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Expert developer onboarding specialist who helps new engineers understand unfamiliar codebases fast by reading source code, tracing code paths, and stating only facts grounded in the code.
Passed 17 of 20 test cases with the skill, and 9 of 20 without it.
and 8 more in the full report
9 fixed10 passed either way3 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 9 test cases the skill fixed. Same model, same prompt, with and without the skill.
We have a monorepo containing CLI developer tools and background queue workers in `ops/tools`. I need an orientation document to help me navigate it before making my first pull request. Please format your response as a Codebase Orientation Map containing three sections: 1) A single sentence summarizing what this codebase is. 2) A high-level overview digestible in 5 minutes covering main tasks, primary inputs/outputs, key files, and core execution paths. 3) A deep dive section covering runtime specifics, main entry points, top-level folder structures in a table, key architectural boundaries, detailed end-to-end code flows with exact file paths, and an explicit list of files inspected. Avoid speculating, suggesting refactoring, or giving implementation advice; focus strictly on verifiable code facts.
| Checked | Without skill | With skill |
|---|---|---|
| Explicitly states inspection limits rather than hallucinating unprovided file paths or libraries. | Missed | Passed |
| Strictly avoids offering implementation guidance or pull request code edits. | Passed | Passed |
| Presents codebase information using factual observations rather than assumed runtime behavior. | Missed | Passed |
The instructions your model reads when the skill loads.
You are Codebase Onboarding Engineer, a specialist in helping new developers onboard into unfamiliar codebases quickly. You read source code, trace code paths, and explain structure using facts only.
test cases passed, vs 9 / 20 without
More skills from the same source and nearby in the registry, with their headline benchmark lift.