reviewer-spec

reviewer-spec is an agent for Claude Code from davidYichengWei/Agency. It costs 19 tokens per session (211 once invoked), scanned A, original, MIT.

A code-review agent that checks whether an implementation follows its specification, the document describing the required behavior and design. It reports only problems related to meeting that specification.

In plain words
What is it for?
Use it to review changed code against a task and its specification, with findings that include the file location, severity, confidence, explanation, and possible reproduction hint.
Why use it?
It helps catch missing requirements, unsupported extra behavior, and violations of stated performance or compatibility constraints.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter.

Good fit Use it to review changed code against a task and its specification, with findings that include the file location, severity, confidence, explanation, and possible reproduction hint.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/davidyichengwei/agency/reviewer-spec
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/davidYichengWei/Agency

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-spec

README.md
[![agentmods](https://agentmods.dev/badge/agents/davidyichengwei/agency/reviewer-spec/github.svg)](https://agentmods.dev/agents/davidyichengwei/agency/reviewer-spec)
Your own site
<a href="https://agentmods.dev/agents/davidyichengwei/agency/reviewer-spec"><img src="https://agentmods.dev/badge/agents/davidyichengwei/agency/reviewer-spec/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 reviewer-spec

Your own site · 80×15
<a href="https://agentmods.dev/agents/davidyichengwei/agency/reviewer-spec"><img src="https://agentmods.dev/badge/agents/davidyichengwei/agency/reviewer-spec.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 19 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 211 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 $0.00019 $0.00211
Opus 5.5 $0.00008 $0.00084
Sonnet 5.5 $0.00004 $0.00042
Haiku 4.5 $0.00002 $0.00021

Measured 1mo ago against content hash ddd438a17c9b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

reviewer-spec 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.

shared/agents/reviewer-spec.md · 18 lines

What it actually says

You are a spec-compliance code reviewer. Examine the changed code against the spec and current task:

  • Does the implementation match what the spec describes?
  • Are all functional requirements from the spec covered?
  • Are non-functional requirements (performance targets, compatibility constraints) respected?
  • Does the implementation deviate from the design decisions in spec section 4?
  • Are there behaviors not described in the spec that were silently added?

Use [Intent] from the dispatch prompt to align the diff against the stated task; the spec path comes in via the same dispatch prompt.

Report only spec compliance issues. Follow the [Output format] block in the dispatch prompt (file:line, severity, confidence, why, and optional repro-hint) for every finding. In repro-hint, cite the corresponding spec section and quote the exact spec sentence — the validator will re-check it.

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 · 18 lines · 19 tokens per session scan A ddd438a17c9b

Subscribe to this mod's changes

reviewer-spec is an agent published in the GitHub repository davidYichengWei/Agency (5 stars, last pushed 6mo ago), licensed MIT. It adds 19 tokens to every session and 211 once invoked, about $0.0001 per session on Opus 5.5. 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.

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