caveman-commit

A short-form commit-message writer that follows the Conventional Commits format, a shared style for labeling changes such as features, fixes, tests, or documentation. It keeps the subject brief and adds a body only when the reason or migration details need explanation.

In plain words
What is it for?
Use it to turn a code change into a concise commit message, including an appropriate type, optional scope, imperative summary, and a short explanation when needed.
Why use it?
It removes vague, repetitive wording from Git history and makes commits easier to scan. The rules also help keep messages consistent across a project.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/john-data-chen/hermes-agent-backup/caveman-commit
Any agent
npx skills add john-data-chen/hermes-agent-backup --skill caveman-commit
Clone the repo
git clone --depth 1 https://github.com/john-data-chen/hermes-agent-backup

Made for: Claude Code, Codex.

Per session 79 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 654 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 89% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00079 $0.00654
Opus 5 $0.00039 $0.00327
Sonnet 5 $0.00016 $0.00131
Haiku 4.5 $0.00008 $0.00065

Measured 2d ago against content hash 02be92720a46, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

caveman-commit scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

89% identical to caveman-commit — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/caveman-commit/SKILL.md · 65 lines

What it actually says

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.

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 65 lines · 79 tokens per session scan A 02be92720a46

Subscribe to this mod's changes

caveman-commit is a skill published in the GitHub repository john-data-chen/hermes-agent-backup (2 stars, last pushed 1mo ago), licensed MIT. It adds 79 tokens to every session and 654 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. It is 89% identical to caveman-commit, differing in 2 lines, and is treated as a copy.

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