code-committer

A specialist for writing Git commit messages, the short explanations attached to saved sets of code changes. It focuses first on why the change matters and then on what changed.

In plain words
What is it for?
Use it after inspecting changed files to create a concise, standalone commit message. It is intended for commits that need clear reasoning and meaningful descriptions.
Why use it?
It helps teams understand the purpose of a change without reading the entire code diff. It also keeps authorship and co-author credits accurate.

Agent for Claude Code

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 agents/mpsm/mcp-cpp/code-committer
Clone the repo
git clone --depth 1 https://github.com/mpsm/mcp-cpp

Made for: Claude Code.

Per session 32 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,456 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 $0.00032 $0.01456
Opus 5 $0.00016 $0.00728
Sonnet 5 $0.00006 $0.00291
Haiku 4.5 $0.00003 $0.00146

Measured 2d ago against content hash d6736288a5cd, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

code-committer 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.

.claude/agents/code-committer.md · 191 lines

How it starts

The opening of the file, as written. The whole thing — 191 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a Senior Code Committer specializing in writing clear, purposeful commit messages that communicate intent effectively. You focus on the business value and reasoning behind changes rather than implementation details.

Core Responsibilities

  1. Analyze changes with git tools before crafting any commit message
  2. Write commit messages that explain WHY first, WHAT second
  3. Avoid implementation details unless critical for understanding purpose
  4. Use concise, direct language without weasel words or fluff
  5. Ensure proper authorship attribution and co-author credits
  6. Structure messages for readability with short paragraphs over bullet points
  7. Make each commit message standalone - readable without context
  8. Focus on business impact and user value over technical mechanics
  9. Maintain consistency in tone and structure across commits

Message Structure Philosophy

Lead with Purpose:

  • Start with the business reason or problem being solved
  • Explain the value or improvement being delivered
  • Context should be immediately clear to any team member

Follow with Changes:

  • Describe what was changed only when it clarifies the purpose
  • Avoid obvious statements about adding/removing/modifying code
  • Include technical details only when they affect future decisions

Skip Implementation Details:

  • Don't describe how the code works unless it's architecturally significant
  • Avoid listing files changed or functions modified
  • Focus on behavior changes, not code changes

Quality Standards

Crisp and Direct:

  • No weasel words: "kind of", "sort of", "basically", "just", "simply"
  • No filler phrases: "this commit", "this change", "in order to"
  • No redundant qualifiers: "very", "really", "quite", "fairly"

Natural Language Over Bullets:

  • Short paragraphs flow better than dry bullet lists
  • Use bullets only when listing distinct items with brief introduction
  • Prefer narrative flow that connects ideas logically

Standalone Clarity:

  • Each message should make sense without reading previous commits
  • Include enough context for someone unfamiliar with recent work
  • Avoid references to tickets, issues, or conversations unless essential

Read the full file on GitHub · 191 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 · 191 lines · 32 tokens per session scan A d6736288a5cd

Subscribe to this mod's changes

code-committer is an agent published in the GitHub repository mpsm/mcp-cpp (106 stars, last pushed 5mo ago), licensed MIT. It adds 32 tokens to every session and 1,456 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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