Commit

Git Commit

Create a well-formatted git commit using the project's commit conventions.

User hint: $ARGUMENTS

Context

Current branch — run this command and read the output:

git branch --show-current

Working tree status — run this command and read the output:

git status --short

Staged changes (stat) — run this command and read the output:

git diff --cached --stat

Unstaged changes (stat) — run this command and read the output:

git diff --stat

Full diff against HEAD — run this command and read the output:

git diff HEAD

Recent commits (for style matching) — run this command and read the output:

git log --oneline -10

Commit Convention

Read the project's AGENTS.md and/or CLAUDE.md to discover the commit message format. Look for:

• Subject line format (e.g., Scope(type[detail]) description, Conventional Commits type(scope): description, or other patterns)
• Body structure (e.g., why:/what: sections)
• Component naming conventions

If no project convention is found, fall back to Conventional Commits: type(scope): description.

Match the style of the recent commits shown above — capitalization, tense, level of detail.

Message scope

Commit messages are the canonical home for branch-internal narrative — renames, refactors, attempts-then-reverts, intermediate states, "first I tried X" stories. Put that content here, not in the artifacts the commit modifies (code, docstrings, README, CHANGES, PR descriptions). See AGENTS.md § AI Slop Prevention.

Procedure

1. Analyze Changes

• Review the full diff to understand what changed
• Determine the commit type (feat, fix, refactor, docs, chore, test, style, etc.)
• Determine the scope/component from the files and modules touched
• Check topic coherence: if the changes span unrelated topics, warn the user and suggest splitting into separate commits

2. Determine Staging

• If files are already staged (git diff --cached is non-empty): respect the user's staging — only commit what is staged
• If nothing is staged: auto-stage changed files, but:
  • Never stage sensitive files: .env, .env.*, *.pem, *.key, *credentials*, *secret*, *.p12, *.pfx, id_rsa*, *.keystore
  • Use git add <specific-files> — never git add -A or git add .
  • Tell the user which files you are staging

3. Draft Commit Message

• Follow the project's commit format discovered above
• If the user provided $ARGUMENTS, use it as a hint for the description — but always enforce the project's format
• Include a body (why:/what: or equivalent) when:
  • Multiple files are changed
  • The change is non-trivial
  • The diff is not self-explanatory
• Show the proposed commit message to the user before executing

Line wrapping

Wrap commit message body lines at 72 characters. This is the git convention and ensures readable output in git log, terminals, and email-based review.

Overflow exceptions — do NOT break these tokens across lines; place them at the end of a line or on their own line:

• URLs
• commit hashes
• stack traces
• file paths
• long identifiers (class names, function signatures)

If a bullet point exceeds 72 characters due to an overflow token, let the line run long rather than wrapping mid-token.

3a. Version & Dependency Bump Commits

When the changes are version bumps or dependency updates, use this specialized format:

Single package — compact subject with body:

scope(tool) old_version -> new_version

Body: link the release tag and changelog:

- https://github.com/owner/repo/releases/tag/vX.Y.Z
- https://github.com/owner/repo/blob/vX.Y.Z/CHANGELOG.md

Multiple packages — list each in the body:

scope(chore) Bump tool1, tool2, tool3

- tool1 1.2.0 -> 1.3.0 (March 5, 2026)
  - https://github.com/owner/tool1/releases/tag/v1.3.0
  - https://github.com/owner/tool1/blob/v1.3.0/CHANGELOG.md
- tool2 0.9.1 -> 0.10.0 (February 28, 2026)
  - https://github.com/owner/tool2/releases/tag/v0.10.0
  - https://github.com/owner/tool2/blob/v0.10.0/CHANGELOG.md

URL guidelines:

• Use /releases/tag/ for release pages
• Use /blob/<tag>/CHANGELOG.md for changelogs pinned to the release tag — not /blob/main/ unless no tags exist
• Use arrow notation for version transitions: v1.2.0 → v1.3.0 or 1.2.0 -> 1.3.0

4. Commit

• For single-line messages:

  git commit -m "the message"
  

• For messages with a body, use heredoc to preserve formatting:

  git commit -m "$(cat <<'EOF'
  subject line
  
  why: ...
  what:
  - ...
  EOF
  )"
  

• If a pre-commit hook fails:
  • Read the hook output to understand the failure
  • Fix the issue (formatting, lint, etc.)
  • Re-stage the fixed files
  • Create a new commit — never use --amend (the failed commit does not exist)

5. Confirm Result

• Run git log --oneline -1 to show the created commit
• Run git status to show the remaining working tree state
• Report success to the user

Commit Quality Guide

Do

• Proportional detail — small fix gets a concise body; large feature gets structured sub-sections (Changes, Test coverage)
• why: explains motivation; what: lists specific technical changes — reader understands the reason before the implementation
• Quantify impact for performance changes — include before/after numbers and percentages
• Before/after examples for bug fixes — show broken vs fixed behavior inline when helpful
• Cross-reference related PRs/issues with Fixes #N or See also: <URL>
• List specific files changed when multiple modules are touched
• Version bumps — include release date, release tag URL, and changelog URL
• Arrow notation for version transitions: v1.2.0 → v1.3.0 or 1.2.0 -> 1.3.0
• Wrap body at 72 characters — the git convention; let URLs, paths, hashes, and identifiers overflow rather than breaking mid-token

Don't

• Vague subjects: "update code", "fix bug", "misc changes"
• Redundant type-in-description: "feat: add new feature" — the type already says feat
• #PR_NUMBER in commit messages — PR numbers belong in CHANGES entries, not commits; git merge history already tracks PR association
• Bodies longer than the change warrants — a one-line typo fix doesn't need 10 bullets
• Omitting the body when changes span multiple files or the diff is non-obvious
• Counts of files, lines, or tests changed — these duplicate git diff --stat and become stale; describe what changed, not how many

Rules

• Never run git push, git push --force, git reset --hard, or any destructive git command
• Never use --amend — always create new commits
• Never use --no-verify or --no-gpg-sign
• Never create empty commits
• Never use git add -A or git add .
• Never commit files that likely contain secrets (.env, credentials, keys)
• Always use heredoc when the commit message has a body (multi-line)
• Always present the proposed commit message before executing git commit
• If there are no changes to commit, report "Nothing to commit" and stop

Portability notes

• $ARGUMENTS — the text the user passed when invoking this skill. If your host does not substitute it, read it as the user's request in the current turn, and ask when there is none.