reviewer-claude

reviewer-claude is an agent for Claude Code from heurema/signum. It costs 44 tokens per session (944 once invoked), scanned A, original, MIT.

A read-only code reviewer that compares a code change with its written requirements and checks for bugs, security problems, logic errors, and missed requirements.

In plain words
What is it for?
Use it to inspect a generated code diff, deterministic check results, and the project contract during a Signum audit.
Why use it?
It gives a separate review of the change without altering the code, helping catch problems before the change is accepted.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter.

Part of the signum plugin — 8 skills, 8 commands, 5 agents shipped together

Good fit Use it to inspect a generated code diff, deterministic check results, and the project contract during a Signum audit.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/heurema/signum/reviewer-claude
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/heurema/signum

Made for: Claude Code.

Or install signum, the plugin that ships this one along with the rest of its 8 skills, 8 commands, 5 agents.

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-claude

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

Your own site · 80×15
<a href="https://agentmods.dev/agents/heurema/signum/reviewer-claude"><img src="https://agentmods.dev/badge/agents/heurema/signum/reviewer-claude.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 44 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 944 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 $0.00044 $0.00944
Opus 5 $0.00022 $0.00472
Sonnet 5 $0.00009 $0.00189
Haiku 4.5 $0.00004 $0.00094

Measured 10d ago against content hash 7ffe8e0e6bf9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

reviewer-claude 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 10d 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.

agents/reviewer-claude.md · 85 lines

How it starts

The opening of the file, as written. The whole thing — 85 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are the Claude reviewer in Signum v4.18's multi-model audit panel.

Input

The active contract artifact root is .signum/contracts/<contractId>/. Root .signum/ paths may exist as compatibility views during migration, but the canonical review inputs live under the contract directory.

Read these files:

  • .signum/contracts/<contractId>/contract.json -- the contract specification
  • .signum/contracts/<contractId>/combined.patch -- the generated diff
  • .signum/contracts/<contractId>/mechanic_report.json -- deterministic check results
  • .signum/contracts/<contractId>/iteration_delta.patch -- iteration delta (what changed in this fix, only present in iterative passes 2+)

Task

Review the diff against the contract for bugs, security issues, logic errors, and contract compliance.

Read these inputs directly (do NOT look for a review template file):

  • {contract_json} = contents of .signum/contracts/<contractId>/contract.json
  • {diff} = contents of .signum/contracts/<contractId>/combined.patch
  • {mechanic_report} = contents of .signum/contracts/<contractId>/mechanic_report.json
  • {iteration_delta} = contents of .signum/contracts/<contractId>/iteration_delta.patch if it exists, otherwise empty string
  • {review_context} = review context JSON passed inline by the orchestrator (git history, issue refs)

When iteration_delta.patch exists, focus your review on the delta — these are the changes made to fix previous findings. Report only defects introduced by, exposed by, or insufficiently fixed by the delta. Cite delta lines as primary evidence. Use the full patch for context only.

Output

Write your review result to .signum/contracts/<contractId>/reviews/claude.json as a JSON object with this structure:

{
  "verdict": "APPROVE | APPROVE_WITH_CONCERNS | CONDITIONAL | REJECT",
  "findings": [
    {
      "severity": "CRITICAL | MAJOR | MINOR",
      "category": "bug | security | logic | quality | performance",
      "file": "path/to/file",
      "line": 0,
      "comment": "description of the issue",
      "evidence": "code snippet or reasoning",
      "fingerprint": "lowercase normalized summary for dedup"
    }
  ],
  "concerns": [
    {
      "severity": "MAJOR | MINOR",
      "category": "bug | security | logic | quality | performance",
      "description": "documented issue that is acceptable for now",
      "recommendation": "suggested follow-up action",
      "fingerprint": "lowercase normalized summary for dedup"
    }
  ],
  "summary": "1-2 sentence overall assessment"
}

Read the full file on GitHub · 85 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. 10d ago First seen · 85 lines · 44 tokens per session scan A 7ffe8e0e6bf9

Subscribe to this mod's changes

reviewer-claude is an agent published in the GitHub repository heurema/signum (18 stars, last pushed 1mo ago), licensed MIT. It adds 44 tokens to every session and 944 once invoked, about $0.0002 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.

Related

Other agents, from other repositories

reflection-judge

Post-processes reflect candidates — validates that cross-session evidence citations actually exist in S-NNN-REPORT.md before proposals or micro-approvals are queued. Returns ACCEPT | DOWNGRADE: | SUPPRESS per observation.

gtapps/claude-code-hermit · 50 tokens

symfony-security-auditor

Read-only security audit of Symfony authentication and authorization: firewalls, accesscontrol, voters, API Platform security, rate limiting, CSRF, password hashing, and input validation. Use proactively after changes to security.yaml, voters, controllers, forms, or API resources.

dev-toolings/superpowers-symfony · 60 tokens

code-simplifier

Simplifies and refines code for clarity, consistency, and maintainability while preserving all functionality. Applies safe local simplifications (local renames, dead code, unnecessary nesting) directly and proposes structural changes for approval. Focuses on recently modified code unless instructed otherwise; not for…

oprogramadorreal/optimus-claude · 66 tokens

code-formatter

Expert code formatter and linter specialist. Automatically formats code, applies consistent styling, fixes lint errors, and enforces coding standards across multiple languages. Use PROACTIVELY when code needs formatting, lint fixes, or style consistency improvements.

wigtn/wigtn-plugins · 51 tokens

ccf-spec-checker

Fresh-context reviewer that checks an implementation against the CCF spec — conformance, conventions, SOLID/OOP, spec drift, BE↔FE consistency. Read-only, returns findings with file:line, does NOT fix code. Invoked by /ccf:check, never for coding.

naniiluja/ccf · 66 tokens

reviewer

The Reviewer of the aSPARK team. Use in the Review phase (/peer-review) to audit the diff produced by /increment with a staff-engineer eye: plan conformance, correctness, edge cases, error handling, security and test quality. Writes the review report and may fix obvious low-risk issues directly.

a-lottes/aSPARK · 66 tokens