokens": 1410048, "cache_write_input_tokens": 0, "output_tokens": 19695, "reasoning_output_tokens": 7867, "total_tokens": 1500417 } } ## Step 58 · agent · 2026-09-19T00:23:26.926Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:23:27.568Z { "code": "const r = await tools.write_stdin({session_id:71897,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:23:42.329Z Script completed Wall time 14.8 seconds Output: /app/solution/validation_ens_a-0.08.parquet /app/solution/validation_ens_a-0.04.parquet /app/solution/validation_ens_a0.parquet /app/solution/validation_ens_a0.03.parquet /app/solution/validation_ens_a0.06.parquet /app/solution/validation_ens_a0.1.parquet /app/solution/validation_ens_a0.16.parquet ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd5fdb4e487d1b186ff1603ae779a", "usage": { "input_tokens": 44570, "cached_input_tokens": 11136, "cache_write_input_tokens": 0, "output_tokens": 57, "reasoning_output_tokens": 10, "total_tokens": 44627 }, "turn_token_usage": { "input_tokens": 1525292, "cached_input_tokens": 1421184, "cache_write_input_tokens": 0, "output_tokens": 19752, "reasoning_output_tokens": 7877, "total_tokens": 1545044 }, "thread_token_usage": { "input_tokens": 1525292, "cached_input_tokens": 1421184, "cache_write_input_tokens": 0, "output_tokens": 19752, "reasoning_output_tokens": 7877, "total_tokens": 1545044 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-c45488df-185d-43c3-bc72-08ecaeeb7f23", "process_id": "71897", "command": [ "/bin/sh", "-lc", "cp /app/solution/model_validation.pt /app/solution/model_validation_seed37.pt && /opt/task-venv/bin/python /task/evaluate_public.py /app/solution/validation_neural_seed37.parquet && /opt/task-venv/bin/python /app/solution/rerank_ensemble.py --stage validation --checkpoints /app/solution/model_validation_seed20260919.pt /app/solution/model_validation_seed37.pt --prefix /app/solution/validation_ens --alphas -0.08 -0.04 0 0.03 0.06 0.1 0.16" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "cp /app/solution/model_validation.pt /app/solution/model_validation_seed37.pt && /opt/task-venv/bin/python /task/evaluate_public.py /app/solution/validation_neural_seed37.parquet && /opt/task-venv/bin/python /app/solution/rerank_ensemble.py --stage validation --checkpoints /app/solution/model_validation_seed20260919.pt /app/solution/model_validation_seed37.pt --prefix /app/solution/validation_ens --alphas -0.08 -0.04 0 0.03 0.06 0.1 0.16" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "{\n \"model\": \"/app/solution/validation_neural_seed37.parquet\",\n \"scores\": {\n \"quality_ndcg@10\": 0.014589,\n \"quality_users\": 4263\n }\n}\n/app/solution/validation_ens_a-0.08.parquet\n/app/solution/validation_ens_a-0.04.parquet\n/app/solution/validation_ens_a0.parquet\n/app/solution/validation_ens_a0.03.parquet\n/app/solution/validation_ens_a0.06.parquet\n/app/solution/validation_ens_a0.1.parquet\n/app/solution/validation_ens_a0.16.parquet\n", "stderr": "", "aggregated_output": "{\n \"model\": \"/app/solution/validation_neural_seed37.parquet\",\n \"scores\": {\n \"quality_ndcg@10\": 0.014589,\n \"quality_users\": 4263\n }\n}\n/app/solution/validation_ens_a-0.08.parquet\n/app/solution/validation_ens_a-0.04.parquet\n/app/solution/validation_ens_a0.parquet\n/app/solution/validation_ens_a0.03.parquet\n/app/solution/validation_ens_a0.06.parquet\n/app/solution/validation_ens_a0.1.parquet\n/app/solution/validation_ens_a0.16.parquet\n", "exit_code": 0, "duration": { "secs": 46, "nanos": 925536698 }, "formatted_output": "{\n \"model\": \"/app/solution/validation_neural_seed37.parquet\",\n \"scores\": {\n \"quality_ndcg@10\": 0.014589,\n \"quality_users\": 4263\n }\n}\n/app/solution/validation_ens_a-0.08.parquet\n/app/solution/validation_ens_a-0.04.parquet\n/app/solution/validation_ens_a0.parquet\n/app/solution/validation_ens_a0.03.parquet\n/app/solution/validation_ens_a0.06.parquet\n/app/solution/validation_ens_a0.1.parquet\n/app/solution/validation_ens_a0.16.parquet\n" } } ## Step 59 · agent · 2026-09-19T00:23:43.572Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:23:45.323Z { "code": "const r = await tools.exec_command({cmd:\"for f in /app/solution/validation_ens_a*.parquet; do /opt/task-venv/bin/python /task/evaluate_public.py \\\"$f\\\" | tr '\\\\n' ' '; echo; done\",\"workdir\":\"/app\",\"yield_time_ms\":30000,\"max_output_tokens\":20000}); text(r.output); if(r.session_id) text(`SESSION_ID=${r.session_id}`);\n" } ### Tool output · 2026-09-19T00:24:08.796Z Script completed Wall time 23.5 seconds Output: { "model": "/app/solution/validation_ens_a-0.04.parquet", "scores": { "quality_ndcg@10": 0.017035, "quality_users": 4263 } } { "model": "/app/solution/validation_ens_a-0.08.parquet", "scores": { "quality_ndcg@10": 0.017278, "quality_users": 4263 } } { "model": "/app/solution/validation_ens_a0.03.parquet", "scores": { "quality_ndcg@10": 0.016819, "quality_users": 4263 } } { "model": "/app/solution/validation_ens_a0.06.parquet", "scores": { "quality_ndcg@10": 0.016541, "quality_users": 4263 } } { "model": "/app/solution/validation_ens_a0.1.parquet", "scores": { "quality_ndcg@10": 0.016465, "quality_users": 4263 } } { "model": "/app/solution/validation_ens_a0.16.parquet", "scores": { "quality_ndcg@10": 0.016465, "quality_users": 4263 } } { "model": "/app/solution/validation_ens_a0.parquet", "scores": { "quality_ndcg@10": 0.016745, "quality_users": 4263 } } ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd60e90a087d1baacb2f32961e73c", "usage": { "input_tokens": 44748, "cached_input_tokens": 44416, "cache_write_input_tokens": 0, "output_tokens": 119, "reasoning_output_tokens": 14, "total_tokens": 44867 }, "turn_token_usage": { "input_tokens": 1570040, "cached_input_tokens": 1465600, "cache_write_input_tokens": 0, "output_tokens": 19871, "reasoning_output_tokens": 7891, "total_tokens": 1589911 }, "thread_token_usage": { "input_tokens": 1570040, "cached_input_tokens": 1465600, "cache_write_input_tokens": 0, "output_tokens": 19871, "reasoning_output_tokens": 7891, "total_tokens": 1589911 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-1c0cae85-efbb-41f2-91f3-45dec49012dd", "process_id": "96442", "command": [ "/bin/sh", "-lc", "for f in /app/solution/validation_ens_a*.parquet; do /opt/task-venv/bin/python /task/evaluate_public.py \"$f\" | tr '\\n' ' '; echo; done" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "for f in /app/solution/validation_ens_a*.parquet; do /opt/task-venv/bin/python /task/evaluate_public.py \"$f\" | tr '\\n' ' '; echo; done" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "{ \"model\": \"/app/solution/validation_ens_a-0.04.parquet\", \"scores\": { \"quality_ndcg@10\": 0.017035, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens_a-0.08.parquet\", \"scores\": { \"quality_ndcg@10\": 0.017278, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens_a0.03.parquet\", \"scores\": { \"quality_ndcg@10\": 0.016819, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens_a0.06.parquet\", \"scores\": { \"quality_ndcg@10\": 0.016541, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens_a0.1.parquet\", \"scores\": { \"quality_ndcg@10\": 0.016465, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens_a0.16.parquet\", \"scores\": { \"quality_ndcg@10\": 0.016465, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens_a0.parquet\", \"scores\": { \"quality_ndcg@10\": 0.016745, \"quality_users\": 4263 } } \n", "stderr": "", "aggregated_output": "{ \"model\": \"/app/solution/validation_ens_a-0.04.parquet\", \"scores\": { \"quality_ndcg@10\": 0.017035, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens_a-0.08.parquet\", \"scores\": { \"quality_ndcg@10\": 0.017278, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens_a0.03.parquet\", \"scores\": { \"quality_ndcg@10\": 0.016819, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens_a0.06.parquet\", \"scores\": { \"quality_ndcg@10\": 0.016541, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens_a0.1.parquet\", \"scores\": { \"quality_ndcg@10\": 0.016465, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens_a0.16.parquet\", \"scores\": { \"quality_ndcg@10\": 0.016465, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens_a0.parquet\", \"scores\": { \"quality_ndcg@10\": 0.016745, \"quality_users\": 4263 } } \n", "exit_code": 0, "duration": { "secs": 23, "nanos": 305361177 }, "formatted_output": "{ \"model\": \"/app/solution/validation_ens_a-0.04.parquet\", \"scores\": { \"quality_ndcg@10\": 0.017035, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens_a-0.08.parquet\", \"scores\": { \"quality_ndcg@10\": 0.017278, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens_a0.03.parquet\", \"scores\": { \"quality_ndcg@10\": 0.016819, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens_a0.06.parquet\", \"scores\": { \"quality_ndcg@10\": 0.016541, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens_a0.1.parquet\", \"scores\": { \"quality_ndcg@10\": 0.016465, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens_a0.16.parquet\", \"scores\": { \"quality_ndcg@10\": 0.016465, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens_a0.parquet\", \"scores\": { \"quality_ndcg@10\": 0.016745, \"quality_users\": 4263 } } \n" } } ## Step 60 · agent · 2026-09-19T00:24:10.867Z ### Thinking unavailable — no text recorded The second seed scores 0.014589 alone; concatenating both towers raises this to 0.016745. A mild novelty prior helps further: subtracting catalog popularity reaches 0.017278. That prior remains serving-compatible by reserving one extra coordinate in each tower (constant on the user side, popularity on the item side), so the final score is still exactly one dot product. I’m narrowing that coefficient before refitting. ### exec · 2026-09-19T00:24:15.031Z { "code": "const r = await tools.exec_command({cmd:\"/opt/task-venv/bin/python /app/solution/rerank_ensemble.py --stage validation --checkpoints /app/solution/model_validation_seed20260919.pt /app/solution/model_validation_seed37.pt --prefix /app/solution/validation_ens2 --alphas -0.06 -0.08 -0.1 -0.12 -0.16 -0.22 -0.3\",\"workdir\":\"/app\",\"yield_time_ms\":30000,\"max_output_tokens\":10000}); text(r.output); if(r.session_id) text(`SESSION_ID=${r.session_id}`);\n" } ### Tool output · 2026-09-19T00:24:45.198Z Script completed Wall time 30.2 seconds Output: SESSION_ID=41228 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd628f53887d1868675a529340abb", "usage": { "input_tokens": 45247, "cached_input_tokens": 44544, "cache_write_input_tokens": 0, "output_tokens": 286, "reasoning_output_tokens": 43, "total_tokens": 45533 }, "turn_token_usage": { "input_tokens": 1615287, "cached_input_tokens": 1510144, "cache_write_input_tokens": 0, "output_tokens": 20157, "reasoning_output_tokens": 7934, "total_tokens": 1635444 }, "thread_token_usage": { "input_tokens": 1615287, "cached_input_tokens": 1510144, "cache_write_input_tokens": 0, "output_tokens": 20157, "reasoning_output_tokens": 7934, "total_tokens": 1635444 } } ### exec · 2026-09-19T00:24:46.970Z { "code": "const r = await tools.write_stdin({session_id:41228,chars:\"\",yield_time_ms:30000,max_output_tokens:10000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:24:58.921Z Script completed Wall time 11.9 seconds Output: /app/solution/validation_ens2_a-0.06.parquet /app/solution/validation_ens2_a-0.08.parquet /app/solution/validation_ens2_a-0.1.parquet /app/solution/validation_ens2_a-0.12.parquet /app/solution/validation_ens2_a-0.16.parquet /app/solution/validation_ens2_a-0.22.parquet /app/solution/validation_ens2_a-0.3.parquet ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd64d618087d1b0c55c65a19c6033", "usage": { "input_tokens": 45561, "cached_input_tokens": 45056, "cache_write_input_tokens": 0, "output_tokens": 45, "reasoning_output_tokens": 0, "total_tokens": 45606 }, "turn_token_usage": { "input_tokens": 1660848, "cached_input_tokens": 1555200, "cache_write_input_tokens": 0, "output_tokens": 20202, "reasoning_output_tokens": 7934, "total_tokens": 1681050 }, "thread_token_usage": { "input_tokens": 1660848, "cached_input_tokens": 1555200, "cache_write_input_tokens": 0, "output_tokens": 20202, "reasoning_output_tokens": 7934, "total_tokens": 1681050 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-214f89a4-bb48-403e-8894-0a8d43756fa3", "process_id": "41228", "command": [ "/bin/sh", "-lc", "/opt/task-venv/bin/python /app/solution/rerank_ensemble.py --stage validation --checkpoints /app/solution/model_validation_seed20260919.pt /app/solution/model_validation_seed37.pt --prefix /app/solution/validation_ens2 --alphas -0.06 -0.08 -0.1 -0.12 -0.16 -0.22 -0.3" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "/opt/task-venv/bin/python /app/solution/rerank_ensemble.py --stage validation --checkpoints /app/solution/model_validation_seed20260919.pt /app/solution/model_validation_seed37.pt --prefix /app/solution/validation_ens2 --alphas -0.06 -0.08 -0.1 -0.12 -0.16 -0.22 -0.3" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "/app/solution/validation_ens2_a-0.06.parquet\n/app/solution/validation_ens2_a-0.08.parquet\n/app/solution/validation_ens2_a-0.1.parquet\n/app/solution/validation_ens2_a-0.12.parquet\n/app/solution/validation_ens2_a-0.16.parquet\n/app/solution/validation_ens2_a-0.22.parquet\n/app/solution/validation_ens2_a-0.3.parquet\n", "stderr": "", "aggregated_output": "/app/solution/validation_ens2_a-0.06.parquet\n/app/solution/validation_ens2_a-0.08.parquet\n/app/solution/validation_ens2_a-0.1.parquet\n/app/solution/validation_ens2_a-0.12.parquet\n/app/solution/validation_ens2_a-0.16.parquet\n/app/solution/validation_ens2_a-0.22.parquet\n/app/solution/validation_ens2_a-0.3.parquet\n", "exit_code": 0, "duration": { "secs": 43, "nanos": 724632925 }, "formatted_output": "/app/solution/validation_ens2_a-0.06.parquet\n/app/solution/validation_ens2_a-0.08.parquet\n/app/solution/validation_ens2_a-0.1.parquet\n/app/solution/validation_ens2_a-0.12.parquet\n/app/solution/validation_ens2_a-0.16.parquet\n/app/solution/validation_ens2_a-0.22.parquet\n/app/solution/validation_ens2_a-0.3.parquet\n" } } ### exec · 2026-09-19T00:25:01.879Z { "code": "const r = await tools.exec_command({cmd:\"for f in /app/solution/validation_ens2_a*.parquet; do /opt/task-venv/bin/python /task/evaluate_public.py \\\"$f\\\" | tr '\\\\n' ' '; echo; done\",\"workdir\":\"/app\",\"yield_time_ms\":30000,\"max_output_tokens\":20000}); text(r.output); if(r.session_id) text(`SESSION_ID=${r.session_id}`);\n" } ### Tool output · 2026-09-19T00:25:25.480Z Script completed Wall time 23.6 seconds Output: { "model": "/app/solution/validation_ens2_a-0.06.parquet", "scores": { "quality_ndcg@10": 0.017081, "quality_users": 4263 } } { "model": "/app/solution/validation_ens2_a-0.08.parquet", "scores": { "quality_ndcg@10": 0.017278, "quality_users": 4263 } } { "model": "/app/solution/validation_ens2_a-0.1.parquet", "scores": { "quality_ndcg@10": 0.017165, "quality_users": 4263 } } { "model": "/app/solution/validation_ens2_a-0.12.parquet", "scores": { "quality_ndcg@10": 0.017198, "quality_users": 4263 } } { "model": "/app/solution/validation_ens2_a-0.16.parquet", "scores": { "quality_ndcg@10": 0.017709, "quality_users": 4263 } } { "model": "/app/solution/validation_ens2_a-0.22.parquet", "scores": { "quality_ndcg@10": 0.01787, "quality_users": 4263 } } { "model": "/app/solution/validation_ens2_a-0.3.parquet", "scores": { "quality_ndcg@10": 0.019161, "quality_users": 4263 } } ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd65b37fc87d1898a6a40043862a4", "usage": { "input_tokens": 45741, "cached_input_tokens": 45440, "cache_write_input_tokens": 0, "output_tokens": 104, "reasoning_output_tokens": 0, "total_tokens": 45845 }, "turn_token_usage": { "input_tokens": 1706589, "cached_input_tokens": 1600640, "cache_write_input_tokens": 0, "output_tokens": 20306, "reasoning_output_tokens": 7934, "total_tokens": 1726895 }, "thread_token_usage": { "input_tokens": 1706589, "cached_input_tokens": 1600640, "cache_write_input_tokens": 0, "output_tokens": 20306, "reasoning_output_tokens": 7934, "total_tokens": 1726895 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-1b7d748d-e140-4e0e-9727-4319e1556e29", "process_id": "80553", "command": [ "/bin/sh", "-lc", "for f in /app/solution/validation_ens2_a*.parquet; do /opt/task-venv/bin/python /task/evaluate_public.py \"$f\" | tr '\\n' ' '; echo; done" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "for f in /app/solution/validation_ens2_a*.parquet; do /opt/task-venv/bin/python /task/evaluate_public.py \"$f\" | tr '\\n' ' '; echo; done" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "{ \"model\": \"/app/solution/validation_ens2_a-0.06.parquet\", \"scores\": { \"quality_ndcg@10\": 0.017081, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens2_a-0.08.parquet\", \"scores\": { \"quality_ndcg@10\": 0.017278, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens2_a-0.1.parquet\", \"scores\": { \"quality_ndcg@10\": 0.017165, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens2_a-0.12.parquet\", \"scores\": { \"quality_ndcg@10\": 0.017198, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens2_a-0.16.parquet\", \"scores\": { \"quality_ndcg@10\": 0.017709, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens2_a-0.22.parquet\", \"scores\": { \"quality_ndcg@10\": 0.01787, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens2_a-0.3.parquet\", \"scores\": { \"quality_ndcg@10\": 0.019161, \"quality_users\": 4263 } } \n", "stderr": "", "aggregated_output": "{ \"model\": \"/app/solution/validation_ens2_a-0.06.parquet\", \"scores\": { \"quality_ndcg@10\": 0.017081, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens2_a-0.08.parquet\", \"scores\": { \"quality_ndcg@10\": 0.017278, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens2_a-0.1.parquet\", \"scores\": { \"quality_ndcg@10\": 0.017165, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens2_a-0.12.parquet\", \"scores\": { \"quality_ndcg@10\": 0.017198, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens2_a-0.16.parquet\", \"scores\": { \"quality_ndcg@10\": 0.017709, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens2_a-0.22.parquet\", \"scores\": { \"quality_ndcg@10\": 0.01787, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens2_a-0.3.parquet\", \"scores\": { \"quality_ndcg@10\": 0.019161, \"quality_users\": 4263 } } \n", "exit_code": 0, "duration": { "secs": 23, "nanos": 433511341 }, "formatted_output": "{ \"model\": \"/app/solution/validation_ens2_a-0.06.parquet\", \"scores\": { \"quality_ndcg@10\": 0.017081, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens2_a-0.08.parquet\", \"scores\": { \"quality_ndcg@10\": 0.017278, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens2_a-0.1.parquet\", \"scores\": { \"quality_ndcg@10\": 0.017165, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens2_a-0.12.parquet\", \"scores\": { \"quality_ndcg@10\": 0.017198, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens2_a-0.16.parquet\", \"scores\": { \"quality_ndcg@10\": 0.017709, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens2_a-0.22.parquet\", \"scores\": { \"quality_ndcg@10\": 0.01787, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens2_a-0.3.parquet\", \"scores\": { \"quality_ndcg@10\": 0.019161, \"quality_users\": 4263 } } \n" } } ## Step 61 · agent · 2026-09-19T00:25:27.344Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:25:29.761Z { "code": "const r = await tools.exec_command({cmd:\"/opt/task-venv/bin/python /app/solution/rerank_ensemble.py --stage validation --checkpoints /app/solution/model_validation_seed20260919.pt /app/solution/model_validation_seed37.pt --prefix /app/solution/validation_ens3 --alphas -0.35 -0.4 -0.5 -0.65 -0.8 -1.0\",\"workdir\":\"/app\",\"yield_time_ms\":30000,\"max_output_tokens\":10000}); text(r.output); if(r.session_id) text(`SESSION_ID=${r.session_id}`);\n" } ### Tool output · 2026-09-19T00:25:59.928Z Script completed Wall time 30.2 seconds Output: SESSION_ID=2686 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd675aac087d198a33321ac05aa05", "usage": { "input_tokens": 46239, "cached_input_tokens": 45568, "cache_write_input_tokens": 0, "output_tokens": 188, "reasoning_output_tokens": 45, "total_tokens": 46427 }, "turn_token_usage": { "input_tokens": 1752828, "cached_input_tokens": 1646208, "cache_write_input_tokens": 0, "output_tokens": 20494, "reasoning_output_tokens": 7979, "total_tokens": 1773322 }, "thread_token_usage": { "input_tokens": 1752828, "cached_input_tokens": 1646208, "cache_write_input_tokens": 0, "output_tokens": 20494, "reasoning_output_tokens": 7979, "total_tokens": 1773322 } } ### exec · 2026-09-19T00:26:01.628Z { "code": "const r = await tools.write_stdin({session_id:2686,chars:\"\",yield_time_ms:30000,max_output_tokens:10000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:26:11.999Z Script completed Wall time 10.4 seconds Output: /app/solution/validation_ens3_a-0.35.parquet /app/solution/validation_ens3_a-0.4.parquet /app/solution/validation_ens3_a-0.5.parquet /app/solution/validation_ens3_a-0.65.parquet /app/solution/validation_ens3_a-0.8.parquet /app/solution/validation_ens3_a-1.parquet ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd6981e4c87d198d1298d5b944d29", "usage": { "input_tokens": 46455, "cached_input_tokens": 46080, "cache_write_input_tokens": 0, "output_tokens": 45, "reasoning_output_tokens": 0, "total_tokens": 46500 }, "turn_token_usage": { "input_tokens": 1799283, "cached_input_tokens": 1692288, "cache_write_input_tokens": 0, "output_tokens": 20539, "reasoning_output_tokens": 7979, "total_tokens": 1819822 }, "thread_token_usage": { "input_tokens": 1799283, "cached_input_tokens": 1692288, "cache_write_input_tokens": 0, "output_tokens": 20539, "reasoning_output_tokens": 7979, "total_tokens": 1819822 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-670153e3-c5fc-42c4-a337-d6881adcdc00", "process_id": "2686", "command": [ "/bin/sh", "-lc", "/opt/task-venv/bin/python /app/solution/rerank_ensemble.py --stage validation --checkpoints /app/solution/model_validation_seed20260919.pt /app/solution/model_validation_seed37.pt --prefix /app/solution/validation_ens3 --alphas -0.35 -0.4 -0.5 -0.65 -0.8 -1.0" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "/opt/task-venv/bin/python /app/solution/rerank_ensemble.py --stage validation --checkpoints /app/solution/model_validation_seed20260919.pt /app/solution/model_validation_seed37.pt --prefix /app/solution/validation_ens3 --alphas -0.35 -0.4 -0.5 -0.65 -0.8 -1.0" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "/app/solution/validation_ens3_a-0.35.parquet\n/app/solution/validation_ens3_a-0.4.parquet\n/app/solution/validation_ens3_a-0.5.parquet\n/app/solution/validation_ens3_a-0.65.parquet\n/app/solution/validation_ens3_a-0.8.parquet\n/app/solution/validation_ens3_a-1.parquet\n", "stderr": "", "aggregated_output": "/app/solution/validation_ens3_a-0.35.parquet\n/app/solution/validation_ens3_a-0.4.parquet\n/app/solution/validation_ens3_a-0.5.parquet\n/app/solution/validation_ens3_a-0.65.parquet\n/app/solution/validation_ens3_a-0.8.parquet\n/app/solution/validation_ens3_a-1.parquet\n", "exit_code": 0, "duration": { "secs": 42, "nanos": 66192071 }, "formatted_output": "/app/solution/validation_ens3_a-0.35.parquet\n/app/solution/validation_ens3_a-0.4.parquet\n/app/solution/validation_ens3_a-0.5.parquet\n/app/solution/validation_ens3_a-0.65.parquet\n/app/solution/validation_ens3_a-0.8.parquet\n/app/solution/validation_ens3_a-1.parquet\n" } } ### exec · 2026-09-19T00:26:14.785Z { "code": "const r = await tools.exec_command({cmd:\"for f in /app/solution/validation_ens3_a*.parquet; do /opt/task-venv/bin/python /task/evaluate_public.py \\\"$f\\\" | tr '\\\\n' ' '; echo; done\",\"workdir\":\"/app\",\"yield_time_ms\":30000,\"max_output_tokens\":20000}); text(r.output); if(r.session_id) text(`SESSION_ID=${r.session_id}`);\n" } ### Tool output · 2026-09-19T00:26:35.252Z Script completed Wall time 20.5 seconds Output: { "model": "/app/solution/validation_ens3_a-0.35.parquet", "scores": { "quality_ndcg@10": 0.018635, "quality_users": 4263 } } { "model": "/app/solution/validation_ens3_a-0.4.parquet", "scores": { "quality_ndcg@10": 0.018495, "quality_users": 4263 } } { "model": "/app/solution/validation_ens3_a-0.5.parquet", "scores": { "quality_ndcg@10": 0.018438, "quality_users": 4263 } } { "model": "/app/solution/validation_ens3_a-0.65.parquet", "scores": { "quality_ndcg@10": 0.017468, "quality_users": 4263 } } { "model": "/app/solution/validation_ens3_a-0.8.parquet", "scores": { "quality_ndcg@10": 0.015768, "quality_users": 4263 } } { "model": "/app/solution/validation_ens3_a-1.parquet", "scores": { "quality_ndcg@10": 0.012584, "quality_users": 4263 } } ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd6a437f087d1859822d8112beb59", "usage": { "input_tokens": 46617, "cached_input_tokens": 46336, "cache_write_input_tokens": 0, "output_tokens": 104, "reasoning_output_tokens": 0, "total_tokens": 46721 }, "turn_token_usage": { "input_tokens": 1845900, "cached_input_tokens": 1738624, "cache_write_input_tokens": 0, "output_tokens": 20643, "reasoning_output_tokens": 7979, "total_tokens": 1866543 }, "thread_token_usage": { "input_tokens": 1845900, "cached_input_tokens": 1738624, "cache_write_input_tokens": 0, "output_tokens": 20643, "reasoning_output_tokens": 7979, "total_tokens": 1866543 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-978d8fc9-0738-48d6-aabc-e271bac32dfa", "process_id": "55693", "command": [ "/bin/sh", "-lc", "for f in /app/solution/validation_ens3_a*.parquet; do /opt/task-venv/bin/python /task/evaluate_public.py \"$f\" | tr '\\n' ' '; echo; done" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "for f in /app/solution/validation_ens3_a*.parquet; do /opt/task-venv/bin/python /task/evaluate_public.py \"$f\" | tr '\\n' ' '; echo; done" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "{ \"model\": \"/app/solution/validation_ens3_a-0.35.parquet\", \"scores\": { \"quality_ndcg@10\": 0.018635, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3_a-0.4.parquet\", \"scores\": { \"quality_ndcg@10\": 0.018495, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3_a-0.5.parquet\", \"scores\": { \"quality_ndcg@10\": 0.018438, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3_a-0.65.parquet\", \"scores\": { \"quality_ndcg@10\": 0.017468, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3_a-0.8.parquet\", \"scores\": { \"quality_ndcg@10\": 0.015768, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3_a-1.parquet\", \"scores\": { \"quality_ndcg@10\": 0.012584, \"quality_users\": 4263 } } \n", "stderr": "", "aggregated_output": "{ \"model\": \"/app/solution/validation_ens3_a-0.35.parquet\", \"scores\": { \"quality_ndcg@10\": 0.018635, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3_a-0.4.parquet\", \"scores\": { \"quality_ndcg@10\": 0.018495, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3_a-0.5.parquet\", \"scores\": { \"quality_ndcg@10\": 0.018438, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3_a-0.65.parquet\", \"scores\": { \"quality_ndcg@10\": 0.017468, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3_a-0.8.parquet\", \"scores\": { \"quality_ndcg@10\": 0.015768, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3_a-1.parquet\", \"scores\": { \"quality_ndcg@10\": 0.012584, \"quality_users\": 4263 } } \n", "exit_code": 0, "duration": { "secs": 20, "nanos": 299821450 }, "formatted_output": "{ \"model\": \"/app/solution/validation_ens3_a-0.35.parquet\", \"scores\": { \"quality_ndcg@10\": 0.018635, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3_a-0.4.parquet\", \"scores\": { \"quality_ndcg@10\": 0.018495, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3_a-0.5.parquet\", \"scores\": { \"quality_ndcg@10\": 0.018438, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3_a-0.65.parquet\", \"scores\": { \"quality_ndcg@10\": 0.017468, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3_a-0.8.parquet\", \"scores\": { \"quality_ndcg@10\": 0.015768, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3_a-1.parquet\", \"scores\": { \"quality_ndcg@10\": 0.012584, \"quality_users\": 4263 } } \n" } } ## Step 62 · agent · 2026-09-19T00:26:41.659Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:26:43.355Z { "code": "const r = await tools.exec_command({cmd:\"/opt/task-venv/bin/python /app/solution/build_ranker.py --stage final --epochs 25 --seed 20260919 --output /app/solution/submission_seed1.parquet\",\"workdir\":\"/app\",\"yield_time_ms\":30000,\"max_output_tokens\":20000}); text(r.output); if(r.session_id) text(`SESSION_ID=${r.session_id}`);\n" } ### Tool output · 2026-09-19T00:27:13.522Z Script completed Wall time 30.2 seconds Output: SESSION_ID=94117 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd6bb6b0c87d1bca22346b59d2345", "usage": { "input_tokens": 47060, "cached_input_tokens": 46464, "cache_write_input_tokens": 0, "output_tokens": 405, "reasoning_output_tokens": 303, "total_tokens": 47465 }, "turn_token_usage": { "input_tokens": 1892960, "cached_input_tokens": 1785088, "cache_write_input_tokens": 0, "output_tokens": 21048, "reasoning_output_tokens": 8282, "total_tokens": 1914008 }, "thread_token_usage": { "input_tokens": 1892960, "cached_input_tokens": 1785088, "cache_write_input_tokens": 0, "output_tokens": 21048, "reasoning_output_tokens": 8282, "total_tokens": 1914008 } } ## Step 63 · agent · 2026-09-19T00:27:14.739Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:27:15.422Z { "code": "const r = await tools.write_stdin({session_id:94117,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:27:45.431Z Script completed Wall time 30.0 seconds Output: /app/solution/build_ranker.py:182: UserWarning: Converting a tensor with requires_grad=True to a scalar may lead to unexpected behavior. Consider using tensor.detach() first. (Triggered internally at /pytorch/torch/csrc/autograd/generated/python_variable_methods.cpp:835.) total+=float(loss); steps+=1 epoch 1/25 loss=0.73417 epoch 5/25 loss=0.50099 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd6e1d15487d1afba4256f7bcdb36", "usage": { "input_tokens": 47493, "cached_input_tokens": 46848, "cache_write_input_tokens": 0, "output_tokens": 53, "reasoning_output_tokens": 6, "total_tokens": 47546 }, "turn_token_usage": { "input_tokens": 1940453, "cached_input_tokens": 1831936, "cache_write_input_tokens": 0, "output_tokens": 21101, "reasoning_output_tokens": 8288, "total_tokens": 1961554 }, "thread_token_usage": { "input_tokens": 1940453, "cached_input_tokens": 1831936, "cache_write_input_tokens": 0, "output_tokens": 21101, "reasoning_output_tokens": 8288, "total_tokens": 1961554 } } ### exec · 2026-09-19T00:27:47.165Z { "code": "const r = await tools.write_stdin({session_id:94117,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:28:17.173Z Script completed Wall time 30.0 seconds Output: epoch 10/25 loss=0.37558 epoch 15/25 loss=0.29053 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd701a1a887d18fbdf276fc4c758d", "usage": { "input_tokens": 47661, "cached_input_tokens": 47360, "cache_write_input_tokens": 0, "output_tokens": 45, "reasoning_output_tokens": 0, "total_tokens": 47706 }, "turn_token_usage": { "input_tokens": 1988114, "cached_input_tokens": 1879296, "cache_write_input_tokens": 0, "output_tokens": 21146, "reasoning_output_tokens": 8288, "total_tokens": 2009260 }, "thread_token_usage": { "input_tokens": 1988114, "cached_input_tokens": 1879296, "cache_write_input_tokens": 0, "output_tokens": 21146, "reasoning_output_tokens": 8288, "total_tokens": 2009260 } } ### exec · 2026-09-19T00:28:21.531Z { "code": "const r = await tools.write_stdin({session_id:94117,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:28:51.541Z Script completed Wall time 30.0 seconds Output: epoch 20/25 loss=0.24007 epoch 25/25 loss=0.21339 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd722592487d1a6226dfe3e31957e", "usage": { "input_tokens": 47753, "cached_input_tokens": 47488, "cache_write_input_tokens": 0, "output_tokens": 45, "reasoning_output_tokens": 0, "total_tokens": 47798 }, "turn_token_usage": { "input_tokens": 2035867, "cached_input_tokens": 1926784, "cache_write_input_tokens": 0, "output_tokens": 21191, "reasoning_output_tokens": 8288, "total_tokens": 2057058 }, "thread_token_usage": { "input_tokens": 2035867, "cached_input_tokens": 1926784, "cache_write_input_tokens": 0, "output_tokens": 21191, "reasoning_output_tokens": 8288, "total_tokens": 2057058 } } ### exec · 2026-09-19T00:28:54.468Z { "code": "const r = await tools.write_stdin({session_id:94117,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:28:54.829Z Script completed Wall time 0.4 seconds Output: wrote /app/solution/submission_seed1.parquet (845600 rows) ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd743baa487d1b1eef603020dd2f9", "usage": { "input_tokens": 47845, "cached_input_tokens": 14464, "cache_write_input_tokens": 0, "output_tokens": 45, "reasoning_output_tokens": 0, "total_tokens": 47890 }, "turn_token_usage": { "input_tokens": 2083712, "cached_input_tokens": 1941248, "cache_write_input_tokens": 0, "output_tokens": 21236, "reasoning_output_tokens": 8288, "total_tokens": 2104948 }, "thread_token_usage": { "input_tokens": 2083712, "cached_input_tokens": 1941248, "cache_write_input_tokens": 0, "output_tokens": 21236, "reasoning_output_tokens": 8288, "total_tokens": 2104948 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-8cf79d0c-57c6-46f4-bb3e-55f67a0ed31f", "process_id": "94117", "command": [ "/bin/sh", "-lc", "/opt/task-venv/bin/python /app/solution/build_ranker.py --stage final --epochs 25 --seed 20260919 --output /app/solution/submission_seed1.parquet" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "/opt/task-venv/bin/python /app/solution/build_ranker.py --stage final --epochs 25 --seed 20260919 --output /app/solution/submission_seed1.parquet" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "/app/solution/build_ranker.py:182: UserWarning: Converting a tensor with requires_grad=True to a scalar may lead to unexpected behavior.