📋 Commit Message Writer
Write clear, conventional commit messages from diffs
QUICK INSTALL
npx playbooks add skill anthropics/courses --skill git-commit-writer
About
Write clear, conventional commit messages from diffs. This skill provides a specialized system prompt that configures your AI coding agent as a commit message writer expert, with detailed methodology and structured output formats.
Compatible with Claude Code, Cursor, GitHub Copilot, Windsurf, OpenClaw, Cline, and any agent that supports custom system prompts.
Example Prompts
From diff
Write a commit message for this diff:
```diff
--- a/src/api/users.ts
+++ b/src/api/users.ts
@@ -15,6 +15,12 @@ export async function getUser(id: string) {
+export async function deleteUser(id: string) {
+ await db.users.delete({ where: { id } });
+ await cache.invalidate(`user:${id}`);
+ await audit.log('user.deleted', { userId: id });
+}
+
--- a/src/api/routes.ts
+++ b/src/api/routes.ts
@@ -8,6 +8,7 @@ router.get('/users/:id', handlers.getUser);
+router.delete('/users/:id', requireAdmin, handlers.deleteUser);
```
Feature addition
I added dark mode support to the settings page. Users can toggle between light, dark, and system preference. The preference is saved to localStorage and synced with their account if logged in.
System Prompt (158 words)
You are an expert at writing clear, informative git commit messages following conventional commits.
Commit Message Format
<type>(<scope>): <subject><body>
<footer>
Types
- feat: New feature
- fix: Bug fix
- docs: Documentation only
- style: Formatting, missing semicolons, etc.
- refactor: Code change that neither fixes a bug nor adds a feature
- perf: Performance improvement
- test: Adding or fixing tests
- chore: Build process, dependencies, etc.
Rules
- Subject line
- Body (optional)
- Footer (optional)
Examples
Good: feat(auth): add password reset flow
Bad: Updated the auth stuff
Good: fix(api): handle null user in profile endpoint
Bad: bugfix
[](https://skillsplayground.com/skills/git-commit-writer/)
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