[shenxianpeng]

What

Site docs for commit-check v2.20.0 and Action v2.19.0, plus AI policy recipes.

• Policies guide, "Checking AI attribution and nothing else": for projects that only want ai_attribution, with the setup as cchk.toml and as Action env vars (subject_max_length = 0 turns the length rule off since 2.20.0).
• Policies guide, "Recipes from real projects": Kubernetes, the Linux kernel, Nextcloud, pip/attrs and Fedora/FluxCD each mapped to a few lines of cchk.toml, plus a recipe for projects that want every commit to declare AI use (Assisted-by: none when there was none). Each recipe was run against sample commits on 2.20.0.
• Rules: new ai-author (CC017) section; CC004/CC005 say 0 turns the rule off; CC013 names Continue, Mistral Vibe and Qwen Code.
• Changelog: v2.20.0 entry and highlights row.
• Python 3.11: getting started, home page facts and the Python API guide; the GitHub Action guide gets a note that ubuntu-22.04 needs actions/setup-python.
• Pins: install snippets bumped from v2.19.5 to v2.20.0.

Before / after

	Before	After
Running only the AI check	not documented; the default 80/5 length rules still apply	a recipe with conventional_commits = false and both lengths 0
Copying a known project's AI policy	not documented; projects write their own grep step	a table of five policies and their config, with two full recipes
CC017	no section (docs-sync red)	What it does / Why / Example / Options
Supported Python	3.10 – 3.15	3.11 – 3.15, with the ubuntu-22.04 note
pre-commit rev	v2.19.5	v2.20.0

New "Recipes from real projects" section:

Not in this PR

Warp, Crush and the credit trailers go in the tool list after commit-check#672 ships.

Checks

python -m pytest tests/ -q with commit-check 2.20.0: 18 passed. mkdocs build --strict: clean.

Summary by CodeRabbit

• Documentation
  • Updated the guides to describe AI-authorship checks, recognized tool signatures, and author exclusions and warnings.
  • Clarified that setting either subject-length limit to 0 disables that check.
  • Updated the documented minimum Python version to 3.11 and added GitHub Actions setup guidance.
  • Added configuration recipes and refreshed installation examples to use v2.20.0.

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[coderabbitai]

Caution

Review failed

The pull request is closed.

Walkthrough

The documentation describes CC017 AI-author checks, recognized tool signatures, zero-valued subject-length settings, and Python 3.11 support. It also updates the 2.20.0 changelog entry and pre-commit examples.

Changes: Release Documentation

Layer / File(s)	Summary
AI attribution rules and policy examples docs/rules.md, docs/guides/policies.md	The guides list additional AI signatures and document CC017 behavior, attribution configuration, and project-specific policy examples.
Runtime and configuration guidance docs/configuration.md, docs/rules.md, docs/getting-started.md, docs/index.md, docs/guides/github-actions.md, docs/guides/python-api.md	The documentation states that setting either subject-length limit to 0 disables its check. It updates the minimum Python version to 3.11 and describes the GitHub Action runner requirement. The Python API example imports tomllib directly.
Release notes and versioned examples docs/changelog.md, docs/compare/tools.md, docs/configuration.md, docs/example.md, docs/guides/pre-commit.md	The changelog adds the 2.20.0 release entry. Pre-commit examples use version v2.20.0 instead of v2.19.5.

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Other

Merge Risk: Moderate · up to efcd3

Clarify interpreter selection before merging so existing Python 3.10 setups do not encounter blocked commits. Correct the attribution recipes and support references so users understand what their configuration actually enforces.

- [ ] Autofix · Keep fixing CodeRabbit findings and required CI, and resolving merge conflicts

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