\nConsider using tensor.detach() first. (Triggered internally at /pytorch/torch/csrc/autograd/generated/python_variable_methods.cpp:835.)\n total+=float(loss); steps+=1\nepoch 1/25 loss=0.73417\nepoch 5/25 loss=0.50099\nepoch 10/25 loss=0.37558\nepoch 15/25 loss=0.29053\nepoch 20/25 loss=0.24007\nepoch 25/25 loss=0.21339\nwrote /app/solution/submission_seed1.parquet (845600 rows)\n", "stderr": "", "aggregated_output": "/app/solution/build_ranker.py:182: UserWarning: Converting a tensor with requires_grad=True to a scalar may lead to unexpected behavior.\nConsider using tensor.detach() first. (Triggered internally at /pytorch/torch/csrc/autograd/generated/python_variable_methods.cpp:835.)\n total+=float(loss); steps+=1\nepoch 1/25 loss=0.73417\nepoch 5/25 loss=0.50099\nepoch 10/25 loss=0.37558\nepoch 15/25 loss=0.29053\nepoch 20/25 loss=0.24007\nepoch 25/25 loss=0.21339\nwrote /app/solution/submission_seed1.parquet (845600 rows)\n", "exit_code": 0, "duration": { "secs": 131, "nanos": 307493669 }, "formatted_output": "/app/solution/build_ranker.py:182: UserWarning: Converting a tensor with requires_grad=True to a scalar may lead to unexpected behavior.\nConsider using tensor.detach() first. (Triggered internally at /pytorch/torch/csrc/autograd/generated/python_variable_methods.cpp:835.)\n total+=float(loss); steps+=1\nepoch 1/25 loss=0.73417\nepoch 5/25 loss=0.50099\nepoch 10/25 loss=0.37558\nepoch 15/25 loss=0.29053\nepoch 20/25 loss=0.24007\nepoch 25/25 loss=0.21339\nwrote /app/solution/submission_seed1.parquet (845600 rows)\n" } } ## Step 64 · agent · 2026-09-19T00:28:59.429Z ### Thinking unavailable — no text recorded The novelty coefficient peaks at −0.30 with public NDCG@10 = 0.019161, about 79% above the strongest non-neural history baseline. The first final model has now been refit on training plus validation history; I’m fitting the second seed, then I’ll emit and structurally validate the concatenated 129-dimensional MIPS vectors. ### exec · 2026-09-19T00:29:03.026Z { "code": "const r = await tools.exec_command({cmd:\"cp /app/solution/model_final.pt /app/solution/model_final_seed20260919.pt && /opt/task-venv/bin/python /app/solution/build_ranker.py --stage final --epochs 25 --seed 37 --output /app/solution/submission_seed2.parquet\",\"workdir\":\"/app\",\"yield_time_ms\":30000,\"max_output_tokens\":20000}); text(r.output); if(r.session_id) text(`SESSION_ID=${r.session_id}`);\n" } ### Tool output · 2026-09-19T00:29:33.192Z Script completed Wall time 30.2 seconds Output: SESSION_ID=73230 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd7474dc887d1b0b1787bd2c3eba2", "usage": { "input_tokens": 47930, "cached_input_tokens": 47616, "cache_write_input_tokens": 0, "output_tokens": 214, "reasoning_output_tokens": 11, "total_tokens": 48144 }, "turn_token_usage": { "input_tokens": 2131642, "cached_input_tokens": 1988864, "cache_write_input_tokens": 0, "output_tokens": 21450, "reasoning_output_tokens": 8299, "total_tokens": 2153092 }, "thread_token_usage": { "input_tokens": 2131642, "cached_input_tokens": 1988864, "cache_write_input_tokens": 0, "output_tokens": 21450, "reasoning_output_tokens": 8299, "total_tokens": 2153092 } } ### exec · 2026-09-19T00:29:37.117Z { "code": "const r = await tools.write_stdin({session_id:73230,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:30:07.127Z Script completed Wall time 30.0 seconds Output: /app/solution/build_ranker.py:182: UserWarning: Converting a tensor with requires_grad=True to a scalar may lead to unexpected behavior. Consider using tensor.detach() first. (Triggered internally at /pytorch/torch/csrc/autograd/generated/python_variable_methods.cpp:835.) total+=float(loss); steps+=1 epoch 1/25 loss=0.74310 epoch 5/25 loss=0.50368 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd76d5da487d1b24f1380b62c5b06", "usage": { "input_tokens": 48172, "cached_input_tokens": 47744, "cache_write_input_tokens": 0, "output_tokens": 45, "reasoning_output_tokens": 0, "total_tokens": 48217 }, "turn_token_usage": { "input_tokens": 2179814, "cached_input_tokens": 2036608, "cache_write_input_tokens": 0, "output_tokens": 21495, "reasoning_output_tokens": 8299, "total_tokens": 2201309 }, "thread_token_usage": { "input_tokens": 2179814, "cached_input_tokens": 2036608, "cache_write_input_tokens": 0, "output_tokens": 21495, "reasoning_output_tokens": 8299, "total_tokens": 2201309 } } ### exec · 2026-09-19T00:30:09.350Z { "code": "const r = await tools.write_stdin({session_id:73230,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:30:39.358Z Script completed Wall time 30.0 seconds Output: epoch 10/25 loss=0.38113 epoch 15/25 loss=0.28437 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd78f59a887d1b85c8c57fb33cbd0", "usage": { "input_tokens": 48332, "cached_input_tokens": 48000, "cache_write_input_tokens": 0, "output_tokens": 45, "reasoning_output_tokens": 0, "total_tokens": 48377 }, "turn_token_usage": { "input_tokens": 2228146, "cached_input_tokens": 2084608, "cache_write_input_tokens": 0, "output_tokens": 21540, "reasoning_output_tokens": 8299, "total_tokens": 2249686 }, "thread_token_usage": { "input_tokens": 2228146, "cached_input_tokens": 2084608, "cache_write_input_tokens": 0, "output_tokens": 21540, "reasoning_output_tokens": 8299, "total_tokens": 2249686 } } ### exec · 2026-09-19T00:30:43.964Z { "code": "const r = await tools.write_stdin({session_id:73230,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:31:13.974Z Script completed Wall time 30.0 seconds Output: epoch 20/25 loss=0.24033 epoch 25/25 loss=0.21580 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd7af86e087d1a9017cc250b2fd08", "usage": { "input_tokens": 48424, "cached_input_tokens": 48128, "cache_write_input_tokens": 0, "output_tokens": 45, "reasoning_output_tokens": 0, "total_tokens": 48469 }, "turn_token_usage": { "input_tokens": 2276570, "cached_input_tokens": 2132736, "cache_write_input_tokens": 0, "output_tokens": 21585, "reasoning_output_tokens": 8299, "total_tokens": 2298155 }, "thread_token_usage": { "input_tokens": 2276570, "cached_input_tokens": 2132736, "cache_write_input_tokens": 0, "output_tokens": 21585, "reasoning_output_tokens": 8299, "total_tokens": 2298155 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-6f0657af-d0aa-4721-8357-d69e89d6b900", "process_id": "73230", "command": [ "/bin/sh", "-lc", "cp /app/solution/model_final.pt /app/solution/model_final_seed20260919.pt && /opt/task-venv/bin/python /app/solution/build_ranker.py --stage final --epochs 25 --seed 37 --output /app/solution/submission_seed2.parquet" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "cp /app/solution/model_final.pt /app/solution/model_final_seed20260919.pt && /opt/task-venv/bin/python /app/solution/build_ranker.py --stage final --epochs 25 --seed 37 --output /app/solution/submission_seed2.parquet" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "/app/solution/build_ranker.py:182: UserWarning: Converting a tensor with requires_grad=True to a scalar may lead to unexpected behavior.\nConsider using tensor.detach() first. (Triggered internally at /pytorch/torch/csrc/autograd/generated/python_variable_methods.cpp:835.)\n total+=float(loss); steps+=1\nepoch 1/25 loss=0.74310\nepoch 5/25 loss=0.50368\nepoch 10/25 loss=0.38113\nepoch 15/25 loss=0.28437\nepoch 20/25 loss=0.24033\nepoch 25/25 loss=0.21580\nwrote /app/solution/submission_seed2.parquet (845600 rows)\n", "stderr": "", "aggregated_output": "/app/solution/build_ranker.py:182: UserWarning: Converting a tensor with requires_grad=True to a scalar may lead to unexpected behavior.\nConsider using tensor.detach() first. (Triggered internally at /pytorch/torch/csrc/autograd/generated/python_variable_methods.cpp:835.)\n total+=float(loss); steps+=1\nepoch 1/25 loss=0.74310\nepoch 5/25 loss=0.50368\nepoch 10/25 loss=0.38113\nepoch 15/25 loss=0.28437\nepoch 20/25 loss=0.24033\nepoch 25/25 loss=0.21580\nwrote /app/solution/submission_seed2.parquet (845600 rows)\n", "exit_code": 0, "duration": { "secs": 132, "nanos": 898479611 }, "formatted_output": "/app/solution/build_ranker.py:182: UserWarning: Converting a tensor with requires_grad=True to a scalar may lead to unexpected behavior.\nConsider using tensor.detach() first. (Triggered internally at /pytorch/torch/csrc/autograd/generated/python_variable_methods.cpp:835.)\n total+=float(loss); steps+=1\nepoch 1/25 loss=0.74310\nepoch 5/25 loss=0.50368\nepoch 10/25 loss=0.38113\nepoch 15/25 loss=0.28437\nepoch 20/25 loss=0.24033\nepoch 25/25 loss=0.21580\nwrote /app/solution/submission_seed2.parquet (845600 rows)\n" } } ### exec · 2026-09-19T00:31:16.718Z { "code": "const r = await tools.write_stdin({session_id:73230,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:31:16.843Z Script completed Wall time 0.0 seconds Output: wrote /app/solution/submission_seed2.parquet (845600 rows) ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd7d2228c87d180c4f88a853ae50a", "usage": { "input_tokens": 48516, "cached_input_tokens": 48256, "cache_write_input_tokens": 0, "output_tokens": 45, "reasoning_output_tokens": 0, "total_tokens": 48561 }, "turn_token_usage": { "input_tokens": 2325086, "cached_input_tokens": 2180992, "cache_write_input_tokens": 0, "output_tokens": 21630, "reasoning_output_tokens": 8299, "total_tokens": 2346716 }, "thread_token_usage": { "input_tokens": 2325086, "cached_input_tokens": 2180992, "cache_write_input_tokens": 0, "output_tokens": 21630, "reasoning_output_tokens": 8299, "total_tokens": 2346716 } } ## Step 65 · agent · 2026-09-19T00:31:21.952Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:31:24.292Z { "code": "const r = await tools.exec_command({cmd:\"cp /app/solution/model_final.pt /app/solution/model_final_seed37.pt && /opt/task-venv/bin/python /app/solution/rerank_ensemble.py --stage final --checkpoints /app/solution/model_final_seed20260919.pt /app/solution/model_final_seed37.pt --prefix /app/solution/submission_final --alphas -0.3\",\"workdir\":\"/app\",\"yield_time_ms\":30000,\"max_output_tokens\":10000}); text(r.output); if(r.session_id) text(`SESSION_ID=${r.session_id}`);\n" } ### Tool output · 2026-09-19T00:31:54.458Z Script completed Wall time 30.2 seconds Output: SESSION_ID=64184 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd7d5185087d18bb34f61f6846f8b", "usage": { "input_tokens": 48601, "cached_input_tokens": 48384, "cache_write_input_tokens": 0, "output_tokens": 152, "reasoning_output_tokens": 13, "total_tokens": 48753 }, "turn_token_usage": { "input_tokens": 2373687, "cached_input_tokens": 2229376, "cache_write_input_tokens": 0, "output_tokens": 21782, "reasoning_output_tokens": 8312, "total_tokens": 2395469 }, "thread_token_usage": { "input_tokens": 2373687, "cached_input_tokens": 2229376, "cache_write_input_tokens": 0, "output_tokens": 21782, "reasoning_output_tokens": 8312, "total_tokens": 2395469 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-d67cfa7f-23bb-46c8-bc9c-350857ca8d42", "process_id": "64184", "command": [ "/bin/sh", "-lc", "cp /app/solution/model_final.pt /app/solution/model_final_seed37.pt && /opt/task-venv/bin/python /app/solution/rerank_ensemble.py --stage final --checkpoints /app/solution/model_final_seed20260919.pt /app/solution/model_final_seed37.pt --prefix /app/solution/submission_final --alphas -0.3" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "cp /app/solution/model_final.pt /app/solution/model_final_seed37.pt && /opt/task-venv/bin/python /app/solution/rerank_ensemble.py --stage final --checkpoints /app/solution/model_final_seed20260919.pt /app/solution/model_final_seed37.pt --prefix /app/solution/submission_final --alphas -0.3" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "/app/solution/submission_final_a-0.3.parquet\n", "stderr": "", "aggregated_output": "/app/solution/submission_final_a-0.3.parquet\n", "exit_code": 0, "duration": { "secs": 32, "nanos": 658416211 }, "formatted_output": "/app/solution/submission_final_a-0.3.parquet\n" } } ### exec · 2026-09-19T00:31:57.497Z { "code": "const r = await tools.write_stdin({session_id:64184,chars:\"\",yield_time_ms:30000,max_output_tokens:10000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:31:57.620Z Script completed Wall time 0.0 seconds Output: /app/solution/submission_final_a-0.3.parquet ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd7fac32087d1a801316264244dca", "usage": { "input_tokens": 48781, "cached_input_tokens": 48384, "cache_write_input_tokens": 0, "output_tokens": 45, "reasoning_output_tokens": 0, "total_tokens": 48826 }, "turn_token_usage": { "input_tokens": 2422468, "cached_input_tokens": 2277760, "cache_write_input_tokens": 0, "output_tokens": 21827, "reasoning_output_tokens": 8312, "total_tokens": 2444295 }, "thread_token_usage": { "input_tokens": 2422468, "cached_input_tokens": 2277760, "cache_write_input_tokens": 0, "output_tokens": 21827, "reasoning_output_tokens": 8312, "total_tokens": 2444295 } } ## Step 66 · agent · 2026-09-19T00:32:03.923Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:32:22.482Z { "code": "const patch = \"*** Begin Patch\\n*** Update File: /app/solution/rerank_ensemble.py\\n@@\\n import build_ranker as br\\n+\\n+class ServingUserTower(torch.nn.Module):\\n+ \\\"\\\"\\\"Concatenate trained user towers plus a constant prior coordinate.\\\"\\\"\\\"\\n+ def __init__(self, models): super().__init__(); self.towers=torch.nn.ModuleList([m.user_tower for m in models])\\n+ def forward(self,h,w):\\n+ scale=len(self.towers)**-0.5\\n+ parts=[t(h,w)*scale for t in self.towers]\\n+ return torch.cat(parts+[torch.ones((*parts[0].shape[:-1],1))],dim=-1)\\n+\\n+class ServingItemTower(torch.nn.Module):\\n+ \\\"\\\"\\\"Concatenate item towers plus catalog novelty, preserving exact MIPS.\\\"\\\"\\\"\\n+ def __init__(self, models, prior, alpha):\\n+ super().__init__(); self.towers=torch.nn.ModuleList([m.item_tower for m in models])\\n+ self.register_buffer('prior',torch.as_tensor(prior,dtype=torch.float32)); self.alpha=alpha\\n+ def forward(self,item_ids):\\n+ scale=len(self.towers)**-0.5\\n+ return torch.cat([t(item_ids)*scale for t in self.towers]+[(self.alpha*self.prior[item_ids]).unsqueeze(-1)],dim=-1)\\n*** Add File: /app/solution/run_final.sh\\n+#!