commit-message

A tool that examines Git changes and writes Conventional Commit messages, a shared format such as “fix” for a bug or “feat” for a new feature.

In plain words
What is it for?
Use it to review staged or unstaged changes, suggest separate commits for unrelated work, and generate messages for selected files.
Why use it?
It removes the need to inspect every changed file manually and helps keep commit history clear and consistently organised.

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

Made for: Claude Code, Codex.

Per session 49 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,195 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 $0.00049 $0.01195
Opus 5 $0.00024 $0.00598
Sonnet 5 $0.00010 $0.00239
Haiku 4.5 $0.00005 $0.00120

Measured yesterday against content hash dae62e43b4f7, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

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 yesterday.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/analyze_changes.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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/commit-message/SKILL.md · 151 lines

How it starts

The opening of the file, as written. The whole thing — 151 lines — stays where its author put it; the contents beside it link to each section on GitHub.

commit-message

Analyze git changes and generate context-aware commit messages following Conventional Commits.

Quick Start

# Analyze all changes
python3 .shared/commit-message/scripts/analyze_changes.py --analyze

# Get batch commit suggestions
python3 .shared/commit-message/scripts/analyze_changes.py --batch

# Generate message for specific files
python3 .shared/commit-message/scripts/analyze_changes.py --generate "src/api/*.py"

Commands

Command Description
--analyze Show all changed files with status and categories
--batch Suggest how to split changes into multiple commits
--generate [pattern] Generate commit message for matching files
--staged Only analyze staged changes (default: all changes)

Commit Types

Type Description Example
feat New feature feat(api): add user authentication
fix Bug fix fix(db): resolve connection timeout
refactor Code restructuring refactor(utils): simplify helper functions
docs Documentation docs: update README
test Tests test(api): add user endpoint tests
chore Maintenance chore: update dependencies
style Formatting style: fix linting errors

Batch Commit Workflow

When you have multiple unrelated changes:

  1. Run --batch to see suggested commit groups
  2. Stage files for first commit: git add <files>
  3. Commit with suggested message
  4. Repeat for remaining groups

Grouping Strategy

Files are grouped by:

  • Directory/Module: src/api/, tests/, docs/
  • Change Type: Added vs Modified vs Deleted
  • Semantic Relationship: Related files together

Context-Aware Commit Messages

Note: The analyze_changes.py script provides file grouping and basic suggestions. Use its output as a starting point, then read git diff to understand the actual changes and generate context-aware messages following the examples below.

Read the full file on GitHub · 151 lines

Files

What ships with it

2 files 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. yesterday First seen · 151 lines · 49 tokens per session scan A dae62e43b4f7

Subscribe to this mod's changes

commit-message is a skill published in the GitHub repository jiatastic/open-python-skills (9 stars, last pushed 7mo ago), licensed MIT. It adds 49 tokens to every session and 1,195 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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