write-commit

A guide for writing clear Git commit messages in the Conventional Commits format, which labels changes such as features, fixes, tests, and maintenance.

In plain words
What is it for?
Use it when creating a commit message or when you need to choose the right change type, scope, and wording.
Why use it?
It removes the guesswork from describing staged changes and helps keep commit history consistent and easy to scan.

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/marmot-protocol/agent-config/write-commit
Any agent
npx skills add marmot-protocol/agent-config --skill write-commit
Clone the repo
git clone --depth 1 https://github.com/marmot-protocol/agent-config

Made for: Claude Code, Codex.

Per session 29 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 760 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found 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 $0.00029 $0.00760
Opus 5 $0.00015 $0.00380
Sonnet 5 $0.00006 $0.00152
Haiku 4.5 $0.00003 $0.00076

Measured yesterday against content hash 9f6b381bd40a, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

write-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 yesterday.

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.

opencode/skills/write-commit/SKILL.md · 124 lines

How it starts

The opening of the file, as written. The whole thing — 124 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Write Commit Skill

You are an expert at crafting clear, informative commit messages following conventional commit standards.

Activation

This skill activates when:

  • User asks for help with a commit message
  • User wants to commit changes
  • Context involves staged git changes
  • User mentions "conventional commit"

Conventional Commit Format

<type>(<scope>): <subject>

[optional body]

[optional footer]

Commit Types

Type Use When
feat Adding new functionality
fix Fixing a bug
docs Documentation only changes
style Formatting, missing semicolons (no code change)
refactor Code change that neither fixes nor adds
test Adding or correcting tests
chore Maintenance, build process, dependencies
perf Performance improvement
ci CI configuration changes
revert Reverting a previous commit

Writing Guidelines

Subject Line (First Line)

  • 50 characters or less (hard limit: 72)
  • Imperative mood: "add feature" not "added feature"
  • No period at the end
  • Lowercase after the colon
  • Specific: "add user logout button" not "update UI"

Scope (Optional)

  • Module or component affected
  • Keep it short: auth, api, ui, db
  • Use consistently across project

Body (Optional but Recommended)

  • Wrap at 72 characters
  • Explain what and why, not how
  • Separate from subject with blank line
  • Use bullet points for multiple items

Footer (Optional)

  • Breaking changes: BREAKING CHANGE: description
  • Issue references: Fixes #123, Closes #456
  • Co-authors: Co-authored-by: Name <email>

Tools to Use

  • commit_message - Analyze staged changes and suggest message
  • commit - Create the actual git commit
  • diff-analyze - Detailed change breakdown

Examples

Simple Feature

feat(auth): add password strength indicator

Display real-time password strength feedback during registration.
Uses zxcvbn library for accurate strength estimation.

Read the full file on GitHub · 124 lines

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. yesterday First seen · 124 lines · 29 tokens per session scan A 9f6b381bd40a

Subscribe to this mod's changes

write-commit is a skill published in the GitHub repository marmot-protocol/agent-config (2 stars, last pushed 7mo ago), licensed MIT. It adds 29 tokens to every session and 760 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Related

Other skills, from other repositories

systematic-debugging

Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes.

obra/superpowers · 21 tokens

next-cache-components-adoption

Turn on Cache Components in a Next.js app and resolve the blocking routes it surfaces. Use when the user wants to enable, adopt, or migrate to Cache Components, flip the cacheComponents flag, work through a flood of blocking-prerender / instant validation errors, run the cache-components-instant-false codemod, or…

vercel/next.js · 95 tokens

babysit-pr

Babysit a GitHub pull request after creation by continuously polling review comments, CI checks/workflow runs, and mergeability state until the PR is merged/closed or user help is required. Diagnose failures, retry likely flaky failures up to 3 times, auto-fix/push branch-related issues when appropriate, and keep…

openai/codex · 114 tokens

imagegen

Generate or edit raster images when the task benefits from AI-created bitmap visuals such as photos, illustrations, textures, sprites, mockups, or transparent-background cutouts. Use when Codex should create a brand-new image, transform an existing image, or derive visual variants from references, and the output…

openai/codex · 113 tokens

cpu-profile-analysis

Analyze V8/Chrome CPU profiles (.cpuprofile) and DevTools trace files (Trace-.json). Use when: profiling performance, investigating slow functions, comparing code paths, finding bottlenecks, analyzing timeToRequest, understanding call trees from sampling profiler data, analyzing layout/paint/rendering, investigating…

microsoft/vscode · 71 tokens

next-cache-components-optimizer

Drive a Next.js route to instant navigation by setting up an agentic loop, under Cache Components / PPR, on initial load (hard navigation) and client-side navigation (soft navigation). Encode the goal as a failing @next/playwright instant() e2e and work it to green, one verified route at a time; the shipped test then…

vercel/next.js · 170 tokens