/bin/sh\\n+set -eu\\n+PY=/opt/task-venv/bin/python\\n+DIR=/app/solution\\n+$PY \\\"$DIR/build_ranker.py\\\" --stage final --epochs 25 --seed 20260919 --output \\\"$DIR/submission_seed1.parquet\\\"\\n+cp \\\"$DIR/model_final.pt\\\" \\\"$DIR/model_final_seed20260919.pt\\\"\\n+$PY \\\"$DIR/build_ranker.py\\\" --stage final --epochs 25 --seed 37 --output \\\"$DIR/submission_seed2.parquet\\\"\\n+cp \\\"$DIR/model_final.pt\\\" \\\"$DIR/model_final_seed37.pt\\\"\\n+$PY \\\"$DIR/rerank_ensemble.py\\\" --stage final \\\\\\n+ --checkpoints \\\"$DIR/model_final_seed20260919.pt\\\" \\\"$DIR/model_final_seed37.pt\\\" \\\\\\n+ --prefix \\\"$DIR/submission_final\\\" --alphas -0.3\\n+cp \\\"$DIR/submission_final_a-0.3.parquet\\\" \\\"$DIR/submission.parquet\\\"\\n*** Add File: /app/solution/README.md\\n+# Made for You two-tower ranker\\n+\\n+## Model\\n+\\n+`build_ranker.py` implements separate PyTorch `UserTower` and `ItemTower`\\n+networks. The user tower has no user-ID embedding: it pools up to 192 items\\n+from listen/like/preference history through a learned 64-dimensional embedding\\n+table in four weighted views (long-term, recent, high-completion/liked, and\\n+signed explicit preference), then applies a 256→128→64 MLP. The independent\\n+item tower applies a 64→128→64 residual MLP to an item embedding.\\n+\\n+Two seeds are concatenated in `rerank_ensemble.py`. Their vectors are scaled by\\n+`1/sqrt(2)`, and a final coordinate represents the tuned catalog-novelty prior:\\n+the user coordinate is 1 and the item coordinate is `-0.3 * prior(item)`. Thus\\n+the deployed 129-dimensional score is **exactly one user/item dot product**.\\n+Items are encoded offline; request-time work is one history-tower evaluation\\n+followed by MIPS within the platform eligibility boundary.\\n+\\n+## Training\\n+\\n+Training uses ragged interaction lists and sampled eligible negatives; it never\\n+constructs or decomposes a global user-item matrix. Four held-out historical\\n+positives per user are optimized against 20 unseen negatives with pairwise\\n+logistic loss and hard-negative emphasis. Organic 80%-complete listens and\\n+organic likes receive stronger sampling weight. The final fit includes both\\n+training and validation interactions, with test-cutoff preference state.\\n+\\n+Public validation graded NDCG@10: **0.019161** over 4,263 scored users. The\\n+strongest non-neural history baseline was 0.010710.\\n+\\n+## Reproduce final submission\\n+\\n+```sh\\n+sh /app/solution/run_final.sh\\n+```\\n+\\n+The command writes `/app/solution/submission.parquet` with 100 eligible tracks\\n+per target user.\\n*** End Patch\";\ntext(await tools.apply_patch(patch));\n" } ### Tool output · 2026-09-19T00:32:23.357Z Script completed Wall time 0.0 seconds Output: {} ### Harness context { "type": "codex_item_completed", "item": { "type": "FileChange", "id": "exec-17199846-4440-4df3-9e5f-e58c6152a259", "changes": { "/app/solution/README.md": { "type": "add", "content": "# Made for You two-tower ranker\n\n## Model\n\n`build_ranker.py` implements separate PyTorch `UserTower` and `ItemTower`\nnetworks. The user tower has no user-ID embedding: it pools up to 192 items\nfrom listen/like/preference history through a learned 64-dimensional embedding\ntable in four weighted views (long-term, recent, high-completion/liked, and\nsigned explicit preference), then applies a 256→128→64 MLP. The independent\nitem tower applies a 64→128→64 residual MLP to an item embedding.\n\nTwo seeds are concatenated in `rerank_ensemble.py`. Their vectors are scaled by\n`1/sqrt(2)`, and a final coordinate represents the tuned catalog-novelty prior:\nthe user coordinate is 1 and the item coordinate is `-0.3 * prior(item)`. Thus\nthe deployed 129-dimensional score is **exactly one user/item dot product**.\nItems are encoded offline; request-time work is one history-tower evaluation\nfollowed by MIPS within the platform eligibility boundary.\n\n## Training\n\nTraining uses ragged interaction lists and sampled eligible negatives; it never\nconstructs or decomposes a global user-item matrix. Four held-out historical\npositives per user are optimized against 20 unseen negatives with pairwise\nlogistic loss and hard-negative emphasis. Organic 80%-complete listens and\norganic likes receive stronger sampling weight. The final fit includes both\ntraining and validation interactions, with test-cutoff preference state.\n\nPublic validation graded NDCG@10: **0.019161** over 4,263 scored users. The\nstrongest non-neural history baseline was 0.010710.\n\n## Reproduce final submission\n\n```sh\nsh /app/solution/run_final.sh\n```\n\nThe command writes `/app/solution/submission.parquet` with 100 eligible tracks\nper target user.\n" }, "/app/solution/run_final.sh": { "type": "add", "content": "#!/bin/sh\nset -eu\nPY=/opt/task-venv/bin/python\nDIR=/app/solution\n$PY \"$DIR/build_ranker.py\" --stage final --epochs 25 --seed 20260919 --output \"$DIR/submission_seed1.parquet\"\ncp \"$DIR/model_final.pt\" \"$DIR/model_final_seed20260919.pt\"\n$PY \"$DIR/build_ranker.py\" --stage final --epochs 25 --seed 37 --output \"$DIR/submission_seed2.parquet\"\ncp \"$DIR/model_final.pt\" \"$DIR/model_final_seed37.pt\"\n$PY \"$DIR/rerank_ensemble.py\" --stage final \\\n --checkpoints \"$DIR/model_final_seed20260919.pt\" \"$DIR/model_final_seed37.pt\" \\\n --prefix \"$DIR/submission_final\" --alphas -0.3\ncp \"$DIR/submission_final_a-0.3.parquet\" \"$DIR/submission.parquet\"\n" }, "/app/solution/rerank_ensemble.py": { "type": "update", "unified_diff": "@@ -9,2 +9,19 @@\n \n+class ServingUserTower(torch.nn.Module):\n+ \"\"\"Concatenate trained user towers plus a constant prior coordinate.\"\"\"\n+ def __init__(self, models): super().__init__(); self.towers=torch.nn.ModuleList([m.user_tower for m in models])\n+ def forward(self,h,w):\n+ scale=len(self.towers)**-0.5\n+ parts=[t(h,w)*scale for t in self.towers]\n+ return torch.cat(parts+[torch.ones((*parts[0].shape[:-1],1))],dim=-1)\n+\n+class ServingItemTower(torch.nn.Module):\n+ \"\"\"Concatenate item towers plus catalog novelty, preserving exact MIPS.\"\"\"\n+ def __init__(self, models, prior, alpha):\n+ super().__init__(); self.towers=torch.nn.ModuleList([m.item_tower for m in models])\n+ self.register_buffer('prior',torch.as_tensor(prior,dtype=torch.float32)); self.alpha=alpha\n+ def forward(self,item_ids):\n+ scale=len(self.towers)**-0.5\n+ return torch.cat([t(item_ids)*scale for t in self.towers]+[(self.alpha*self.prior[item_ids]).unsqueeze(-1)],dim=-1)\n+\n @torch.inference_mode()\n", "move_path": null } }, "status": "completed", "stdout": "Success. Updated the following files:\nA /app/solution/run_final.sh\nA /app/solution/README.md\nM /app/solution/rerank_ensemble.py\n", "stderr": "" } } ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd7fde7ac87d199ed5fd29cc7a0fc", "usage": { "input_tokens": 48863, "cached_input_tokens": 48640, "cache_write_input_tokens": 0, "output_tokens": 1277, "reasoning_output_tokens": 237, "total_tokens": 50140 }, "turn_token_usage": { "input_tokens": 2471331, "cached_input_tokens": 2326400, "cache_write_input_tokens": 0, "output_tokens": 23104, "reasoning_output_tokens": 8549, "total_tokens": 2494435 }, "thread_token_usage": { "input_tokens": 2471331, "cached_input_tokens": 2326400, "cache_write_input_tokens": 0, "output_tokens": 23104, "reasoning_output_tokens": 8549, "total_tokens": 2494435 } } ## Step 67 · agent · 2026-09-19T00:32:25.709Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:32:32.540Z { "code": "const r = await tools.exec_command({cmd:\"cp /app/solution/submission_final_a-0.3.parquet /app/solution/submission.parquet && chmod +x /app/solution/run_final.sh && /opt/task-venv/bin/python - <<'PY'\\nfrom pathlib import Path\\nimport sys, numpy as np, pandas as pd\\nsys.path.insert(0,'/task')\\nfrom ranking_evaluation import validate_ranking\\nD=Path('/task/data'); S=Path('/app/solution/submission.parquet')\\ntargets=set(map(int,pd.read_parquet(D/'target_users.parquet').uid))\\nd=validate_ranking(pd.read_parquet(S),targets)\\nz=np.load(D/'test_eligible_candidates.npz'); u=z['uids'].astype(np.int64); items=z['item_ids'].astype(np.int64); packed=z['packed_eligible']; ur={int(x):i for i,x in enumerate(u)}; ic={int(x):i for i,x in enumerate(items)}\\nbad=[]\\nfor uid,it in d[['uid','item_id']].itertuples(index=False,name=None):\\n r=ur[int(uid)]; c=ic.get(int(it),-1)\\n if c<0 or not ((int(packed[r,c//8])>>(c%8))&1): bad.append((uid,it))\\nprint({'rows':len(d),'users':d.uid.nunique(),'bad_eligibility':len(bad),'size_bytes':S.stat().st_size})\\nprint(d.head(12).to_string(index=False))\\nPY\\nls -lh /app/solution | tail -30\",\"workdir\":\"/app\",\"yield_time_ms\":30000,\"max_output_tokens\":20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:32:35.337Z Script completed Wall time 2.8 seconds Output: {'rows': 845600, 'users': 8456, 'bad_eligibility': 0, 'size_bytes': 1673694} uid item_id rank 100 8250570 1 100 3972057 2 100 507759 3 100 7958357 4 100 5488609 5 100 6511826 6 100 4488025 7 100 3285773 8 100 9164132 9 100 8256194 10 100 3368412 11 100 8460142 12 -rw-r--r-- 1 agent agent 1.6M Sep 19 00:28 submission_seed1.parquet -rw-r--r-- 1 agent agent 1.6M Sep 19 00:31 submission_seed2.parquet -rw-r--r-- 1 agent agent 712K Sep 19 00:11 validation_count.parquet -rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.06.parquet -rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.08.parquet -rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.1.parquet -rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.12.parquet -rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.16.parquet -rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.22.parquet -rw-r--r-- 1 agent agent 1.7M Sep 19 00:24 validation_ens2_a-0.3.parquet -rw-r--r-- 1 agent agent 1.7M Sep 19 00:26 validation_ens3_a-0.35.parquet -rw-r--r-- 1 agent agent 1.8M Sep 19 00:26 validation_ens3_a-0.4.parquet -rw-r--r-- 1 agent agent 1.8M Sep 19 00:26 validation_ens3_a-0.5.parquet -rw-r--r-- 1 agent agent 1.8M Sep 19 00:26 validation_ens3_a-0.65.parquet -rw-r--r-- 1 agent agent 1.8M Sep 19 00:26 validation_ens3_a-0.8.parquet -rw-r--r-- 1 agent agent 1.7M Sep 19 00:26 validation_ens3_a-1.parquet -rw-r--r-- 1 agent agent 1.6M Sep 19 00:23 validation_ens_a-0.04.parquet -rw-r--r-- 1 agent agent 1.6M Sep 19 00:23 validation_ens_a-0.08.parquet -rw-r--r-- 1 agent agent 1.6M Sep 19 00:23 validation_ens_a0.03.parquet -rw-r--r-- 1 agent agent 1.6M Sep 19 00:23 validation_ens_a0.06.parquet -rw-r--r-- 1 agent agent 1.6M Sep 19 00:23 validation_ens_a0.1.parquet -rw-r--r-- 1 agent agent 1.6M Sep 19 00:23 validation_ens_a0.16.parquet -rw-r--r-- 1 agent agent 1.6M Sep 19 00:23 validation_ens_a0.parquet -rw-r--r-- 1 agent agent 1.5M Sep 19 00:17 validation_neural.parquet -rw-r--r-- 1 agent agent 1.6M Sep 19 00:20 validation_neural_likes.parquet -rw-r--r-- 1 agent agent 1.6M Sep 19 00:22 validation_neural_seed37.parquet -rw-r--r-- 1 agent agent 712K Sep 19 00:12 validation_org.parquet -rw-r--r-- 1 agent agent 674K Sep 19 00:11 validation_pop.parquet -rw-r--r-- 1 agent agent 712K Sep 19 00:12 validation_recent.parquet -rw-r--r-- 1 agent agent 712K Sep 19 00:12 validation_recent2.parquet ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd817a59087d1ba84023075f32d02", "usage": { "input_tokens": 50164, "cached_input_tokens": 48640, "cache_write_input_tokens": 0, "output_tokens": 406, "reasoning_output_tokens": 16, "total_tokens": 50570 }, "turn_token_usage": { "input_tokens": 2521495, "cached_input_tokens": 2375040, "cache_write_input_tokens": 0, "output_tokens": 23510, "reasoning_output_tokens": 8565, "total_tokens": 2545005 }, "thread_token_usage": { "input_tokens": 2521495, "cached_input_tokens": 2375040, "cache_write_input_tokens": 0, "output_tokens": 23510, "reasoning_output_tokens": 8565, "total_tokens": 2545005 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-ae7fa5b4-370e-4ef7-b7df-94fb1f565b29", "process_id": "25541", "command": [ "/bin/sh", "-lc", "cp /app/solution/submission_final_a-0.3.parquet /app/solution/submission.parquet && chmod +x /app/solution/run_final.sh && /opt/task-venv/bin/python - <<'PY'\nfrom pathlib import Path\nimport sys, numpy as np, pandas as pd\nsys.path.insert(0,'/task')\nfrom ranking_evaluation import validate_ranking\nD=Path('/task/data'); S=Path('/app/solution/submission.parquet')\ntargets=set(map(int,pd.read_parquet(D/'target_users.parquet').uid))\nd=validate_ranking(pd.read_parquet(S),targets)\nz=np.load(D/'test_eligible_candidates.npz'); u=z['uids'].astype(np.int64); items=z['item_ids'].astype(np.int64); packed=z['packed_eligible']; ur={int(x):i for i,x in enumerate(u)}; ic={int(x):i for i,x in enumerate(items)}\nbad=[]\nfor uid,it in d[['uid','item_id']].itertuples(index=False,name=None):\n r=ur[int(uid)]; c=ic.get(int(it),-1)\n if c<0 or not ((int(packed[r,c//8])>>(c%8))&1): bad.append((uid,it))\nprint({'rows':len(d),'users':d.uid.nunique(),'bad_eligibility':len(bad),'size_bytes':S.stat().st_size})\nprint(d.head(12).to_string(index=False))\nPY\nls -lh /app/solution | tail -30" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "cp /app/solution/submission_final_a-0.3.parquet /app/solution/submission.parquet && chmod +x /app/solution/run_final.sh && /opt/task-venv/bin/python - <<'PY'\nfrom pathlib import Path\nimport sys, numpy as np, pandas as pd\nsys.path.insert(0,'/task')\nfrom ranking_evaluation import validate_ranking\nD=Path('/task/data'); S=Path('/app/solution/submission.parquet')\ntargets=set(map(int,pd.read_parquet(D/'target_users.parquet').uid))\nd=validate_ranking(pd.read_parquet(S),targets)\nz=np.load(D/'test_eligible_candidates.npz'); u=z['uids'].astype(np.int64); items=z['item_ids'].astype(np.int64); packed=z['packed_eligible']; ur={int(x):i for i,x in enumerate(u)}; ic={int(x):i for i,x in enumerate(items)}\nbad=[]\nfor uid,it in d[['uid','item_id']].itertuples(index=False,name=None):\n r=ur[int(uid)]; c=ic.get(int(it),-1)\n if c<0 or not ((int(packed[r,c//8])>>(c%8))&1): bad.append((uid,it))\nprint({'rows':len(d),'users':d.uid.nunique(),'bad_eligibility':len(bad),'size_bytes':S.stat().st_size})\nprint(d.head(12).to_string(index=False))\nPY\nls -lh /app/solution | tail -30" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "{'rows': 845600, 'users': 8456, 'bad_eligibility': 0, 'size_bytes': 1673694}\n uid item_id rank\n 100 8250570 1\n 100 3972057 2\n 100 507759 3\n 100 7958357 4\n 100 5488609 5\n 100 6511826 6\n 100 4488025 7\n 100 3285773 8\n 100 9164132 9\n 100 8256194 10\n 100 3368412 11\n 100 8460142 12\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:28 submission_seed1.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:31 submission_seed2.parquet\n-rw-r--r-- 1 agent agent 712K Sep 19 00:11 validation_count.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.06.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.08.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.1.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.12.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.16.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.22.parquet\n-rw-r--r-- 1 agent agent 1.7M Sep 19 00:24 validation_ens2_a-0.3.parquet\n-rw-r--r-- 1 agent agent 1.7M Sep 19 00:26 validation_ens3_a-0.35.parquet\n-rw-r--r-- 1 agent agent 1.8M Sep 19 00:26 validation_ens3_a-0.4.parquet\n-rw-r--r-- 1 agent agent 1.8M Sep 19 00:26 validation_ens3_a-0.5.parquet\n-rw-r--r-- 1 agent agent 1.8M Sep 19 00:26 validation_ens3_a-0.65.parquet\n-rw-r--r-- 1 agent agent 1.8M Sep 19 00:26 validation_ens3_a-0.8.parquet\n-rw-r--r-- 1 agent agent 1.7M Sep 19 00:26 validation_ens3_a-1.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:23 validation_ens_a-0.04.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:23 validation_ens_a-0.08.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:23 validation_ens_a0.03.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:23 validation_ens_a0.06.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:23 validation_ens_a0.1.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:23 validation_ens_a0.16.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:23 validation_ens_a0.parquet\n-rw-r--r-- 1 agent agent 1.5M Sep 19 00:17 validation_neural.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:20 validation_neural_likes.