Git Commit Skill

Sensitive File Guard

Before staging, scan git status for sensitive patterns:

• .env*, *.pem, *.key, *.p12, *.pfx
• *.tfstate, *.tfvars (with real values)
• credentials.json, serviceAccountKey.json, *secret*

If a match is found:

1. Append the missing pattern to .gitignore and stage .gitignore.
2. If the file is already tracked, warn and suggest git rm --cached <file>.
3. Never proceed with committing a sensitive file.

Smart Commit Workflow

1. Review

git status
git diff
git diff --cached
git log --oneline -5

2. Run Sensitive File Guard

Scan the output of git status against the patterns above.

3. Auto-stage tracked changes

git add -u

Stage tracked modifications and deletions only. Do not stage untracked files automatically — review them first and stage by name if appropriate.

4. Analyse for multi-concern splitting

Group changed files by directory or feature area. If changes span unrelated concerns (e.g. a bug fix and a new feature), split into separate commits automatically.

5. Generate commit message

• Infer type from the change: feat, fix, chore, docs, refactor, test, style.
• Infer scope from the primary directory or feature area (e.g. components, terraform, skills).
• Subject line: imperative voice, under 72 characters.
• Body (optional): explain "why", not "what".

6. Commit via heredoc

git commit -m "$(cat <<'EOF'
type(scope): subject line

Optional body.

Co-Authored-By: Claude <model> <noreply@anthropic.com>
EOF
)"

Replace <model> with the actual model name (e.g. Opus 4.6, Sonnet 4.6).

7. Handle pre-commit hook failure

Fix the issue, re-stage, and create a new commit. Never use --no-verify. Never amend — the failed commit does not exist.

Worktree Workflow

When working in a git worktree (.claude/worktrees/<name>/):

1. Smart commit all changes in the worktree using the workflow above.
2. Switch to main in the primary working directory.
3. Squash-merge the worktree branch:

   git merge --squash <worktree-branch>
   

4. Commit the squashed result with a single well-formed message.
5. Verify: git log --oneline -5 && git status.
6. Remove the worktree: git worktree remove .claude/worktrees/<name>.

Rules: commit before merging, always merge into main, never delete the branch before merge is confirmed, use --squash to keep history linear.

Rules

• Proceed without confirmation — do not ask the user to approve the commit message or confirm before committing. Stage, generate the message, and commit in one flow.
• Never commit sensitive files (run the guard first).
• Never amend a published commit — create a new one.
• Never force-push main.
• Never use --no-verify or --no-gpg-sign.
• Prefer named files over git add -A to avoid staging secrets or noise.
• Formatting and linting run automatically via hooks.

Quick Reference

• Run Sensitive File Guard before every commit.
• Auto-stage tracked changes with git add -u, review untracked files individually.
• Split unrelated concerns into separate commits.
• Conventional Commits with auto-detected type and scope.
• Commit via heredoc with Co-Authored-By trailer.
• Worktree: commit, squash-merge to main, verify, remove.