review-diff

review-diff is a command for Claude Code from ruvnet/metaharness. It costs 13 tokens per session (77 once invoked), scanned A, a copy of review-diff, MIT.

A command that examines the changes currently shown by Git, the version-control system used to track code changes. It reports likely bugs and security problems, then recommends approval or more changes.

In plain words
What is it for?
Use it before committing or opening a pull request. It reports high-confidence findings with file and line details, separates bugs from minor comments, and ends with a clear decision.
Why use it?
It gives a focused review of the code you changed without burying important problems among guesses or minor style comments.

Command for Claude Code

Written for Claude Code: installed under .claude/.

Part of the kimi-k3-harness plugin — 2 skills, 2 commands shipped together

Good fit Use it before committing or opening a pull request. It reports high-confidence findings with file and line details, separates bugs from minor comments, and ends with a clear decision.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/ruvnet/metaharness/review-diff
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.

Clone the repo
git clone --depth 1 https://github.com/ruvnet/metaharness

Made for: Claude Code.

Or install kimi-k3-harness, the plugin that ships this one along with the rest of its 2 skills, 2 commands.

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-diff

README.md
[![agentmods](https://agentmods.dev/badge/commands/ruvnet/metaharness/review-diff/github.svg)](https://agentmods.dev/commands/ruvnet/metaharness/review-diff)
Your own site
<a href="https://agentmods.dev/commands/ruvnet/metaharness/review-diff"><img src="https://agentmods.dev/badge/commands/ruvnet/metaharness/review-diff/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-diff

Your own site · 80×15
<a href="https://agentmods.dev/commands/ruvnet/metaharness/review-diff"><img src="https://agentmods.dev/badge/commands/ruvnet/metaharness/review-diff.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 13 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 77 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.
Origin 100% copy Near-identical to another mod 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 $0.00013 $0.00077
Opus 5.5 $0.00005 $0.00031
Sonnet 5.5 $0.00003 $0.00015
Haiku 4.5 $0.00001 $0.00008

Measured 1mo ago against content hash 2ab52f01487b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

review-diff 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 1mo 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.

Origin

This is a copy

100% identical to review-diff — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

kimi-k3-harness/.claude/commands/review-diff.md · 11 lines

What it actually says

Review the current git diff.

  1. git diff to read the change.
  2. Report only high-confidence findings as file:line — issue — fix.
  3. Separate bugs from nits.
  4. End with APPROVE or REQUEST-CHANGES and a one-line reason.
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. 1mo ago First seen · 11 lines · 13 tokens per session scan A 2ab52f01487b

Subscribe to this mod's changes

review-diff is a command published in the GitHub repository ruvnet/metaharness (709 stars, last pushed today), licensed MIT. It adds 13 tokens to every session and 77 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to review-diff, differing in 0 lines, and is treated as a copy.