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repo-docs — Repository Understanding Docs Builder

Builds and maintains a Markdown guide that explains a repository through one real, evidence-backed behavior instead of a file-tree tour.

Dev & CodingIntermediate★ 430⑂ 7AI score 10/10Last updated: Jul 12, 2026

What it does

  • Forces a reader-first model: pick one real behavior (a request, task, data path, or failure) and walk it end to end before mapping the tree.
  • Generates a defined doc package — README.md, walkthroughs/one-real-run.md, code-map.md, modules/, references/source-evidence.md, glossary.md, change-log.md — with Lite mode for small repos and Seed mode for projects with no code yet.
  • Requires evidence before claims and records it in a Claim | Evidence | Confidence | Caveat audit table with two traversal passes.
  • Adds a sync decision gate (none / answer-only / foreground patch / background sync) so ordinary repo questions don't trigger noisy doc rewrites.
  • Ships scripts/validate_repo_docs.py to check structure, links, freshness, evidence, and references scope before delivery.

Who it's for

  • Tech leads who need real onboarding docs, not a generated file listing
  • Developers inheriting an unfamiliar or legacy codebase
  • Monorepo owners who want scoped docs for a single subsystem
  • Teams whose docs constantly drift from the code

Examples

  1. "Help me understand this repo — generate repo-docs" → inspects entrypoints, tests, config across two passes, picks a representative behavior, then writes the walkthrough and code map.
  2. "I refactored the billing module, sync the docs" → runs the decision gate, patches only the owning page, and logs Synced through <sha> in change-log.md.
  3. "We only have a design doc so far" → Seed mode with Confirmed / Planned / Unknown labels.
  4. "Delete the generated repo docs" → removes the package plus stale root agent-file pointers.

· · · Install guide · · ·

Try it now, no install

Paste this into Claude to use the skill without installing anything.

Read the instructions in this file and follow them to help me:
https://raw.githubusercontent.com/YurunChen/repo-docs-skills/HEAD/skills/repo-docs/SKILL.md

What I want: (describe your task here)

If Claude can't open the link, open it yourself and paste the contents instead.

↓ If it works for you, download the ZIP below and install it. Then it runs on its own — no pasting each time.

Install in the Claude app (no terminal)
  1. Download the ZIP with the button below.
  2. In Claude, open Settings → Capabilities and turn on 'Code execution and file creation'. (one time)
  3. Go to Customize → Skills → + → 'Upload a skill' and upload the ZIP.
↓ Download ZIP
Install in Claude Code

Let Claude do it — paste this into Claude Code

Install the skill I found on Claude Skill Mart.
Copy the skills/repo-docs folder from the GitHub repo YurunChen/repo-docs-skills into my ~/.claude/skills/yurunchen-repo-docs/.
When it's done, tell me in one line what this skill can do.

Install with a command instead

git clone https://github.com/YurunChen/repo-docs-skills.git /tmp/repo-docs-skills && mkdir -p ~/.claude/skills && cp -r /tmp/repo-docs-skills/skills/repo-docs ~/.claude/skills/

⚠ This is a third-party skill. Check the source repository before installing.

  1. Open a terminal.
  2. Clone the repo: git clone https://github.com/YurunChen/repo-docs-skills.git /tmp/repo-docs-skills
  3. Create the skills folder: mkdir -p ~/.claude/skills
  4. Copy the skill: cp -r /tmp/repo-docs-skills/skills/repo-docs ~/.claude/skills/ (also copy skills/repo-docs-zh if you want the Chinese overlay).
  5. Confirm Python is available with python3 --version — the validator script needs it.
  6. Restart Claude Code, open your target project directory, and ask: "use repo-docs to document this repository".
  7. When it finishes, start reading at repo-docs/README.md and check the reported validator result.
View source on GitHub ↗