mach12:pr-review

mach12:pr-review is a command for Claude Code from LeanAndMean/scramjet. It costs 16 tokens per session (2,429 once invoked), scanned A, original, Apache-2.0.

A command that reviews a GitHub pull request using focused checks such as tests, errors, types, code quality, simplicity, and completeness, then posts structured findings as a comment.

In plain words
What is it for?
Use it to review changed code, optionally focusing on selected areas such as test coverage or error handling, and report the findings.
Why use it?
It brings several review concerns together and records the results directly on the pull request for the team to discuss.

Command for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: mentions subagents.

Good fit Use it to review changed code, optionally focusing on selected areas such as test coverage or error handling, and report the findings.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/leanandmean/scramjet/mach12-pr-review
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/LeanAndMean/scramjet

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 mach12:pr-review

README.md
[![agentmods](https://agentmods.dev/badge/commands/leanandmean/scramjet/mach12-pr-review/github.svg)](https://agentmods.dev/commands/leanandmean/scramjet/mach12-pr-review)
Your own site
<a href="https://agentmods.dev/commands/leanandmean/scramjet/mach12-pr-review"><img src="https://agentmods.dev/badge/commands/leanandmean/scramjet/mach12-pr-review/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 mach12:pr-review

Your own site · 80×15
<a href="https://agentmods.dev/commands/leanandmean/scramjet/mach12-pr-review"><img src="https://agentmods.dev/badge/commands/leanandmean/scramjet/mach12-pr-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 16 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,429 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 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 $0.00016 $0.02429
Opus 5 $0.00008 $0.01215
Sonnet 5 $0.00003 $0.00486
Haiku 4.5 $0.00002 $0.00243

Measured 4d ago against content hash 0fe07b0c23a6, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

mach12:pr-review 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 4d 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.

packages/scramjet/mach12/commands/mach12:pr-review.md · 129 lines

How it starts

The opening of the file, as written. The whole thing — 129 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Review PR

Goals

  • Produce a comprehensive, evidence-grounded review of every relevant command and runtime surface without modifying the pull request.
  • Publish one verified structured review whose actionable findings, strengths, scope, and stable identifiers are consumable by independent assessment.
  • Hand the exact review artifact to the forced assessment step so no finding is treated as fix authority before independent classification.

Step 1: Parse input

The user's input typically contains:

  • A PR number (required)
  • Optional review aspects: comments, tests, errors, types, code, simplify, completeness, or all
  • Additional context, focus areas, or constraints (optional)

Example inputs:

  • 108
  • 108 error handling and test coverage
  • 108 focus on the new API endpoints
  • 108 tests errors
  • 108 all

Extract the PR number. If recognized review aspects were provided, note them as review focus in Step 3. Treat any remaining text as user context. If the input is ambiguous, ask the user to clarify.

Step 2: Check out PR branch

Ensure you are on the correct branch:

gh pr checkout <pr-number>
git pull

Step 3: Run the review

Determine the changed files and PR context before launching reviewers:

git diff --name-only origin/main...HEAD
gh pr view <pr-number> --json title,body,createdAt,updatedAt,comments,files

Collect current CI/check evidence. Identify project-provided tools relevant to the changed artifacts from repository guidance, manifests, adjacent scripts, CI configuration, and established usage; establish each tool's authority; classify its relevance as required verification, advisory analysis, or irrelevant, and its execution effect as non-mutating or mutating generation/formatting. When current CI evidence is unavailable or insufficient, safely run applicable non-mutating checks. Inspect unfamiliar scripts before use; do not install missing tools or run mutating modes without authorization. Record exact commands, outputs, and limitations. Treat failures as evidence rather than automatic root causes, warnings as bounded diagnostics rather than expanded review scope, and clean output as insufficient behavioral proof.

Read the full file on GitHub · 129 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. 4d ago Changed · +1 lines · -1 tokens per session 0fe07b0c23a6
  2. 9d ago First seen · 128 lines · 17 tokens per session scan A ebec7c4a03bc

Subscribe to this mod's changes

mach12:pr-review is a command published in the GitHub repository LeanAndMean/scramjet (6 stars, last pushed today), licensed Apache-2.0. It adds 16 tokens to every session and 2,429 once invoked, about $0.0001 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.