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:22 validation_neural_seed37.parquet\n-rw-r--r-- 1 agent agent 712K Sep 19 00:12 validation_org.parquet\n-rw-r--r-- 1 agent agent 674K Sep 19 00:11 validation_pop.parquet\n-rw-r--r-- 1 agent agent 712K Sep 19 00:12 validation_recent.parquet\n-rw-r--r-- 1 agent agent 712K Sep 19 00:12 validation_recent2.parquet\n", "stderr": "", "aggregated_output": "{'rows': 845600, 'users': 8456, 'bad_eligibility': 0, 'size_bytes': 1673694}\n uid item_id rank\n 100 8250570 1\n 100 3972057 2\n 100 507759 3\n 100 7958357 4\n 100 5488609 5\n 100 6511826 6\n 100 4488025 7\n 100 3285773 8\n 100 9164132 9\n 100 8256194 10\n 100 3368412 11\n 100 8460142 12\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:28 submission_seed1.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:31 submission_seed2.parquet\n-rw-r--r-- 1 agent agent 712K Sep 19 00:11 validation_count.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.06.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.08.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.1.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.12.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.16.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.22.parquet\n-rw-r--r-- 1 agent agent 1.7M Sep 19 00:24 validation_ens2_a-0.3.parquet\n-rw-r--r-- 1 agent agent 1.7M Sep 19 00:26 validation_ens3_a-0.35.parquet\n-rw-r--r-- 1 agent agent 1.8M Sep 19 00:26 validation_ens3_a-0.4.parquet\n-rw-r--r-- 1 agent agent 1.8M Sep 19 00:26 validation_ens3_a-0.5.parquet\n-rw-r--r-- 1 agent agent 1.8M Sep 19 00:26 validation_ens3_a-0.65.parquet\n-rw-r--r-- 1 agent agent 1.8M Sep 19 00:26 validation_ens3_a-0.8.parquet\n-rw-r--r-- 1 agent agent 1.7M Sep 19 00:26 validation_ens3_a-1.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:23 validation_ens_a-0.04.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:23 validation_ens_a-0.08.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:23 validation_ens_a0.03.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:23 validation_ens_a0.06.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:23 validation_ens_a0.1.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:23 validation_ens_a0.16.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:23 validation_ens_a0.parquet\n-rw-r--r-- 1 agent agent 1.5M Sep 19 00:17 validation_neural.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:20 validation_neural_likes.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:22 validation_neural_seed37.parquet\n-rw-r--r-- 1 agent agent 712K Sep 19 00:12 validation_org.parquet\n-rw-r--r-- 1 agent agent 674K Sep 19 00:11 validation_pop.parquet\n-rw-r--r-- 1 agent agent 712K Sep 19 00:12 validation_recent.parquet\n-rw-r--r-- 1 agent agent 712K Sep 19 00:12 validation_recent2.parquet\n", "exit_code": 0, "duration": { "secs": 2, "nanos": 627675190 }, "formatted_output": "{'rows': 845600, 'users': 8456, 'bad_eligibility': 0, 'size_bytes': 1673694}\n uid item_id rank\n 100 8250570 1\n 100 3972057 2\n 100 507759 3\n 100 7958357 4\n 100 5488609 5\n 100 6511826 6\n 100 4488025 7\n 100 3285773 8\n 100 9164132 9\n 100 8256194 10\n 100 3368412 11\n 100 8460142 12\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:28 submission_seed1.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:31 submission_seed2.parquet\n-rw-r--r-- 1 agent agent 712K Sep 19 00:11 validation_count.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.06.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.08.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.1.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.12.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.16.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.22.parquet\n-rw-r--r-- 1 agent agent 1.7M Sep 19 00:24 validation_ens2_a-0.3.parquet\n-rw-r--r-- 1 agent agent 1.7M Sep 19 00:26 validation_ens3_a-0.35.parquet\n-rw-r--r-- 1 agent agent 1.8M Sep 19 00:26 validation_ens3_a-0.4.parquet\n-rw-r--r-- 1 agent agent 1.8M Sep 19 00:26 validation_ens3_a-0.5.parquet\n-rw-r--r-- 1 agent agent 1.8M Sep 19 00:26 validation_ens3_a-0.65.parquet\n-rw-r--r-- 1 agent agent 1.8M Sep 19 00:26 validation_ens3_a-0.8.parquet\n-rw-r--r-- 1 agent agent 1.7M Sep 19 00:26 validation_ens3_a-1.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:23 validation_ens_a-0.04.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:23 validation_ens_a-0.08.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:23 validation_ens_a0.03.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:23 validation_ens_a0.06.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:23 validation_ens_a0.1.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:23 validation_ens_a0.16.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:23 validation_ens_a0.parquet\n-rw-r--r-- 1 agent agent 1.5M Sep 19 00:17 validation_neural.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:20 validation_neural_likes.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:22 validation_neural_seed37.parquet\n-rw-r--r-- 1 agent agent 712K Sep 19 00:12 validation_org.parquet\n-rw-r--r-- 1 agent agent 674K Sep 19 00:11 validation_pop.parquet\n-rw-r--r-- 1 agent agent 712K Sep 19 00:12 validation_recent.parquet\n-rw-r--r-- 1 agent agent 712K Sep 19 00:12 validation_recent2.parquet\n" } } ## Step 68 · agent · 2026-09-19T00:32:37.634Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:32:39.396Z { "code": "const r = await tools.exec_command({cmd:\"du -sh /app/solution; ls -lh /app/solution | head -25; /opt/task-venv/bin/python -m py_compile /app/solution/build_ranker.py /app/solution/rerank_ensemble.py /app/solution/probe_baselines.py\",\"workdir\":\"/app\",\"yield_time_ms\":30000,\"max_output_tokens\":10000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:32:39.567Z Script completed Wall time 0.2 seconds Output: 182M /app/solution total 182M -rw-r--r-- 1 agent agent 1.7K Sep 19 00:32 README.md -rw-r--r-- 1 agent agent 12K Sep 19 00:17 build_ranker.py -rw-r--r-- 1 agent agent 46M Sep 19 00:07 history_agg.parquet -rw-r--r-- 1 agent agent 15M Sep 19 00:31 model_final.pt -rw-r--r-- 1 agent agent 15M Sep 19 00:29 model_final_seed20260919.pt -rw-r--r-- 1 agent agent 15M Sep 19 00:31 model_final_seed37.pt -rw-r--r-- 1 agent agent 15M Sep 19 00:22 model_validation.pt -rw-r--r-- 1 agent agent 15M Sep 19 00:20 model_validation_seed20260919.pt -rw-r--r-- 1 agent agent 15M Sep 19 00:22 model_validation_seed37.pt -rw-r--r-- 1 agent agent 5.3K Sep 19 00:11 probe_baselines.py -rw-r--r-- 1 agent agent 3.4K Sep 19 00:32 rerank_ensemble.py -rwxr-xr-x 1 agent agent 637 Sep 19 00:32 run_final.sh -rw-r--r-- 1 agent agent 1.6M Sep 19 00:32 submission.parquet -rw-r--r-- 1 agent agent 1.6M Sep 19 00:31 submission_final_a-0.3.parquet -rw-r--r-- 1 agent agent 1.6M Sep 19 00:28 submission_seed1.parquet -rw-r--r-- 1 agent agent 1.6M Sep 19 00:31 submission_seed2.parquet -rw-r--r-- 1 agent agent 712K Sep 19 00:11 validation_count.parquet -rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.06.parquet -rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.08.parquet -rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.1.parquet -rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.12.parquet -rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.16.parquet -rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.22.parquet -rw-r--r-- 1 agent agent 1.7M Sep 19 00:24 validation_ens2_a-0.3.parquet ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd8238a1087d19399172e824d78f3", "usage": { "input_tokens": 51697, "cached_input_tokens": 50048, "cache_write_input_tokens": 0, "output_tokens": 140, "reasoning_output_tokens": 34, "total_tokens": 51837 }, "turn_token_usage": { "input_tokens": 2573192, "cached_input_tokens": 2425088, "cache_write_input_tokens": 0, "output_tokens": 23650, "reasoning_output_tokens": 8599, "total_tokens": 2596842 }, "thread_token_usage": { "input_tokens": 2573192, "cached_input_tokens": 2425088, "cache_write_input_tokens": 0, "output_tokens": 23650, "reasoning_output_tokens": 8599, "total_tokens": 2596842 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-2f9754ea-b267-4308-a540-5db2cd5f7ca5", "process_id": "23553", "command": [ "/bin/sh", "-lc", "du -sh /app/solution; ls -lh /app/solution | head -25; /opt/task-venv/bin/python -m py_compile /app/solution/build_ranker.py /app/solution/rerank_ensemble.py /app/solution/probe_baselines.py" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "du -sh /app/solution; ls -lh /app/solution | head -25; /opt/task-venv/bin/python -m py_compile /app/solution/build_ranker.py /app/solution/rerank_ensemble.py /app/solution/probe_baselines.py" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "182M\t/app/solution\ntotal 182M\n-rw-r--r-- 1 agent agent 1.7K Sep 19 00:32 README.md\n-rw-r--r-- 1 agent agent 12K Sep 19 00:17 build_ranker.py\n-rw-r--r-- 1 agent agent 46M Sep 19 00:07 history_agg.parquet\n-rw-r--r-- 1 agent agent 15M Sep 19 00:31 model_final.pt\n-rw-r--r-- 1 agent agent 15M Sep 19 00:29 model_final_seed20260919.pt\n-rw-r--r-- 1 agent agent 15M Sep 19 00:31 model_final_seed37.pt\n-rw-r--r-- 1 agent agent 15M Sep 19 00:22 model_validation.pt\n-rw-r--r-- 1 agent agent 15M Sep 19 00:20 model_validation_seed20260919.pt\n-rw-r--r-- 1 agent agent 15M Sep 19 00:22 model_validation_seed37.pt\n-rw-r--r-- 1 agent agent 5.3K Sep 19 00:11 probe_baselines.py\n-rw-r--r-- 1 agent agent 3.4K Sep 19 00:32 rerank_ensemble.py\n-rwxr-xr-x 1 agent agent 637 Sep 19 00:32 run_final.sh\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:32 submission.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:31 submission_final_a-0.3.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:28 submission_seed1.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:31 submission_seed2.parquet\n-rw-r--r-- 1 agent agent 712K Sep 19 00:11 validation_count.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.06.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.08.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.1.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.12.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.16.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.22.parquet\n-rw-r--r-- 1 agent agent 1.7M Sep 19 00:24 validation_ens2_a-0.3.parquet\n", "stderr": "", "aggregated_output": "182M\t/app/solution\ntotal 182M\n-rw-r--r-- 1 agent agent 1.7K Sep 19 00:32 README.md\n-rw-r--r-- 1 agent agent 12K Sep 19 00:17 build_ranker.py\n-rw-r--r-- 1 agent agent 46M Sep 19 00:07 history_agg.parquet\n-rw-r--r-- 1 agent agent 15M Sep 19 00:31 model_final.pt\n-rw-r--r-- 1 agent agent 15M Sep 19 00:29 model_final_seed20260919.pt\n-rw-r--r-- 1 agent agent 15M Sep 19 00:31 model_final_seed37.pt\n-rw-r--r-- 1 agent agent 15M Sep 19 00:22 model_validation.pt\n-rw-r--r-- 1 agent agent 15M Sep 19 00:20 model_validation_seed20260919.pt\n-rw-r--r-- 1 agent agent 15M Sep 19 00:22 model_validation_seed37.pt\n-rw-r--r-- 1 agent agent 5.3K Sep 19 00:11 probe_baselines.py\n-rw-r--r-- 1 agent agent 3.4K Sep 19 00:32 rerank_ensemble.py\n-rwxr-xr-x 1 agent agent 637 Sep 19 00:32 run_final.sh\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:32 submission.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:31 submission_final_a-0.3.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:28 submission_seed1.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:31 submission_seed2.parquet\n-rw-r--r-- 1 agent agent 712K Sep 19 00:11 validation_count.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.06.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.08.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.1.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.12.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.16.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.22.parquet\n-rw-r--r-- 1 agent agent 1.7M Sep 19 00:24 validation_ens2_a-0.3.parquet\n", "exit_code": 0, "duration": { "secs": 0, "nanos": 4560 }, "formatted_output": "182M\t/app/solution\ntotal 182M\n-rw-r--r-- 1 agent agent 1.7K Sep 19 00:32 README.md\n-rw-r--r-- 1 agent agent 12K Sep 19 00:17 build_ranker.py\n-rw-r--r-- 1 agent agent 46M Sep 19 00:07 history_agg.parquet\n-rw-r--r-- 1 agent agent 15M Sep 19 00:31 model_final.pt\n-rw-r--r-- 1 agent agent 15M Sep 19 00:29 model_final_seed20260919.pt\n-rw-r--r-- 1 agent agent 15M Sep 19 00:31 model_final_seed37.pt\n-rw-r--r-- 1 agent agent 15M Sep 19 00:22 model_validation.pt\n-rw-r--r-- 1 agent agent 15M Sep 19 00:20 model_validation_seed20260919.pt\n-rw-r--r-- 1 agent agent 15M Sep 19 00:22 model_validation_seed37.pt\n-rw-r--r-- 1 agent agent 5.3K Sep 19 00:11 probe_baselines.py\n-rw-r--r-- 1 agent agent 3.4K Sep 19 00:32 rerank_ensemble.py\n-rwxr-xr-x 1 agent agent 637 Sep 19 00:32 run_final.sh\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:32 submission.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:31 submission_final_a-0.3.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:28 submission_seed1.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:31 submission_seed2.parquet\n-rw-r--r-- 1 agent agent 712K Sep 19 00:11 validation_count.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.06.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.08.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.1.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.12.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.16.parquet\n-rw-r--r-- 1 agent agent 1.6M Sep 19 00:24 validation_ens2_a-0.22.parquet\n-rw-r--r-- 1 agent agent 1.7M Sep 19 00:24 validation_ens2_a-0.3.parquet\n" } } ## Step 69 · agent · 2026-09-19T00:32:53.502Z ### Thinking unavailable — no text recorded ## Step 70 · agent · 2026-09-19T00:32:53.646Z ### Thinking unavailable — no text recorded The final artifact passes the full structural contract: 845,600 rows, all 8,456 users, ranks 1–100, no duplicates, and zero eligibility violations. I have enough budget for one low-risk quality check: a third seed. I’ll retain the current validated two-seed submission unless the public metric improves enough to justify the extra 64 embedding dimensions. ### exec · 2026-09-19T00:32:56.245Z { "code": "const r = await tools.exec_command({cmd:\"/opt/task-venv/bin/python /app/solution/build_ranker.py --stage validation --epochs 25 --seed 999 --output /app/solution/validation_neural_seed999.parquet\",\"workdir\":\"/app\",\"yield_time_ms\":30000,\"max_output_tokens\":20000}); text(r.output); if(r.session_id) text(`SESSION_ID=${r.session_id}`);\n" } ### Tool output · 2026-09-19T00:33:26.412Z Script completed Wall time 30.2 seconds Output: /app/solution/build_ranker.py:182: UserWarning: Converting a tensor with requires_grad=True to a scalar may lead to unexpected behavior. Consider using tensor.detach() first. (Triggered internally at /pytorch/torch/csrc/autograd/generated/python_variable_methods.cpp:835.) total+=float(loss); steps+=1 SESSION_ID=31204 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd827c41487d1ad59f35f22e13617", "usage": { "input_tokens": 52568, "cached_input_tokens": 51456, "cache_write_input_tokens": 0, "output_tokens": 675, "reasoning_output_tokens": 490, "total_tokens": 53243 }, "turn_token_usage": { "input_tokens": 2625760, "cached_input_tokens": 2476544, "cache_write_input_tokens": 0, "output_tokens": 24325, "reasoning_output_tokens": 9089, "total_tokens": 2650085 }, "thread_token_usage": { "input_tokens": 2625760, "cached_input_tokens": 2476544, "cache_write_input_tokens": 0, "output_tokens": 24325, "reasoning_output_tokens": 9089, "total_tokens": 2650085 } } ### exec · 2026-09-19T00:33:30.412Z { "code": "const r = await tools.write_stdin({session_id:31204,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:34:00.424Z Script completed Wall time 30.0 seconds Output: epoch 1/25 loss=0.74113 epoch 5/25 loss=0.49801 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd856968087d19eadb2996b8fec5b", "usage": { "input_tokens": 53339, "cached_input_tokens": 52352, "cache_write_input_tokens": 0, "output_tokens": 45, "reasoning_output_tokens": 0, "total_tokens": 53384 }, "turn_token_usage": { "input_tokens": 2679099, "cached_input_tokens": 2528896, "cache_write_input_tokens": 0, "output_tokens": 24370, "reasoning_output_tokens": 9089, "total_tokens": 2703469 }, "thread_token_usage": { "input_tokens": 2679099, "cached_input_tokens": 