Mo Hooks

mo-hooks - Auto-Update Hooks Setup

Set up Git hooks so README_AI.md files automatically update when code changes are committed.

How It Works

Architecture: Thin wrapper shell script → Python logic (auto-upgradeable via pip)

When a developer commits code changes:

1. Shell wrapper skips doc-only commits (loop guard), activates venv
2. Delegates to codeindex hooks run post-commit (Python)
3. codeindex affected --json analyzes the change scope
4. codeindex scan regenerates structural README_AI.md for affected directories
5. Updated README_AI.md files are auto-committed

Key: Hook only updates structural content. AI blockquote descriptions (module purpose) are not regenerated per-commit — run codeindex scan-all to refresh those.

Upgrade: pip install --upgrade ai-codeindex auto-updates hook logic. No need to reinstall hooks after package upgrade.

Prerequisites

# 1. codeindex must be installed
which codeindex || echo "Not installed. Run: pip install ai-codeindex"

# 2. Project must be a git repository
git rev-parse --is-inside-work-tree

# 3. Project must have codeindex config
cat .codeindex.yaml 2>/dev/null || codeindex init

Setup Workflow

Step 1: Check Current Hook Status

codeindex hooks status

This shows which hooks are installed (pre-commit, post-commit, pre-push).

Step 2: Install Post-Commit Hook

# Install just the post-commit hook (recommended)
codeindex hooks install post-commit

# Or install all hooks
codeindex hooks install --all

If a custom post-commit hook already exists, it will be backed up automatically.

Step 3: Configure Hook Behavior

Edit .codeindex.yaml to add/adjust the hooks section:

# Git Hooks configuration
hooks:
  post_commit:
    enabled: true
    mode: auto          # auto | sync | async | prompt | disabled
    max_dirs_sync: 2    # Threshold for sync vs async (auto mode)

Modes explained:

Step 4: Verify Setup

# Check hook is installed
codeindex hooks status

# Make a test change and commit
echo "# test" >> some_file.py
git add some_file.py
git commit -m "test: verify auto-update hook"

# Check if README_AI.md was updated
git log --oneline -2
# Should see: "docs: auto-update README_AI.md for <hash>"

Step 5: Generate Initial Index (if not done)

The hook only updates existing README_AI.md files. Generate the initial index first:

codeindex scan-all
git add -A && git commit -m "docs: initial README_AI.md generation"

Example Session

User: Set up auto-updating docs for this project

Claude: I'll set up the codeindex post-commit hook so README_AI.md
files stay in sync with code changes.

> codeindex hooks status
  ○ pre-commit: not installed
  ○ post-commit: not installed
  ○ pre-push: not installed

> codeindex hooks install post-commit
  ✓ post-commit: installed

Let me also make sure the hooks config is in .codeindex.yaml...

> cat .codeindex.yaml
[checks for hooks section]

Done! Post-commit hook installed. Now when you commit code changes:
- README_AI.md files auto-update for affected directories
- Updates are committed automatically
- Doc-only commits are skipped (no infinite loops)

Uninstalling

# Remove post-commit hook (restores backup if exists)
codeindex hooks uninstall post-commit

# Remove all codeindex hooks
codeindex hooks uninstall --all

Upgrading Hooks

# Usually NOT needed — pip upgrade auto-updates Python logic
pip install --upgrade ai-codeindex

# Only if release notes say "reinstall hooks":
codeindex hooks install post-commit --force

Troubleshooting

Advanced: CLAUDE.md Integration

Add this to your project's CLAUDE.md to teach AI agents about the auto-update:

## Documentation Auto-Updates

This project uses codeindex with post-commit hooks.
README_AI.md files auto-update when code changes.

- **Read README_AI.md first** before exploring source code
- After modifying code, README_AI.md updates on next commit
- To manually update: `codeindex scan ./path/to/dir`
- To check coverage: `codeindex status`

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