generate-commit-message

A guide that examines uncommitted code changes and writes a commit message using Conventional Commits, a standard format for describing software changes.

In plain words
What is it for?
Use it before committing changes to produce messages for features, fixes, documentation, tests, maintenance, and other change types.
Why use it?
It removes the need to work out the right commit type and wording by hand.

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/tada5hi/skills/generate-commit-message
Any agent
npx skills add tada5hi/skills --skill generate-commit-message
Clone the repo
git clone --depth 1 https://github.com/tada5hi/skills

Made for: Claude Code, Codex.

Per session 47 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,079 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 $0.00047 $0.01079
Opus 5 $0.00023 $0.00540
Sonnet 5 $0.00009 $0.00216
Haiku 4.5 $0.00005 $0.00108

Measured 2d ago against content hash a5b74caec503, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

generate-commit-message 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.

skills/generate-commit-message/SKILL.md · 107 lines

How it starts

The opening of the file, as written. The whole thing — 107 lines — stays where its author put it; the contents beside it link to each section on GitHub.

generate-commit-message

Analyze uncommitted changes in the working directory and generate a commit message following the Conventional Commits 1.0.0 specification.

Conventional Commits Format

<type>[optional scope]: <description>

[optional body]

[optional footer(s)]

Types

Type When to use
feat A new feature (SemVer MINOR)
fix A bug fix (SemVer PATCH)
build Changes to the build system or external dependencies
chore Maintenance tasks that don't modify src or test files
ci Changes to CI configuration files and scripts
docs Documentation-only changes
style Formatting, whitespace, semicolons — no code logic change
refactor Code change that neither fixes a bug nor adds a feature
perf A code change that improves performance
test Adding or correcting tests

Breaking changes

Indicate breaking changes (SemVer MAJOR) by either:

  • Adding ! after the type/scope: feat(api)!: remove deprecated endpoint
  • Adding a BREAKING CHANGE: footer (must be uppercase)

Step 1: Gather changes

Run these commands to understand the current state:

# Check what's staged vs unstaged
git status --short

# Show staged changes (if any)
git diff --cached --stat
git diff --cached

# Show unstaged changes (if any)
git diff --stat
git diff

# Show untracked files that might be relevant
git ls-files --others --exclude-standard

# Get recent commit messages for style reference
git log --oneline -10

Important:

  • If there are no staged changes and no unstaged changes, inform the user there is nothing to commit and stop.
  • If there are both staged and unstaged changes, generate the message based on staged changes only (what git commit would include). Mention that unstaged changes exist but won't be included.
  • If nothing is staged but there are unstaged changes, generate the message for all unstaged changes and note that the user will need to stage them first.

Read the full file on GitHub · 107 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. 2d ago First seen · 107 lines · 47 tokens per session scan A a5b74caec503

Subscribe to this mod's changes

generate-commit-message is a skill published in the GitHub repository tada5hi/skills (2 stars, last pushed 21d ago), licensed Apache-2.0. It adds 47 tokens to every session and 1,079 once invoked, about $0.0002 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.

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