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    Claude CodeClaude CodeCursorCursorCodex CLICodex CLIMuseMuseDotsDots+22 more

    Codebase Explainer & Onboarding Mapper

    1

    Dropping into an unfamiliar repo is slow: you don't know how to run it, which of 400 files matter, or how the pieces connect.

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    Codebase Explainer & Onboarding Mapper

    Codebase Explainer & Onboarding Mapper

    Example session with this skill installed

    Explain this repo — I just inherited it and have to add a feature next week.

    • Read your context and instructions
    • Compiled the codebase explainer

    An Onboarding Map: a TL;DR (Express API + Postgres, run with pnpm dev); the four directories that actually matter and what each does; the request lifecycle traced route → controller → service → DB; the env vars it won't boot without; a flagged gotcha ("the real payment logic lives in utils/legacy/"); and a 7-file start-here reading list — with an offer to save ONBOARDING.md.

    start-here reading list — with an offer to save ONBOARDING.md

    Connects securely to your tools. The creator never sees your data.

    What you get

    Onboard to a new team's codebase and get productive faster.Take over an inherited or legacy project you didn't write.Understand a repo before making changes or reviewing a PR on unfamiliar code.Generate an ONBOARDING.md a team can keep and reuse.

    About this skill

    Dropping into an unfamiliar repo is slow: you don't know how to run it, which of 400 files matter, or how the pieces connect. This skill builds the mental model for you and leaves behind an onboarding doc the whole team can reuse.

    It runs an ordered pass over any repo

    • Orient — language, framework, build system, and the exact install/run/test/build commands
    • Architecture overview — what the project is and its overall shape
    • Key-module map — the directories that actually matter, in priority order, with the files to read first
    • Core flows — one to three important paths traced end to end, so you see how it connects
    • Data & dependencies — stores, models, external services, and the config it needs to boot
    • Conventions & gotchas — the patterns to follow and where the real complexity hides
    • ONBOARDING.md — assembled into a doc with a "start here" reading list

    It cites real files (never invents them), separates what it verified from what it inferred, and prioritizes the 20% you need to grasp the 80%. It explains and documents — it doesn't audit code quality or security; pair it with a code-review or security gate for that.

    How to install

    Works the same in every agent - Claude, Cursor, Codex, Copilot and 20+ more.

    ~30 seconds
    1. 1

      Download the ZIP

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    2. 2

      Unzip into your skills folder

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    3. 3

      Ask your agent to use it

      Restart the agent if it was already running. It picks the skill up automatically - no config needed.

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    2 installs

    Downloaded by developers to date

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    Trust & safety

    Security scanned

    Verified clean 3 months ago

    • Passed all security checks, Safe to install

    Listed3 months ago
    Updated2 days ago

    What's inside

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