Commit

Creates a structured git commit message that includes embedded generation metadata — the model used, the full contents of the driving plan file, and any changes that deviated from the plan. This provides traceability between what was planned and what was actually shipped.

When to Use

Trigger this skill when the user asks to commit staged or unstaged changes, especially after plan-mode implementation. Key phrases: “commit this”, “git commit”, “make a commit”, “commit the changes”.

Instructions

Step 1 — Inspect staged changes

Run git diff --cached --stat and git diff --cached. If nothing is staged, stop and tell the user — do not proceed with an empty commit.

Step 2 — Locate the plan file

Check in priority order:

1. Any plan file path mentioned in the current conversation context (pattern ~/.claude/plans/<name>.md)
2. Most recently modified .md in ~/.claude/plans/ via:

   ls -lt ~/.claude/plans/ | grep '\.md$' | head -1 | awk '{print $NF}'
   

3. If not found, set plan_file = null

Step 3 — Read the plan file

Read the full file contents as plan_contents. On any read failure, set plan_file = null and plan_contents = null.

Step 4 — Determine model name

Read from the system context in the current conversation:

• Sonnet 4.x → "claude-sonnet-4-6"
• Opus 4.x → "claude-opus-4-6"
• Haiku 4.x → "claude-haiku-4-5-20251001"

Default to "claude-sonnet-4-6" if uncertain.

Step 5 — Draft the commit message

Use conventional commit format: <type>: <short description under 72 chars> followed by 2–6 bullet points describing logical changes.

Valid types: feat, fix, docs, refactor, test, chore, build, ci, style, perf

Step 6 — Identify unplanned changes

Compare staged files against files named in the plan. An unplanned change is any staged file not described in the plan, or any change that goes beyond what the plan described.

Format each as: "<filepath>: <brief description>"

Use an empty array if all changes match the plan or if the plan is unavailable.

Step 7 — Build the HTML comment block

Construct the metadata comment only if plan_file is not null:

<!-- generation-metadata
{
  "model": "<model>",
  "plan_file": "<absolute tilde-expanded path>",
  "plan_contents": "<full plan text escaped as JSON string>",
  "unplanned_changes": ["<desc>", ...]
}
-->

JSON-escape plan_contents: replace " → \", newlines → \n. Use the full absolute path (no ~ shorthand) for plan_file.

Step 8 — Confirm if ambiguous

Show the drafted message and ask the user for confirmation before committing if any of these are true:

• Unplanned changes exist
• No plan file was found
• More than 20 files are staged

Step 9 — Execute the commit via heredoc

The full commit message structure is:

<type>: <description>

- <bullet 1>
- <bullet 2>

<!-- generation-metadata
{ ... }
-->

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Use the 'EOF' (quoted) heredoc delimiter to prevent shell interpolation of special characters inside the message body:

git commit -m "$(cat <<'EOF'
feat: your message here

- bullet one
- bullet two

<!-- generation-metadata
{
  "model": "claude-sonnet-4-6",
  "plan_file": "/Users/jburns/.claude/plans/example.md",
  "plan_contents": "...",
  "unplanned_changes": []
}
-->

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
EOF
)"

Omit the HTML comment block entirely when plan_file is null.

Step 10 — Verify and report

Run git log --oneline -1 and git status. Report the commit hash to the user. On failure, report the error clearly — do not retry automatically.

Examples

Example 1 — Plan-driven commit with no unplanned changes:

feat: migrate to custom domain temporal-bootcamp.liatr.io

- Update docusaurus.config.ts url/baseUrl for custom domain
- Add static/CNAME for GitHub Pages custom domain routing
- Update CLAUDE.md architecture section with new domain

<!-- generation-metadata
{
  "model": "claude-sonnet-4-6",
  "plan_file": "/Users/jburns/.claude/plans/mighty-coalescing-island.md",
  "plan_contents": "# Plan: Custom Domain...\n\n...",
  "unplanned_changes": []
}
-->

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Example 2 — Unplanned change detected (agent confirms with user first):

"unplanned_changes": [
  "src/pages/404.tsx: fixed hardcoded /liatrio-temporal-bootcamp/ paths to / (build failure discovered during verification)"
]

Example 3 — No plan file found (omit HTML comment block entirely):

chore: update dependency versions

- Bump lodash from 4.17.19 to 4.17.21

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>