vale-ai-tells: Skill for Claude Code

.claude/skills/review-commit-message/SKILL.md

review-commit-message is a skill for Claude Code from tbhb/vale-ai-tells. It costs 83 tokens per session (1,286 once invoked), scanned A, original, MIT.

An independent reviewer for a drafted commit message in COMMIT_AGENTMSG, compared with the changes staged for a Git commit.

In plain words
What is it for?
Use it to check whether a commit message accurately describes one logical staged change and follows the project's writing rules.
Why use it?
It catches unsupported claims, incorrect counts, unnecessary wording, poor subject style, and changes that combine unrelated work before the commit is made.

Skill for Claude Code

Written for Claude Code: background in frontmatter. Also seen: agent in frontmatter.

This is tbhb/vale-ai-tells's own configuration. It tells Claude Code how to work on vale-ai-tells itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything vale-ai-tells configures →

Reuse

Borrowing it

Nothing to install: this file belongs to tbhb/vale-ai-tells. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/tbhb/vale-ai-tells/main/.claude/skills/review-commit-message/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/tbhb/vale-ai-tells

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for review-commit-message

README.md
[![agentmods](https://agentmods.dev/badge/skills/tbhb/vale-ai-tells/review-commit-message/github.svg)](https://agentmods.dev/skills/tbhb/vale-ai-tells/review-commit-message)
Your own site
<a href="https://agentmods.dev/skills/tbhb/vale-ai-tells/review-commit-message"><img src="https://agentmods.dev/badge/skills/tbhb/vale-ai-tells/review-commit-message/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for review-commit-message

Your own site · 80×15
<a href="https://agentmods.dev/skills/tbhb/vale-ai-tells/review-commit-message"><img src="https://agentmods.dev/badge/skills/tbhb/vale-ai-tells/review-commit-message.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 83 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,286 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 5.1 $0.00083 $0.01286
Opus 5 $0.00042 $0.00643
Sonnet 5 $0.00017 $0.00257
Haiku 4.5 $0.00008 $0.00129

Measured 9d ago against content hash 1e1d03a5fde6, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

review-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 9d 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/skills/review-commit-message/SKILL.md · 110 lines

How it starts

The opening of the file, as written. The whole thing — 110 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Review a drafted commit message

Review a drafted commit message against its staged diff and return a verdict. You're the independent check. You didn't write this message and you didn't watch the work happen, so read what the message claims rather than what its author meant to claim.

The repository

$ARGUMENTS

Treat the first word as the repository under review. An empty value means the current working directory. Bind it once and use it throughout:

REPO="${ARGUMENTS:-$(pwd)}"

A second word of --amend says this commit replaces the one at HEAD instead of following it. That changes which diff you read, and nothing else about your job.

Gather the inputs

Run these before judging anything:

  • cat "$REPO/COMMIT_AGENTMSG" for the draft
  • git -C "$REPO" diff --cached --name-status for the staged paths
  • git -C "$REPO" diff --cached for the staged diff
  • git -C "$REPO" log -5 --pretty=format:'%h %s' for project style

Where the caller passed --amend, swap the two staged-diff commands for these:

  • git -C "$REPO" diff --cached --name-status HEAD~1
  • git -C "$REPO" diff --cached HEAD~1

Those show the amended commit's full contents, meaning the existing commit plus whatever the author has staged since. Reading the plain staged diff during an amend shows the delta alone, so a message describing the whole commit looks like it claims things the diff never supported. That mistake produces confident, wrong findings.

A missing or empty draft, or an empty staged diff, is itself a finding. Report it and stop.

What to check

Work these four groups. Every finding names the exact offending text and the fix.

Truthfulness

The message describes this diff and no other.

  • Flag any claim the staged diff doesn't support. A message that mentions a file, function, flag, or behavior absent from the diff is wrong, whatever else it gets right.
  • Flag counts of any kind: files, lines, tests, functions, commits, percentages. A count goes stale as soon as other work merges, and it pads a message rather than informing it.
  • Flag results nobody verified: benchmark figures, fixes the flake, no longer leaks, claims about what CI does.

Read the full file on GitHub · 110 lines

Files

What ships with it

1 file 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. 9d ago First seen · 110 lines · 83 tokens per session scan A 1e1d03a5fde6

Subscribe to this mod's changes

review-commit-message is a skill published in the GitHub repository tbhb/vale-ai-tells (87 stars, last pushed today), licensed MIT. It adds 83 tokens to every session and 1,286 once invoked, about $0.0004 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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