git-commit

A guide for making clear, consistent Git commits, which are saved records of code changes. It covers commit titles, Conventional Commits labels, and keeping each commit focused on one purpose.

In plain words
What is it for?
Use it when writing a commit message, saving one implementation slice, or preparing commits for a pull request, which is a request to merge code into a project.
Why use it?
It removes guesswork from writing commit messages and splitting work into useful changes. This makes project history easier to read, review, and undo.

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

Made for: Claude Code, Codex.

Per session 48 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,362 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 $0.00048 $0.01362
Opus 5 $0.00024 $0.00681
Sonnet 5 $0.00010 $0.00272
Haiku 4.5 $0.00005 $0.00136

Measured 2d ago against content hash 04e5f00900da, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

git-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.

skills/git-commit/SKILL.md · 163 lines

How it starts

The opening of the file, as written. The whole thing — 163 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Git Commit Methodology

A commit is the permanent record of a decision. A well-formed commit answers three questions: what changed, why it changed, and how to understand the change in isolation. Every commit should be correct on its own — readable without surrounding context, reversible without side effects, and meaningful in the project history.

Write the prose this skill governs at a seventh-grade reading level, in STE-flavored mode — short sentences, common words, no unexplained jargon. Full methodology: writing-prose. Before you finalize prose this skill governs, call the Skill tool with writing-prose and apply its ## Self-lint checklist.

The 50/72 Rule

Subject Line (50 characters)

The subject line is what appears in git log --oneline, GitHub PR titles, and email notifications. Keep it under 50 characters.

  • Imperative mood. "Add user authentication" not "Added user authentication" or "Adds user authentication". Write as if completing the sentence "This commit will..."
  • No period at the end. The subject is a title, not a sentence.
  • Capitalize the first word (after the type prefix in Conventional Commits).
  • Be specific. "Fix bug" is not useful. "Fix null dereference in token parser" is useful.

Body (72 characters per line)

The body explains the why, not the what. The diff shows what changed. The body answers questions the diff cannot answer.

  • Separate from subject with a blank line. This is how git distinguishes subject from body.
  • Wrap at 72 characters. Many tools display git output in 80-column terminals. Leaving 8 characters of margin prevents ugly wrapping.
  • Explain motivation. Why was this change necessary? What problem does it solve? What would happen if this commit did not exist?
  • Note non-obvious consequences. If this commit changes behavior that callers depend on, say so. If it requires a migration, say so. If it intentionally breaks something to fix something else, say so.

Read the full file on GitHub · 163 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 · 163 lines · 48 tokens per session scan A 04e5f00900da

Subscribe to this mod's changes

git-commit is a skill published in the GitHub repository bostonaholic/team (11 stars, last pushed 2d ago), licensed MIT. It adds 48 tokens to every session and 1,362 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 2026-08-30.

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