Conventional Commits

When creating a commit message, follow Conventional Commits 1.0.0.

When to use this skill

• The user asks to commit staged or unstaged changes.
• The user asks "write a commit message for this diff".
• The repo has commitlint, husky, or a CONTRIBUTING.md mentioning Conventional Commits.

How to use it

1. Inspect the change first: git diff --staged (or git diff if nothing is staged). Never invent a message without reading the diff.
2. Pick the type from the actual change, not the file names:
   • feat — user-visible behavior added
   • fix — user-visible bug fixed
   • refactor — behavior-preserving restructure
   • docs, test, build, ci, chore, style, perf
3. Add a scope when the repo already uses them (check git log --oneline -20 for the house style).
4. Subject line: imperative mood, lowercase after the colon, no trailing period, ≤ 72 chars.
5. Body (optional): explain why, wrap at 72. Footer: BREAKING CHANGE: or issue refs (Closes #123).

Decision tree

• Mixed unrelated changes in one diff → propose splitting into multiple commits instead of one vague chore.
• Change is a revert → use revert: and reference the reverted SHA.
• Unsure between fix and refactor → does an end user observe the difference? Yes = fix, no = refactor.

Done means

git log -1 --format=%s matches ^(feat|fix|refactor|docs|test|build|ci|chore|style|perf|revert)(\(.+\))?!?: .+ and the message honestly describes the diff.

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