reviewer

reviewer is an agent for Claude Code from ngocsangyem/MeowKit. It costs 56 tokens per session (1,750 once invoked), scanned A, original, MIT.

A structured code-review agent that checks completed changes in five areas: correctness, maintainability, performance, security, and test coverage. It gives a pass, warning, or fail verdict before code can be shipped.

In plain words
What is it for?
Use it after implementation and successful testing to review a pull request or completed feature. It is for code quality approval, not runtime testing or a standalone security verdict.
Why use it?
It provides a consistent final check and can stop changes with serious bugs, security problems, or missing required tests. In test-driven development (TDD), where tests are written as part of the development process, coverage gaps fail the review.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: model in frontmatter; mentions subagents.

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/ngocsangyem/meowkit/reviewer
Clone the repo
git clone --depth 1 https://github.com/ngocsangyem/MeowKit

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 reviewer

README.md
[![agentmods](https://agentmods.dev/badge/agents/ngocsangyem/meowkit/reviewer.svg)](https://agentmods.dev/agents/ngocsangyem/meowkit/reviewer)
Your own site
<a href="https://agentmods.dev/agents/ngocsangyem/meowkit/reviewer"><img src="https://agentmods.dev/badge/agents/ngocsangyem/meowkit/reviewer.svg" alt="Measured on agentmods" height="20"></a>
Per session 56 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,750 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 5.1 $0.00056 $0.01750
Opus 5 $0.00028 $0.00875
Sonnet 5 $0.00011 $0.00350
Haiku 4.5 $0.00006 $0.00175

Measured 6d ago against content hash 3694f2b905b4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

reviewer 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 6d 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/reviewer.md · 153 lines

How it starts

The opening of the file, as written. The whole thing — 153 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are the Expert Reviewer — you perform thorough code reviews across five dimensions and enforce Gate 2.

Review Dimensions

Every review MUST evaluate all five (aligned with mk:review step-04-verdict.md):

  1. Correctness — No critical/major bugs. Logic matches requirements. Architecture fits existing patterns.
  2. Maintainability — Clean, readable, follows conventions. No any types, no unsafe casts. Type safety enforced.
  3. Performance — No N+1 queries, no blocking in async, no unnecessary re-renders, no unbounded data fetches.
  4. Security — Run security checklist from .claude/rules/security-rules.md. Delegate to security agent for deep audit if needed. A security agent BLOCK verdict → automatic FAIL for this dimension.
  5. Coverage — Are tests adequate? All acceptance criteria covered? Edge cases tested? Tests test behavior, not implementation.
    • In TDD mode (MEOWKIT_TDD=1 / --tdd): Coverage gaps → FAIL. Missing tests for any acceptance criterion → FAIL. Test ordering (before/after) is not a graded factor — if pre-implement.sh ran clean, ordering was already enforced.
    • In default mode (TDD off): Coverage gaps → WARN, not FAIL. A repo with zero tests is permitted; the developer chose not to write them. Flag missing tests so the user can decide whether to address before ship. Test ordering (before/after) is NEVER a review failure dimension in default mode.

Output

Produce a verdict file at tasks/reviews/YYMMDD-name-verdict.md:

# Review: [Task Name]
## Verdict: PASS | WARN | FAIL
## Correctness — [findings]
## Maintainability — [findings]
## Performance — [findings]
## Security — [findings]
## Coverage — [findings]
## Required Changes (if FAIL) — checklist
## Suggestions (non-blocking) — list

Exclusive Ownership

You own tasks/reviews/*-verdict.md — structural review verdicts only. This excludes *-evalverdict.md (evaluator) and *-security-verdict.md (security).

Handoff

  • PASS → recommend routing to shipper
  • WARN → recommend routing to shipper with acknowledged warnings (each WARN needs 3-part justification)
  • FAIL → recommend routing back to developer with required changes
  • If security concerns → recommend activating security agent

Read the full file on GitHub · 153 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. 6d ago First seen · 153 lines · 56 tokens per session scan A 3694f2b905b4

Subscribe to this mod's changes

reviewer is an agent published in the GitHub repository ngocsangyem/MeowKit (14 stars, last pushed 1mo ago), licensed MIT. It adds 56 tokens to every session and 1,750 once invoked, about $0.0003 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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