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caveman-commit — Claude Code skill: what it does, how to install

Generates terse Conventional Commits messages focused strictly on intent. Ideal for keeping git history clean without boilerplate or AI signatures.

Install into Claude Code · Skills CLI (Vercel) All methods and platforms ↓ 
npx skills add JuliusBrussee/caveman --skill caveman-commit -a claude-code
Open on GitHub

What caveman-commit does

The skill drafts commit messages following the Conventional Commits specification. It uses standard types such as feat, fix, or refactor, keeping the subject line imperative and under 50 characters when possible. It drops filler words like "now", personal pronouns, and automated AI attribution footers.

Commit bodies appear only when necessary. The skill enforces a body for breaking changes, security fixes, migrations, or reverts where context is vital for future debugging. Self-explanatory changes stay as subject-only messages.

It has strict boundaries. The skill does not stage files, amend commits, or invoke git commit. It outputs a ready-to-paste code block instead. If you want the agent to commit code automatically, look elsewhere.

What it helps with

  • format commit messages using Conventional Commits
  • strip AI attributions and filler words from commit texts
  • document breaking changes and migrations in commit bodies
  • draft commit messages without staging or committing files

Example prompts for the agent

  • write a commit message for current changes
  • /caveman-commit
  • /commit

How to install caveman-commit

1Skills CLI (Vercel)

npx skills add JuliusBrussee/caveman --skill caveman-commit -a claude-code

2Manually: put the files in place

~/.claude/skills/caveman-commit/SKILL.md

Copy the whole skill folder; for one project use .claude/skills/caveman-commit/

From the same set22

The whole set →
caveman JuliusBrussee Cuts filler and polite greetings from agent responses while keeping technical facts and code exact. Stays active until turned off. Claude Code CX Codex Cursor +1 591,500installs caveman-review JuliusBrussee Generates terse, single-line code review comments with exact line numbers, problems, and fixes. Eliminates conversational filler in pull request reviews. Claude Code CX Codex Cursor +1 410,700installs caveman-compress JuliusBrussee Rewrites CLAUDE.md and todo files into terse caveman-speak so the model reads fewer input tokens. The source gets overwritten; a readable backup stays out of tree. Claude Code CX Codex Cursor +1 410,300installs caveman-help JuliusBrussee A quick reference for Caveman modes and commands in Claude Code and other supported hosts. Use it when you need to control response style or find related skills. Claude Code CX Codex Cursor +1 401,800installs cavecrew JuliusBrussee cavecrew delegates code searches, small edits, and diff reviews to three subagents. Use it when keeping the main agent's context lean matters. Claude Code CX Codex Cursor +1 357,900installs caveman-stats JuliusBrussee Displays recorded output and cache-read tokens for Claude Code sessions or points to host native usage stats. Useful for tracking raw token consumption. Claude Code CX Codex Cursor +1 356,700installs caveman-explore JuliusBrussee A read-only skill locates relevant files and line ranges in a repository. Use it for cold-start orientation or broad searches. Claude Code CX Codex Cursor +1 106,500installs caveman-learn JuliusBrussee This skill reads Caveman learn reports, proposes token-cost reductions, and asks for consent before each edit. Use it for heavy CLAUDE.md files or repeated context. Claude Code CX Codex Cursor +1 105,700installs

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Questions about caveman-commit

How to install caveman-commit in Claude Code?

Run npx skills add JuliusBrussee/caveman --skill caveman-commit -a claude-code in your terminal. You can also place the skill file directly at ~/.claude/skills/caveman-commit/SKILL.md.

What does caveman-commit do?

It writes concise Conventional Commits messages that prioritize the reason for a change over a raw diff description. It strips out conversational filler, emoji, and default AI attribution trailers.

Does caveman-commit run git commands?

No, the skill only creates the text block. It does not run git commit, stage changes, or amend previous commits.

Source text

SKILL.md · Apache-2.0 
---
name: caveman-commit
description: >
  Write a Conventional Commits message compressed to intent only. Use for
  "write a commit", "commit message", /commit or /caveman-commit.
---

Write commit messages terse and exact. Conventional Commits format. No fluff. Why over what.

## Rules

**Subject line:**
- `<type>(<scope>): <imperative summary>` — `<scope>` optional
- Types: `feat`, `fix`, `refactor`, `perf`, `docs`, `test`, `chore`, `build`, `ci`, `style`, `revert`
- Imperative mood: "add", "fix", "remove" — not "added", "adds", "adding"
- ≤50 chars when possible, hard cap 72
- No trailing period
- Match project convention for capitalization after the colon

**Body (only if needed):**
- Skip entirely when subject is self-explanatory
- Add body only for: non-obvious *why*, breaking changes, migration notes, linked issues
- Wrap at 72 chars
- Bullets `-` not `*`
- Reference issues/PRs at end: `Closes #42`, `Refs #17`

**What NEVER goes in:**
- "This commit does X", "I", "we", "now", "currently" — the diff says what
- "As requested by..." — use Co-authored-by trailer
- "Generated with Claude Code" or any AI attribution — unless the user's own rule requires an `Assisted-by`/AI-attribution trailer, then add it as a trailer
- Emoji (unless project convention requires)
- Restating the file name when scope already says it

## Examples

Diff: new endpoint for user profile with body explaining the why
- ❌ "feat: add a new endpoint to get user profile information from the database"
- ✅
  ```
  feat(api): add GET /users/:id/profile

  Mobile client needs profile data without the full user payload
  to reduce LTE bandwidth on cold-launch screens.

  Closes #128
  ```

Diff: breaking API change
- ✅
  ```
  feat(api)!: rename /v1/orders to /v1/checkout

  BREAKING CHANGE: clients on /v1/orders must migrate to /v1/checkout
  before 2026-06-01. Old route returns 410 after that date.
  ```

## Auto-Clarity

Always include body for: breaking changes, security fixes, data migrations, anything reverting a prior commit. Never compress these into subject-only — future debuggers need the context.

## Boundaries

Only generates the commit message. Does not run `git commit`, does not stage files, does not amend. Output the message as a code block ready to paste. "stop caveman-commit" or "normal mode": revert to verbose commit style.

© JuliusBrussee · Apache-2.0 · JuliusBrussee/caveman

See also

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