2528896, "cache_write_input_tokens": 0, "output_tokens": 24370, "reasoning_output_tokens": 9089, "total_tokens": 2703469 } } ### exec · 2026-09-19T00:34:02.600Z { "code": "const r = await tools.write_stdin({session_id:31204,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:34:32.607Z Script completed Wall time 30.0 seconds Output: epoch 10/25 loss=0.36586 epoch 15/25 loss=0.28232 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd878926887d1b05807f2f14ba70d", "usage": { "input_tokens": 53431, "cached_input_tokens": 53120, "cache_write_input_tokens": 0, "output_tokens": 45, "reasoning_output_tokens": 0, "total_tokens": 53476 }, "turn_token_usage": { "input_tokens": 2732530, "cached_input_tokens": 2582016, "cache_write_input_tokens": 0, "output_tokens": 24415, "reasoning_output_tokens": 9089, "total_tokens": 2756945 }, "thread_token_usage": { "input_tokens": 2732530, "cached_input_tokens": 2582016, "cache_write_input_tokens": 0, "output_tokens": 24415, "reasoning_output_tokens": 9089, "total_tokens": 2756945 } } ### exec · 2026-09-19T00:34:36.178Z { "code": "const r = await tools.write_stdin({session_id:31204,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:35:06.186Z Script completed Wall time 30.0 seconds Output: epoch 20/25 loss=0.24034 epoch 25/25 loss=0.21789 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd898c51487d1a769a600f05ea257", "usage": { "input_tokens": 53523, "cached_input_tokens": 53248, "cache_write_input_tokens": 0, "output_tokens": 45, "reasoning_output_tokens": 0, "total_tokens": 53568 }, "turn_token_usage": { "input_tokens": 2786053, "cached_input_tokens": 2635264, "cache_write_input_tokens": 0, "output_tokens": 24460, "reasoning_output_tokens": 9089, "total_tokens": 2810513 }, "thread_token_usage": { "input_tokens": 2786053, "cached_input_tokens": 2635264, "cache_write_input_tokens": 0, "output_tokens": 24460, "reasoning_output_tokens": 9089, "total_tokens": 2810513 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-c60ae8ba-b904-4d0a-9b7a-7faf048e8145", "process_id": "31204", "command": [ "/bin/sh", "-lc", "/opt/task-venv/bin/python /app/solution/build_ranker.py --stage validation --epochs 25 --seed 999 --output /app/solution/validation_neural_seed999.parquet" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "/opt/task-venv/bin/python /app/solution/build_ranker.py --stage validation --epochs 25 --seed 999 --output /app/solution/validation_neural_seed999.parquet" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "/app/solution/build_ranker.py:182: UserWarning: Converting a tensor with requires_grad=True to a scalar may lead to unexpected behavior.\nConsider using tensor.detach() first. (Triggered internally at /pytorch/torch/csrc/autograd/generated/python_variable_methods.cpp:835.)\n total+=float(loss); steps+=1\nepoch 1/25 loss=0.74113\nepoch 5/25 loss=0.49801\nepoch 10/25 loss=0.36586\nepoch 15/25 loss=0.28232\nepoch 20/25 loss=0.24034\nepoch 25/25 loss=0.21789\nwrote /app/solution/validation_neural_seed999.parquet (845600 rows)\n", "stderr": "", "aggregated_output": "/app/solution/build_ranker.py:182: UserWarning: Converting a tensor with requires_grad=True to a scalar may lead to unexpected behavior.\nConsider using tensor.detach() first. (Triggered internally at /pytorch/torch/csrc/autograd/generated/python_variable_methods.cpp:835.)\n total+=float(loss); steps+=1\nepoch 1/25 loss=0.74113\nepoch 5/25 loss=0.49801\nepoch 10/25 loss=0.36586\nepoch 15/25 loss=0.28232\nepoch 20/25 loss=0.24034\nepoch 25/25 loss=0.21789\nwrote /app/solution/validation_neural_seed999.parquet (845600 rows)\n", "exit_code": 0, "duration": { "secs": 131, "nanos": 64627429 }, "formatted_output": "/app/solution/build_ranker.py:182: UserWarning: Converting a tensor with requires_grad=True to a scalar may lead to unexpected behavior.\nConsider using tensor.detach() first. (Triggered internally at /pytorch/torch/csrc/autograd/generated/python_variable_methods.cpp:835.)\n total+=float(loss); steps+=1\nepoch 1/25 loss=0.74113\nepoch 5/25 loss=0.49801\nepoch 10/25 loss=0.36586\nepoch 15/25 loss=0.28232\nepoch 20/25 loss=0.24034\nepoch 25/25 loss=0.21789\nwrote /app/solution/validation_neural_seed999.parquet (845600 rows)\n" } } ### exec · 2026-09-19T00:35:08.807Z { "code": "const r = await tools.write_stdin({session_id:31204,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:35:08.925Z Script completed Wall time 0.0 seconds Output: wrote /app/solution/validation_neural_seed999.parquet (845600 rows) ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd8ba585487d183da76a00023358f", "usage": { "input_tokens": 53615, "cached_input_tokens": 53376, "cache_write_input_tokens": 0, "output_tokens": 45, "reasoning_output_tokens": 0, "total_tokens": 53660 }, "turn_token_usage": { "input_tokens": 2839668, "cached_input_tokens": 2688640, "cache_write_input_tokens": 0, "output_tokens": 24505, "reasoning_output_tokens": 9089, "total_tokens": 2864173 }, "thread_token_usage": { "input_tokens": 2839668, "cached_input_tokens": 2688640, "cache_write_input_tokens": 0, "output_tokens": 24505, "reasoning_output_tokens": 9089, "total_tokens": 2864173 } } ## Step 71 · agent · 2026-09-19T00:35:11.720Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:35:14.997Z { "code": "const r = await tools.exec_command({cmd:\"cp /app/solution/model_validation.pt /app/solution/model_validation_seed999.pt && /opt/task-venv/bin/python /task/evaluate_public.py /app/solution/validation_neural_seed999.parquet && /opt/task-venv/bin/python /app/solution/rerank_ensemble.py --stage validation --checkpoints /app/solution/model_validation_seed20260919.pt /app/solution/model_validation_seed37.pt /app/solution/model_validation_seed999.pt --prefix /app/solution/validation_ens3seed --alphas -0.2 -0.25 -0.3 -0.35 -0.4\",\"workdir\":\"/app\",\"yield_time_ms\":30000,\"max_output_tokens\":20000}); text(r.output); if(r.session_id) text(`SESSION_ID=${r.session_id}`);\n" } ### Tool output · 2026-09-19T00:35:45.181Z Script completed Wall time 30.2 seconds Output: { "model": "/app/solution/validation_neural_seed999.parquet", "scores": { "quality_ndcg@10": 0.014123, "quality_users": 4263 } } SESSION_ID=84364 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd8bd63d087d188a4cb1ce7547a49", "usage": { "input_tokens": 53702, "cached_input_tokens": 53376, "cache_write_input_tokens": 0, "output_tokens": 207, "reasoning_output_tokens": 13, "total_tokens": 53909 }, "turn_token_usage": { "input_tokens": 2893370, "cached_input_tokens": 2742016, "cache_write_input_tokens": 0, "output_tokens": 24712, "reasoning_output_tokens": 9102, "total_tokens": 2918082 }, "thread_token_usage": { "input_tokens": 2893370, "cached_input_tokens": 2742016, "cache_write_input_tokens": 0, "output_tokens": 24712, "reasoning_output_tokens": 9102, "total_tokens": 2918082 } } ## Step 72 · agent · 2026-09-19T00:35:46.506Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:35:47.578Z { "code": "const r = await tools.write_stdin({session_id:84364,chars:\"\",yield_time_ms:30000,max_output_tokens:10000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:35:58.414Z Script completed Wall time 10.8 seconds Output: /app/solution/validation_ens3seed_a-0.2.parquet /app/solution/validation_ens3seed_a-0.25.parquet /app/solution/validation_ens3seed_a-0.3.parquet /app/solution/validation_ens3seed_a-0.35.parquet /app/solution/validation_ens3seed_a-0.4.parquet ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd8e161d487d1af6b1ca857b9b9bd", "usage": { "input_tokens": 53986, "cached_input_tokens": 53504, "cache_write_input_tokens": 0, "output_tokens": 53, "reasoning_output_tokens": 6, "total_tokens": 54039 }, "turn_token_usage": { "input_tokens": 2947356, "cached_input_tokens": 2795520, "cache_write_input_tokens": 0, "output_tokens": 24765, "reasoning_output_tokens": 9108, "total_tokens": 2972121 }, "thread_token_usage": { "input_tokens": 2947356, "cached_input_tokens": 2795520, "cache_write_input_tokens": 0, "output_tokens": 24765, "reasoning_output_tokens": 9108, "total_tokens": 2972121 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-0e8c85fc-3c7e-4f37-9ca7-459de6543633", "process_id": "84364", "command": [ "/bin/sh", "-lc", "cp /app/solution/model_validation.pt /app/solution/model_validation_seed999.pt && /opt/task-venv/bin/python /task/evaluate_public.py /app/solution/validation_neural_seed999.parquet && /opt/task-venv/bin/python /app/solution/rerank_ensemble.py --stage validation --checkpoints /app/solution/model_validation_seed20260919.pt /app/solution/model_validation_seed37.pt /app/solution/model_validation_seed999.pt --prefix /app/solution/validation_ens3seed --alphas -0.2 -0.25 -0.3 -0.35 -0.4" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "cp /app/solution/model_validation.pt /app/solution/model_validation_seed999.pt && /opt/task-venv/bin/python /task/evaluate_public.py /app/solution/validation_neural_seed999.parquet && /opt/task-venv/bin/python /app/solution/rerank_ensemble.py --stage validation --checkpoints /app/solution/model_validation_seed20260919.pt /app/solution/model_validation_seed37.pt /app/solution/model_validation_seed999.pt --prefix /app/solution/validation_ens3seed --alphas -0.2 -0.25 -0.3 -0.35 -0.4" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "{\n \"model\": \"/app/solution/validation_neural_seed999.parquet\",\n \"scores\": {\n \"quality_ndcg@10\": 0.014123,\n \"quality_users\": 4263\n }\n}\n/app/solution/validation_ens3seed_a-0.2.parquet\n/app/solution/validation_ens3seed_a-0.25.parquet\n/app/solution/validation_ens3seed_a-0.3.parquet\n/app/solution/validation_ens3seed_a-0.35.parquet\n/app/solution/validation_ens3seed_a-0.4.parquet\n", "stderr": "", "aggregated_output": "{\n \"model\": \"/app/solution/validation_neural_seed999.parquet\",\n \"scores\": {\n \"quality_ndcg@10\": 0.014123,\n \"quality_users\": 4263\n }\n}\n/app/solution/validation_ens3seed_a-0.2.parquet\n/app/solution/validation_ens3seed_a-0.25.parquet\n/app/solution/validation_ens3seed_a-0.3.parquet\n/app/solution/validation_ens3seed_a-0.35.parquet\n/app/solution/validation_ens3seed_a-0.4.parquet\n", "exit_code": 0, "duration": { "secs": 43, "nanos": 221109408 }, "formatted_output": "{\n \"model\": \"/app/solution/validation_neural_seed999.parquet\",\n \"scores\": {\n \"quality_ndcg@10\": 0.014123,\n \"quality_users\": 4263\n }\n}\n/app/solution/validation_ens3seed_a-0.2.parquet\n/app/solution/validation_ens3seed_a-0.25.parquet\n/app/solution/validation_ens3seed_a-0.3.parquet\n/app/solution/validation_ens3seed_a-0.35.parquet\n/app/solution/validation_ens3seed_a-0.4.parquet\n" } } ### exec · 2026-09-19T00:36:01.697Z { "code": "const r = await tools.exec_command({cmd:\"for f in /app/solution/validation_ens3seed_a*.parquet; do /opt/task-venv/bin/python /task/evaluate_public.py \\\"$f\\\" | tr '\\\\n' ' '; echo; done\",\"workdir\":\"/app\",\"yield_time_ms\":30000,\"max_output_tokens\":15000}); text(r.output); if(r.session_id) text(`SESSION_ID=${r.session_id}`);\n" } ### Tool output · 2026-09-19T00:36:18.601Z Script completed Wall time 16.9 seconds Output: { "model": "/app/solution/validation_ens3seed_a-0.2.parquet", "scores": { "quality_ndcg@10": 0.019306, "quality_users": 4263 } } { "model": "/app/solution/validation_ens3seed_a-0.25.parquet", "scores": { "quality_ndcg@10": 0.019657, "quality_users": 4263 } } { "model": "/app/solution/validation_ens3seed_a-0.3.parquet", "scores": { "quality_ndcg@10": 0.019643, "quality_users": 4263 } } { "model": "/app/solution/validation_ens3seed_a-0.35.parquet", "scores": { "quality_ndcg@10": 0.019938, "quality_users": 4263 } } { "model": "/app/solution/validation_ens3seed_a-0.4.parquet", "scores": { "quality_ndcg@10": 0.020063, "quality_users": 4263 } } ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd8eea27487d188749540c6e7269c", "usage": { "input_tokens": 54147, "cached_input_tokens": 53760, "cache_write_input_tokens": 0, "output_tokens": 105, "reasoning_output_tokens": 0, "total_tokens": 54252 }, "turn_token_usage": { "input_tokens": 3001503, "cached_input_tokens": 2849280, "cache_write_input_tokens": 0, "output_tokens": 24870, "reasoning_output_tokens": 9108, "total_tokens": 3026373 }, "thread_token_usage": { "input_tokens": 3001503, "cached_input_tokens": 2849280, "cache_write_input_tokens": 0, "output_tokens": 24870, "reasoning_output_tokens": 9108, "total_tokens": 3026373 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-f0cc9b50-7d32-41ab-b2f2-e066f1a57f3d", "process_id": "13724", "command": [ "/bin/sh", "-lc", "for f in /app/solution/validation_ens3seed_a*.parquet; do /opt/task-venv/bin/python /task/evaluate_public.py \"$f\" | tr '\\n' ' '; echo; done" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "for f in /app/solution/validation_ens3seed_a*.parquet; do /opt/task-venv/bin/python /task/evaluate_public.py \"$f\" | tr '\\n' ' '; echo; done" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "{ \"model\": \"/app/solution/validation_ens3seed_a-0.2.parquet\", \"scores\": { \"quality_ndcg@10\": 0.019306, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3seed_a-0.25.parquet\", \"scores\": { \"quality_ndcg@10\": 0.019657, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3seed_a-0.3.parquet\", \"scores\": { \"quality_ndcg@10\": 0.019643, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3seed_a-0.35.parquet\", \"scores\": { \"quality_ndcg@10\": 0.019938, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3seed_a-0.4.parquet\", \"scores\": { \"quality_ndcg@10\": 0.020063, \"quality_users\": 4263 } } \n", "stderr": "", "aggregated_output": "{ \"model\": \"/app/solution/validation_ens3seed_a-0.2.parquet\", \"scores\": { \"quality_ndcg@10\": 0.019306, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3seed_a-0.25.parquet\", \"scores\": { \"quality_ndcg@10\": 0.019657, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3seed_a-0.3.parquet\", \"scores\": { \"quality_ndcg@10\": 0.019643, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3seed_a-0.35.parquet\", \"scores\": { \"quality_ndcg@10\": 0.019938, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3seed_a-0.4.parquet\", \"scores\": { \"quality_ndcg@10\": 0.020063, \"quality_users\": 4263 } } \n", "exit_code": 0, "duration": { "secs": 16, "nanos": 726474592 }, "formatted_output": "{ \"model\": \"/app/solution/validation_ens3seed_a-0.2.parquet\", \"scores\": { \"quality_ndcg@10\": 0.019306, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3seed_a-0.25.parquet\", \"scores\": { \"quality_ndcg@10\": 0.019657, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3seed_a-0.3.parquet\", \"scores\": { \"quality_ndcg@10\": 0.019643, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3seed_a-0.35.parquet\", \"scores\": { \"quality_ndcg@10\": 0.019938, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3seed_a-0.4.parquet\", \"scores\": { \"quality_ndcg@10\": 0.020063, \"quality_users\": 4263 } } \n" } } ## Step 73 · agent · 2026-09-19T00:36:21.094Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:36:24.720Z { "code": "const r = await tools.exec_command({cmd:\"/opt/task-venv/bin/python /app/solution/rerank_ensemble.py --stage validation --checkpoints /app/solution/model_validation_seed20260919.pt /app/solution/model_validation_seed37.pt /app/solution/model_validation_seed999.pt --prefix /app/solution/validation_ens3seed2 --alphas -0.4 -0.45 -0.5 -0.55 -0.6 -0.7\",\"workdir\":\"/app\",\"yield_time_ms\":30000,\"max_output_tokens\":10000}); text(r.output); if(r.session_id) text(`SESSION_ID=${r.session_id}`);\n" } ### Tool output · 2026-09-19T00:36:54.887Z Script completed Wall time 30.2 seconds Output: SESSION_ID=36924 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd902d41887d198bcbe22bf70ab50", "usage": { "input_tokens": 54545, "cached_input_tokens": 54016, "cache_write_input_tokens": 0, "output_tokens": 184, "reasoning_output_tokens": 30, "total_tokens": 54729 }, "turn_token_usage": { "input_tokens": 3056048, "cached_input_tokens": 2903296, "cache_write_input_tokens": 0, "output_tokens": 25054, "reasoning_output_tokens": 9138, "total_tokens": 3081102 }, "thread_token_usage": { "input_tokens": 3056048, "cached_input_tokens": 2903296, "cache_write_input_tokens": 0, "output_tokens": 25054, "reasoning_output_tokens": 9138, "total_tokens": 3081102 } } ### exec · 2026-09-19T00:36:56.646Z { "code": "const r = await tools.write_stdin({session_id:36924,chars:\"\",yield_time_ms:30000,max_output_tokens:10000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:37:06.984Z Script completed Wall time 10.3 seconds Output: /app/solution/validation_ens3seed2_a-0.4.parquet /app/solution/validation_ens3seed2_a-0.45.parquet /app/solution/validation_ens3seed2_a-0.5.parquet /app/solution/validation_ens3seed2_a-0.55.parquet /app/solution/validation_ens3seed2_a-0.6.parquet /app/solution/validation_ens3seed2_a-0.7.parquet ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd9270d5c87d1b9e3a6ae5ce51223", "usage": { "input_tokens": 54757, "cached_input_tokens": 54400, "cache_write_input_tokens": 0, "output_tokens": 45, "reasoning_output_tokens": 0, "total_tokens": 54802 }, "turn_token_usage": { "input_tokens": 3110805, "cached_input_tokens": 2957696, "cache_write_input_tokens": 0, "output_tokens": 25099, "reasoning_output_tokens": 9138, "total_tokens": 3135904 }, "thread_token_usage": { "input_tokens": 3110805, "cached_input_tokens": 2957696, "cache_write_input_tokens": 0, "output_tokens": 25099, "reasoning_output_tokens": 9138, "total_tokens": 3135904 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-10e6eac3-0d2f-49e5-a221-692630e03cd5", "process_id": "36924", "command": [ "/bin/sh", "-lc", "/opt/task-venv/bin/python /app/solution/rerank_ensemble.py --stage validation --checkpoints /app/solution/model_validation_seed20260919.pt /app/solution/model_validation_seed37.pt /app/solution/model_validation_seed999.pt --prefix /app/solution/validation_ens3seed2 --alphas -0.4 -0.45 -0.5 -0.55 -0.6 -0.7" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "/opt/task-venv/bin/python /app/solution/rerank_ensemble.py --stage validation --checkpoints /app/solution/model_validation_seed20260919.pt /app/solution/model_validation_seed37.pt /app/solution/model_validation_seed999.pt --prefix /app/solution/validation_ens3seed2 --alphas -0.4 -0.45 -0.5 -0.55 -0.6 -0.7" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "/app/solution/validation_ens3seed2_a-0.4.parquet\n/app/solution/validation_ens3seed2_a-0.45.parquet\n/app/solution/validation_ens3seed2_a-0.5.parquet\n/app/solution/validation_ens3seed2_a-0.55.parquet\n/app/solution/validation_ens3seed2_a-0.6.parquet\n/app/solution/validation_ens3seed2_a-0.7.parquet\n", "stderr": "", "aggregated_output": "/app/solution/validation_ens3seed2_a-0.4.parquet\n/app/solution/validation_ens3seed2_a-0.45.parquet\n/app/solution/validation_ens3seed2_a-0.5.parquet\n/app/solution/validation_ens3seed2_a-0.55.parquet\n/app/solution/validation_ens3seed2_a-0.6.parquet\n/app/solution/validation_ens3seed2_a-0.7.parquet\n", "exit_code": 0, "duration": { "secs": 42, "nanos": 96653858 }, "formatted_output": "/app/solution/validation_ens3seed2_a-0.4.parquet\n/app/solution/validation_ens3seed2_a-0.45.parquet\n/app/solution/validation_ens3seed2_a-0.5.parquet\n/app/solution/validation_ens3seed2_a-0.55.parquet\n/app/solution/validation_ens3seed2_a-0.6.parquet\n/app/solution/validation_ens3seed2_a-0.7.parquet\n" } } ### exec · 2026-09-19T00:37:11.358Z { "code": "const r = await tools.exec_command({cmd:\"for f in /app/solution/validation_ens3seed2_a*.parquet; do /opt/task-venv/bin/python /task/evaluate_public.py \\\"$f\\\" | tr '\\\\n' ' '; echo; done\",\"workdir\":\"/app\",\"yield_time_ms\":30000,\"max_output_tokens\":15000}); text(r.output); if(r.session_id) text(`SESSION_ID=${r.session_id}`);\n" } ### Tool output · 2026-09-19T00:37:31.870Z Script completed Wall time 20.5 seconds Output: { "model": "/app/solution/validation_ens3seed2_a-0.4.parquet", "scores": { "quality_ndcg@10": 0.020063, "quality_users": 4263 } } { "model": "/app/solution/validation_ens3seed2_a-0.45.parquet", "scores": { "quality_ndcg@10": 0.020905, "quality_users": 4263 } } { "model": "/app/solution/validation_ens3seed2_a-0.5.parquet", "scores": { "quality_ndcg@10": 0.020576, "quality_users": 4263 } } { "model": "/app/solution/validation_ens3seed2_a-0.55.parquet", "scores": { "quality_ndcg@10": 0.020418, "quality_users": 4263 } } { "model": "/app/solution/validation_ens3seed2_a-0.6.parquet", "scores": { "quality_ndcg@10": 0.020066, "quality_users": 4263 } } { "model": "/app/solution/validation_ens3seed2_a-0.7.parquet", "scores": { "quality_ndcg@10": 0.018947, "quality_users": 4263 } } ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd9332e1087d1b61c1ea86ce7b8ec", "usage": { "input_tokens": 54933, "cached_input_tokens": 54528, "cache_write_input_tokens": 0, "output_tokens": 106, "reasoning_output_tokens": 0, "total_tokens": 55039 }, "turn_token_usage": { "input_tokens": 3165738, "cached_input_tokens": 3012224, "cache_write_input_tokens": 0, "output_tokens": 25205, "reasoning_output_tokens": 9138, "total_tokens": 3190943 }, "thread_token_usage": { "input_tokens": 3165738, "cached_input_tokens": 3012224, "cache_write_input_tokens": 0, "output_tokens": 25205, "reasoning_output_tokens": 9138, "total_tokens": 3190943 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-1c52c967-3517-4b29-ab94-e3b5b4b15578", "process_id": "13521", "command": [ "/bin/sh", "-lc", "for f in /app/solution/validation_ens3seed2_a*.parquet; do /opt/task-venv/bin/python /task/evaluate_public.py \"$f\" | tr '\\n' ' '; echo; done" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "for f in /app/solution/validation_ens3seed2_a*.parquet; do /opt/task-venv/bin/python /task/evaluate_public.py \"$f\" | tr '\\n' ' '; echo; done" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "{ \"model\": \"/app/solution/validation_ens3seed2_a-0.4.parquet\", \"scores\": { \"quality_ndcg@10\": 0.020063, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3seed2_a-0.45.parquet\", \"scores\": { \"quality_ndcg@10\": 0.020905, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3seed2_a-0.5.parquet\", \"scores\": { \"quality_ndcg@10\": 0.020576, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3seed2_a-0.55.parquet\", \"scores\": { \"quality_ndcg@10\": 0.020418, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3seed2_a-0.6.parquet\", \"scores\": { \"quality_ndcg@10\": 0.020066, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3seed2_a-0.7.parquet\", \"scores\": { \"quality_ndcg@10\": 0.018947, \"quality_users\": 4263 } } \n", "stderr": "", "aggregated_output": "{ \"model\": \"/app/solution/validation_ens3seed2_a-0.4.parquet\", \"scores\": { \"quality_ndcg@10\": 0.020063, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3seed2_a-0.45.parquet\", \"scores\": { \"quality_ndcg@10\": 0.020905, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3seed2_a-0.5.parquet\", \"scores\": { \"quality_ndcg@10\": 0.020576, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3seed2_a-0.55.parquet\", \"scores\": { \"quality_ndcg@10\": 0.020418, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3seed2_a-0.6.parquet\", \"scores\": { \"quality_ndcg@10\": 0.020066, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3seed2_a-0.7.parquet\", \"scores\": { \"quality_ndcg@10\": 0.018947, \"quality_users\": 4263 } } \n", "exit_code": 0, "duration": { "secs": 20, "nanos": 344653522 }, "formatted_output": "{ \"model\": \"/app/solution/validation_ens3seed2_a-0.4.parquet\", \"scores\": { \"quality_ndcg@10\": 0.020063, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3seed2_a-0.45.parquet\", \"scores\": { \"quality_ndcg@10\": 0.020905, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3seed2_a-0.5.parquet\", \"scores\": { \"quality_ndcg@10\": 0.020576, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3seed2_a-0.55.parquet\", \"scores\": { \"quality_ndcg@10\": 0.020418, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3seed2_a-0.6.parquet\", \"scores\": { \"quality_ndcg@10\": 0.020066, \"quality_users\": 4263 } } \n{ \"model\": \"/app/solution/validation_ens3seed2_a-0.7.parquet\", \"scores\": { \"quality_ndcg@10\": 0.018947, \"quality_users\": 4263 } } \n" } } ## Step 74 · agent · 2026-09-19T00:37:34.523Z ### Thinking unavailable — no text recorded The third seed clears the bar for keeping it: the 193-dimensional concatenated model reaches 0.020905 at the refined novelty coefficient −0.45. That is a 9.1% relative gain over the saved two-seed version, so I’m refitting this seed on the full observed history and will replace the submission only after revalidation. ### exec · 2026-09-19T00:37:37.709Z { "code": "const r = await tools.exec_command({cmd:\"/opt/task-venv/bin/python /app/solution/build_ranker.py --stage final --epochs 25 --seed 999 --output /app/solution/submission_seed3.parquet\",\"workdir\":\"/app\",\"yield_time_ms\":30000,\"max_output_tokens\":20000}); text(r.output); if(r.session_id) text(`SESSION_ID=${r.session_id}`);\n" } ### Tool output · 2026-09-19T00:38:07.875Z Script completed Wall time 30.2 seconds Output: SESSION_ID=72404 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd94c0c1887d1be40671fb33e7cfb", "usage": { "input_tokens": 55392, "cached_input_tokens": 54784, "cache_write_input_tokens": 0, "output_tokens": 216, "reasoning_output_tokens": 36, "total_tokens": 55608 }, "turn_token_usage": { "input_tokens": 3221130, "cached_input_tokens": 3067008, "cache_write_input_tokens": 0, "output_tokens": 25421, "reasoning_output_tokens": 9174, "total_tokens": 3246551 }, "thread_token_usage": { "input_tokens": 3221130, "cached_input_tokens": 3067008, "cache_write_input_tokens": 0, "output_tokens": 25421, "reasoning_output_tokens": 9174, "total_tokens": 3246551 } } ### exec · 2026-09-19T00:38:10.213Z { "code": "const r = await tools.write_stdin({session_id:72404,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:38:40.222Z Script completed Wall time 30.0 seconds Output: /app/solution/build_ranker.py:182: UserWarning: Converting a tensor with requires_grad=True to a scalar may lead to unexpected behavior. Consider using tensor.detach() first. (Triggered internally at /pytorch/torch/csrc/autograd/generated/python_variable_methods.cpp:835.) total+=float(loss); steps+=1 epoch 1/25 loss=0.74234 epoch 5/25 loss=0.49941 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd9700c5087d19f9be8987b0f4d93", "usage": { "input_tokens": 55636, "cached_input_tokens": 55168, "cache_write_input_tokens": 0, "output_tokens": 45, "reasoning_output_tokens": 0, "total_tokens": 55681 }, "turn_token_usage": { "input_tokens": 3276766, "cached_input_tokens": 3122176, "cache_write_input_tokens": 0, "output_tokens": 25466, "reasoning_output_tokens": 9174, "total_tokens": 3302232 }, "thread_token_usage": { "input_tokens": 3276766, "cached_input_tokens": 3122176, "cache_write_input_tokens": 0, "output_tokens": 25466, "reasoning_output_tokens": 9174, "total_tokens": 3302232 } } ### exec · 2026-09-19T00:38:42.205Z { "code": "const r = await tools.write_stdin({session_id:72404,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:39:12.216Z Script completed Wall time 30.0 seconds Output: epoch 10/25 loss=0.37324 epoch 15/25 loss=0.27642 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd9906e9c87d1a16d1d2d76944979", "usage": { "input_tokens": 55796, "cached_input_tokens": 55424, "cache_write_input_tokens": 0, "output_tokens": 45, "reasoning_output_tokens": 0, "total_tokens": 55841 }, "turn_token_usage": { "input_tokens": 3332562, "cached_input_tokens": 3177600, "cache_write_input_tokens": 0, "output_tokens": 25511, "reasoning_output_tokens": 9174, "total_tokens": 3358073 }, "thread_token_usage": { "input_tokens": 3332562, "cached_input_tokens": 3177600, "cache_write_input_tokens": 0, "output_tokens": 25511, "reasoning_output_tokens": 9174, "total_tokens": 3358073 } } ### exec · 2026-09-19T00:39:16.386Z { "code": "const r = await tools.write_stdin({session_id:72404,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:39:46.395Z Script completed Wall time 30.0 seconds Output: epoch 20/25 loss=0.23865 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd9b0692487d1829598faeafcfadd", "usage": { "input_tokens": 55888, "cached_input_tokens": 55680, "cache_write_input_tokens": 0, "output_tokens": 45, "reasoning_output_tokens": 0, "total_tokens": 55933 }, "turn_token_usage": { "input_tokens": 3388450, "cached_input_tokens": 3233280, "cache_write_input_tokens": 0, "output_tokens": 25556, "reasoning_output_tokens": 9174, "total_tokens": 3414006 }, "thread_token_usage": { "input_tokens": 3388450, "cached_input_tokens": 3233280, "cache_write_input_tokens": 0, "output_tokens": 25556, "reasoning_output_tokens": 9174, "total_tokens": 3414006 } } ### exec · 2026-09-19T00:39:49.900Z { "code": "const r = await tools.write_stdin({session_id:72404,chars:\"\",yield_time_ms:30000,max_output_tokens:20000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:39:51.745Z Script completed Wall time 1.8 seconds Output: epoch 25/25 loss=0.21495 wrote /app/solution/submission_seed3.parquet (845600 rows) ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd9d2905087d1892f664279c305b5", "usage": { "input_tokens": 55968, "cached_input_tokens": 55680, "cache_write_input_tokens": 0, "output_tokens": 45, "reasoning_output_tokens": 0, "total_tokens": 56013 }, "turn_token_usage": { "input_tokens": 3444418, "cached_input_tokens": 3288960, "cache_write_input_tokens": 0, "output_tokens": 25601, "reasoning_output_tokens": 9174, "total_tokens": 3470019 }, "thread_token_usage": { "input_tokens": 3444418, "cached_input_tokens": 3288960, "cache_write_input_tokens": 0, "output_tokens": 25601, "reasoning_output_tokens": 9174, "total_tokens": 3470019 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-427cd7d5-0331-41f8-9ecd-7a552c2c2a21", "process_id": "72404", "command": [ "/bin/sh", "-lc", "/opt/task-venv/bin/python /app/solution/build_ranker.py --stage final --epochs 25 --seed 999 --output /app/solution/submission_seed3.parquet" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "/opt/task-venv/bin/python /app/solution/build_ranker.py --stage final --epochs 25 --seed 999 --output /app/solution/submission_seed3.parquet" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "/app/solution/build_ranker.py:182: UserWarning: Converting a tensor with requires_grad=True to a scalar may lead to unexpected behavior.\nConsider using tensor.detach() first. (Triggered internally at /pytorch/torch/csrc/autograd/generated/python_variable_methods.cpp:835.)\n total+=float(loss); steps+=1\nepoch 1/25 loss=0.74234\nepoch 5/25 loss=0.49941\nepoch 10/25 loss=0.37324\nepoch 15/25 loss=0.27642\nepoch 20/25 loss=0.23865\nepoch 25/25 loss=0.21495\nwrote /app/solution/submission_seed3.parquet (845600 rows)\n", "stderr": "", "aggregated_output": "/app/solution/build_ranker.py:182: UserWarning: Converting a tensor with requires_grad=True to a scalar may lead to unexpected behavior.\nConsider using tensor.detach() first. (Triggered internally at /pytorch/torch/csrc/autograd/generated/python_variable_methods.cpp:835.)\n total+=float(loss); steps+=1\nepoch 1/25 loss=0.74234\nepoch 5/25 loss=0.49941\nepoch 10/25 loss=0.37324\nepoch 15/25 loss=0.27642\nepoch 20/25 loss=0.23865\nepoch 25/25 loss=0.21495\nwrote /app/solution/submission_seed3.parquet (845600 rows)\n", "exit_code": 0, "duration": { "secs": 133, "nanos": 869674008 }, "formatted_output": "/app/solution/build_ranker.py:182: UserWarning: Converting a tensor with requires_grad=True to a scalar may lead to unexpected behavior.\nConsider using tensor.detach() first. (Triggered internally at /pytorch/torch/csrc/autograd/generated/python_variable_methods.cpp:835.)\n total+=float(loss); steps+=1\nepoch 1/25 loss=0.74234\nepoch 5/25 loss=0.49941\nepoch 10/25 loss=0.37324\nepoch 15/25 loss=0.27642\nepoch 20/25 loss=0.23865\nepoch 25/25 loss=0.21495\nwrote /app/solution/submission_seed3.parquet (845600 rows)\n" } } ## Step 75 · agent · 2026-09-19T00:39:53.494Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:39:56.011Z { "code": "const r = await tools.exec_command({cmd:\"cp /app/solution/model_final.pt /app/solution/model_final_seed999.pt && /opt/task-venv/bin/python /app/solution/rerank_ensemble.py --stage final --checkpoints /app/solution/model_final_seed20260919.pt /app/solution/model_final_seed37.pt /app/solution/model_final_seed999.pt --prefix /app/solution/submission_best --alphas -0.45\",\"workdir\":\"/app\",\"yield_time_ms\":30000,\"max_output_tokens\":10000}); text(r.output); if(r.session_id) text(`SESSION_ID=${r.session_id}`);\n" } ### Tool output · 2026-09-19T00:40:26.176Z Script completed Wall time 30.2 seconds Output: SESSION_ID=64570 ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd9d7ee0887d1b11f0a832266f094", "usage": { "input_tokens": 56065, "cached_input_tokens": 55808, "cache_write_input_tokens": 0, "output_tokens": 156, "reasoning_output_tokens": 8, "total_tokens": 56221 }, "turn_token_usage": { "input_tokens": 3500483, "cached_input_tokens": 3344768, "cache_write_input_tokens": 0, "output_tokens": 25757, "reasoning_output_tokens": 9182, "total_tokens": 3526240 }, "thread_token_usage": { "input_tokens": 3500483, "cached_input_tokens": 3344768, "cache_write_input_tokens": 0, "output_tokens": 25757, "reasoning_output_tokens": 9182, "total_tokens": 3526240 } } ### exec · 2026-09-19T00:40:28.280Z { "code": "const r = await tools.write_stdin({session_id:64570,chars:\"\",yield_time_ms:30000,max_output_tokens:10000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:40:29.452Z Script completed Wall time 1.2 seconds Output: /app/solution/submission_best_a-0.45.parquet ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd9fa843487d1bca4cb1df648d5dc", "usage": { "input_tokens": 56249, "cached_input_tokens": 55936, "cache_write_input_tokens": 0, "output_tokens": 45, "reasoning_output_tokens": 0, "total_tokens": 56294 }, "turn_token_usage": { "input_tokens": 3556732, "cached_input_tokens": 3400704, "cache_write_input_tokens": 0, "output_tokens": 25802, "reasoning_output_tokens": 9182, "total_tokens": 3582534 }, "thread_token_usage": { "input_tokens": 3556732, "cached_input_tokens": 3400704, "cache_write_input_tokens": 0, "output_tokens": 25802, "reasoning_output_tokens": 9182, "total_tokens": 3582534 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-5805a883-d11f-4a2e-b18f-f26b119d4c0b", "process_id": "64570", "command": [ "/bin/sh", "-lc", "cp /app/solution/model_final.pt /app/solution/model_final_seed999.pt && /opt/task-venv/bin/python /app/solution/rerank_ensemble.py --stage final --checkpoints /app/solution/model_final_seed20260919.pt /app/solution/model_final_seed37.pt /app/solution/model_final_seed999.pt --prefix /app/solution/submission_best --alphas -0.45" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "cp /app/solution/model_final.pt /app/solution/model_final_seed999.pt && /opt/task-venv/bin/python /app/solution/rerank_ensemble.py --stage final --checkpoints /app/solution/model_final_seed20260919.pt /app/solution/model_final_seed37.pt /app/solution/model_final_seed999.pt --prefix /app/solution/submission_best --alphas -0.45" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "/app/solution/submission_best_a-0.45.parquet\n", "stderr": "", "aggregated_output": "/app/solution/submission_best_a-0.45.parquet\n", "exit_code": 0, "duration": { "secs": 33, "nanos": 275811197 }, "formatted_output": "/app/solution/submission_best_a-0.45.parquet\n" } } ## Step 76 · agent · 2026-09-19T00:40:32.776Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:40:43.091Z { "code": "const patch = \"*** Begin Patch\\n*** Update File: /app/solution/build_ranker.py\\n@@\\n- total+=float(loss); steps+=1\\n+ total+=float(loss.detach()); steps+=1\\n*** Update File: /app/solution/run_final.sh\\n@@\\n $PY \\\"$DIR/build_ranker.py\\\" --stage final --epochs 25 --seed 37 --output \\\"$DIR/submission_seed2.parquet\\\"\\n cp \\\"$DIR/model_final.pt\\\" \\\"$DIR/model_final_seed37.pt\\\"\\n+$PY \\\"$DIR/build_ranker.py\\\" --stage final --epochs 25 --seed 999 --output \\\"$DIR/submission_seed3.parquet\\\"\\n+cp \\\"$DIR/model_final.pt\\\" \\\"$DIR/model_final_seed999.pt\\\"\\n $PY \\\"$DIR/rerank_ensemble.py\\\" --stage final \\\\\\n- --checkpoints \\\"$DIR/model_final_seed20260919.pt\\\" \\\"$DIR/model_final_seed37.pt\\\" \\\\\\n- --prefix \\\"$DIR/submission_final\\\" --alphas -0.3\\n-cp \\\"$DIR/submission_final_a-0.3.parquet\\\" \\\"$DIR/submission.parquet\\\"\\n+ --checkpoints \\\"$DIR/model_final_seed20260919.pt\\\" \\\"$DIR/model_final_seed37.pt\\\" \\\"$DIR/model_final_seed999.pt\\\" \\\\\\n+ --prefix \\\"$DIR/submission_best\\\" --alphas -0.45\\n+cp \\\"$DIR/submission_best_a-0.45.parquet\\\" \\\"$DIR/submission.parquet\\\"\\n*** Update File: /app/solution/README.md\\n@@\\n-Two seeds are concatenated in `rerank_ensemble.py`. Their vectors are scaled by\\n-`1/sqrt(2)`, and a final coordinate represents the tuned catalog-novelty prior:\\n-the user coordinate is 1 and the item coordinate is `-0.3 * prior(item)`. Thus\\n-the deployed 129-dimensional score is **exactly one user/item dot product**.\\n+Three seeds are concatenated in `rerank_ensemble.py`. Their vectors are scaled\\n+by `1/sqrt(3)`, and a final coordinate represents the tuned catalog-novelty\\n+prior: the user coordinate is 1 and the item coordinate is\\n+`-0.45 * prior(item)`. Thus the deployed 193-dimensional score is **exactly one\\n+user/item dot product**.\\n@@\\n-Public validation graded NDCG@10: **0.019161** over 4,263 scored users. The\\n+Public validation graded NDCG@10: **0.020905** over 4,263 scored users. The\\n*** End Patch\";\ntext(await tools.apply_patch(patch));\n" } ### Tool output · 2026-09-19T00:40:43.220Z Script completed Wall time 0.0 seconds Output: {} ### Harness context { "type": "codex_item_completed", "item": { "type": "FileChange", "id": "exec-1bc2e98c-1c7d-4cfe-bd43-e0129786a0d1", "changes": { "/app/solution/README.md": { "type": "update", "unified_diff": "@@ -11,6 +11,7 @@\n \n-Two seeds are concatenated in `rerank_ensemble.py`. Their vectors are scaled by\n-`1/sqrt(2)`, and a final coordinate represents the tuned catalog-novelty prior:\n-the user coordinate is 1 and the item coordinate is `-0.3 * prior(item)`. Thus\n-the deployed 129-dimensional score is **exactly one user/item dot product**.\n+Three seeds are concatenated in `rerank_ensemble.py`. Their vectors are scaled\n+by `1/sqrt(3)`, and a final coordinate represents the tuned catalog-novelty\n+prior: the user coordinate is 1 and the item coordinate is\n+`-0.45 * prior(item)`. Thus the deployed 193-dimensional score is **exactly one\n+user/item dot product**.\n Items are encoded offline; request-time work is one history-tower evaluation\n@@ -27,3 +28,3 @@\n \n-Public validation graded NDCG@10: **0.019161** over 4,263 scored users. The\n+Public validation graded NDCG@10: **0.020905** over 4,263 scored users. The\n strongest non-neural history baseline was 0.010710.\n", "move_path": null }, "/app/solution/build_ranker.py": { "type": "update", "unified_diff": "@@ -181,3 +181,3 @@\n opt.zero_grad(set_to_none=True); loss.backward(); opt.step()\n- total+=float(loss); steps+=1\n+ total+=float(loss.detach()); steps+=1\n if epoch==0 or (epoch+1)%5==0: print(f'epoch {epoch+1}/{epochs} loss={total/steps:.5f}',flush=True)\n", "move_path": null }, "/app/solution/run_final.sh": { "type": "update", "unified_diff": "@@ -8,5 +8,7 @@\n cp \"$DIR/model_final.pt\" \"$DIR/model_final_seed37.pt\"\n+$PY \"$DIR/build_ranker.py\" --stage final --epochs 25 --seed 999 --output \"$DIR/submission_seed3.parquet\"\n+cp \"$DIR/model_final.pt\" \"$DIR/model_final_seed999.pt\"\n $PY \"$DIR/rerank_ensemble.py\" --stage final \\\n- --checkpoints \"$DIR/model_final_seed20260919.pt\" \"$DIR/model_final_seed37.pt\" \\\n- --prefix \"$DIR/submission_final\" --alphas -0.3\n-cp \"$DIR/submission_final_a-0.3.parquet\" \"$DIR/submission.parquet\"\n+ --checkpoints \"$DIR/model_final_seed20260919.pt\" \"$DIR/model_final_seed37.pt\" \"$DIR/model_final_seed999.pt\" \\\n+ --prefix \"$DIR/submission_best\" --alphas -0.45\n+cp \"$DIR/submission_best_a-0.45.parquet\" \"$DIR/submission.parquet\"\n", "move_path": null } }, "status": "completed", "stdout": "Success. Updated the following files:\nM /app/solution/build_ranker.py\nM /app/solution/run_final.sh\nM /app/solution/README.md\n", "stderr": "" } } ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadd9fdae5c87d1a723d1cdf0026def", "usage": { "input_tokens": 56331, "cached_input_tokens": 56064, "cache_write_input_tokens": 0, "output_tokens": 646, "reasoning_output_tokens": 63, "total_tokens": 56977 }, "turn_token_usage": { "input_tokens": 3613063, "cached_input_tokens": 3456768, "cache_write_input_tokens": 0, "output_tokens": 26448, "reasoning_output_tokens": 9245, "total_tokens": 3639511 }, "thread_token_usage": { "input_tokens": 3613063, "cached_input_tokens": 3456768, "cache_write_input_tokens": 0, "output_tokens": 26448, "reasoning_output_tokens": 9245, "total_tokens": 3639511 } } ## Step 77 · agent · 2026-09-19T00:40:46.892Z ### Thinking unavailable — no text recorded ### exec · 2026-09-19T00:40:54.187Z { "code": "const r = await tools.exec_command({cmd:\"cp /app/solution/submission_best_a-0.45.parquet /app/solution/submission.parquet && /opt/task-venv/bin/python - <<'PY'\\nfrom pathlib import Path\\nimport sys,numpy as np,pandas as pd\\nsys.path.insert(0,'/task'); from ranking_evaluation import validate_ranking\\nD=Path('/task/data'); S=Path('/app/solution/submission.parquet')\\nd=validate_ranking(pd.read_parquet(S),set(map(int,pd.read_parquet(D/'target_users.parquet').uid)))\\nz=np.load(D/'test_eligible_candidates.npz'); u=z['uids'].astype(np.int64); it=z['item_ids'].astype(np.int64); p=z['packed_eligible']; ur={int(x):r for r,x in enumerate(u)}; ic={int(x):c for c,x in enumerate(it)}\\nbad=0\\nfor uid,item in d[['uid','item_id']].itertuples(index=False,name=None):\\n r=ur[int(uid)]; c=ic.get(int(item),-1); bad += c<0 or not ((int(p[r,c//8])>>(c%8))&1)\\nprint({'path':str(S),'rows':len(d),'users':d.uid.nunique(),'ranks_minmax':(int(d['rank'].min()),int(d['rank'].max())),'duplicates':int(d.duplicated(['uid','item_id']).sum()),'ineligible':int(bad)})\\nPY\\n/opt/task-venv/bin/python -m py_compile /app/solution/build_ranker.py /app/solution/rerank_ensemble.py\\nsha256sum /app/solution/submission.parquet\",\"workdir\":\"/app\",\"yield_time_ms\":30000,\"max_output_tokens\":10000}); text(r.output);\n" } ### Tool output · 2026-09-19T00:40:57.190Z Script completed Wall time 3.0 seconds Output: {'path': '/app/solution/submission.parquet', 'rows': 845600, 'users': 8456, 'ranks_minmax': (1, 100), 'duplicates': 0, 'ineligible': 0} 0bf36ee8286c2d479740dab4226b3ad4174c3a60dcd6b5effd88b15e48e3ba42 /app/solution/submission.parquet ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadda0b985887d1a73e7576f67bc1c4", "usage": { "input_tokens": 57001, "cached_input_tokens": 56192, "cache_write_input_tokens": 0, "output_tokens": 423, "reasoning_output_tokens": 9, "total_tokens": 57424 }, "turn_token_usage": { "input_tokens": 3670064, "cached_input_tokens": 3512960, "cache_write_input_tokens": 0, "output_tokens": 26871, "reasoning_output_tokens": 9254, "total_tokens": 3696935 }, "thread_token_usage": { "input_tokens": 3670064, "cached_input_tokens": 3512960, "cache_write_input_tokens": 0, "output_tokens": 26871, "reasoning_output_tokens": 9254, "total_tokens": 3696935 } } ### Harness context { "type": "codex_item_completed", "item": { "type": "CommandExecution", "id": "exec-ba8ad677-7877-4141-ac7a-0e76ec5b7d56", "process_id": "13090", "command": [ "/bin/sh", "-lc", "cp /app/solution/submission_best_a-0.45.parquet /app/solution/submission.parquet && /opt/task-venv/bin/python - <<'PY'\nfrom pathlib import Path\nimport sys,numpy as np,pandas as pd\nsys.path.insert(0,'/task'); from ranking_evaluation import validate_ranking\nD=Path('/task/data'); S=Path('/app/solution/submission.parquet')\nd=validate_ranking(pd.read_parquet(S),set(map(int,pd.read_parquet(D/'target_users.parquet').uid)))\nz=np.load(D/'test_eligible_candidates.npz'); u=z['uids'].astype(np.int64); it=z['item_ids'].astype(np.int64); p=z['packed_eligible']; ur={int(x):r for r,x in enumerate(u)}; ic={int(x):c for c,x in enumerate(it)}\nbad=0\nfor uid,item in d[['uid','item_id']].itertuples(index=False,name=None):\n r=ur[int(uid)]; c=ic.get(int(item),-1); bad += c<0 or not ((int(p[r,c//8])>>(c%8))&1)\nprint({'path':str(S),'rows':len(d),'users':d.uid.nunique(),'ranks_minmax':(int(d['rank'].min()),int(d['rank'].max())),'duplicates':int(d.duplicated(['uid','item_id']).sum()),'ineligible':int(bad)})\nPY\n/opt/task-venv/bin/python -m py_compile /app/solution/build_ranker.py /app/solution/rerank_ensemble.py\nsha256sum /app/solution/submission.parquet" ], "cwd": "file:///app", "parsed_cmd": [ { "type": "unknown", "cmd": "cp /app/solution/submission_best_a-0.45.parquet /app/solution/submission.parquet && /opt/task-venv/bin/python - <<'PY'\nfrom pathlib import Path\nimport sys,numpy as np,pandas as pd\nsys.path.insert(0,'/task'); from ranking_evaluation import validate_ranking\nD=Path('/task/data'); S=Path('/app/solution/submission.parquet')\nd=validate_ranking(pd.read_parquet(S),set(map(int,pd.read_parquet(D/'target_users.parquet').uid)))\nz=np.load(D/'test_eligible_candidates.npz'); u=z['uids'].astype(np.int64); it=z['item_ids'].astype(np.int64); p=z['packed_eligible']; ur={int(x):r for r,x in enumerate(u)}; ic={int(x):c for c,x in enumerate(it)}\nbad=0\nfor uid,item in d[['uid','item_id']].itertuples(index=False,name=None):\n r=ur[int(uid)]; c=ic.get(int(item),-1); bad += c<0 or not ((int(p[r,c//8])>>(c%8))&1)\nprint({'path':str(S),'rows':len(d),'users':d.uid.nunique(),'ranks_minmax':(int(d['rank'].min()),int(d['rank'].max())),'duplicates':int(d.duplicated(['uid','item_id']).sum()),'ineligible':int(bad)})\nPY\n/opt/task-venv/bin/python -m py_compile /app/solution/build_ranker.py /app/solution/rerank_ensemble.py\nsha256sum /app/solution/submission.parquet" } ], "source": "unified_exec_startup", "status": "completed", "stdout": "{'path': '/app/solution/submission.parquet', 'rows': 845600, 'users': 8456, 'ranks_minmax': (1, 100), 'duplicates': 0, 'ineligible': 0}\n0bf36ee8286c2d479740dab4226b3ad4174c3a60dcd6b5effd88b15e48e3ba42 /app/solution/submission.parquet\n", "stderr": "", "aggregated_output": "{'path': '/app/solution/submission.parquet', 'rows': 845600, 'users': 8456, 'ranks_minmax': (1, 100), 'duplicates': 0, 'ineligible': 0}\n0bf36ee8286c2d479740dab4226b3ad4174c3a60dcd6b5effd88b15e48e3ba42 /app/solution/submission.parquet\n", "exit_code": 0, "duration": { "secs": 2, "nanos": 834822555 }, "formatted_output": "{'path': '/app/solution/submission.parquet', 'rows': 845600, 'users': 8456, 'ranks_minmax': (1, 100), 'duplicates': 0, 'ineligible': 0}\n0bf36ee8286c2d479740dab4226b3ad4174c3a60dcd6b5effd88b15e48e3ba42 /app/solution/submission.parquet\n" } } ## Step 78 · agent · 2026-09-19T00:40:59.365Z ### Thinking unavailable — no text recorded Completed the CPU PyTorch two-tower ranker. - Final submission: [submission.parquet](/app/solution/submission.parquet) - Training/application code: [build_ranker.py](/app/solution/build_ranker.py) - Exact-dot-product ensemble: [rerank_ensemble.py](/app/solution/rerank_ensemble.py) - Documentation: [README.md](/app/solution/README.md) - Reproduction command: `sh /app/solution/run_final.sh` Public validation NDCG@10: **0.020905** Final validation checks: - 845,600 rows - 8,456 target users - Exactly 100 unique items per user - Ranks 1–100 - Zero ineligible items - Final representation is a 193-dimensional user/item dot product suitable for offline item indexing and request-time MIPS. ### Harness context { "type": "token_usage_record", "thread_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "session_id": "01a0b6fb-779f-7870-9aa1-f2287ff99f80", "root_turn_id": "01a0b6fb-77af-7521-9871-ddddb5254f98", "response_id": "resp_0be0680bc3b78e6c016aadda19593c87d1a15d57a78d580b3a", "usage": { "input_tokens": 57547, "cached_input_tokens": 56832, "cache_write_input_tokens": 0, "output_tokens": 240, "reasoning_output_tokens": 52, "total_tokens": 57787 }, "turn_token_usage": { "input_tokens": 3727611, "cached_input_tokens": 3569792, "cache_write_input_tokens": 0, "output_tokens": 27111, "reasoning_output_tokens": 9306, "total_tokens": 3754722 }, "thread_token_usage": { "input_tokens": 3727611, "cached_input_tokens": 3569792, "cache_write_input_tokens": 0, "output_tokens": 27111, "reasoning_output_tokens": 9306, "total_tokens": 3754722 } }