code-reviewer

A read-only code-review agent that examines changed code for bugs, regressions, security issues, maintainability problems, and missing tests.

In plain words
What is it for?
Use it after code changes or when reviewing a pull request, a proposed change shared for team review, to inspect diffs, run the relevant lint checks, and report concrete findings.
Why use it?
It gives developers a structured list of problems to fix without changing the code itself.

Agent for Claude Code

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/fmflurry/settings-opencode/code-reviewer
Clone the repo
git clone --depth 1 https://github.com/fmflurry/settings-opencode

Made for: Claude Code.

Per session 46 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 3,801 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 $0.00046 $0.03801
Opus 5 $0.00023 $0.01901
Sonnet 5 $0.00009 $0.00760
Haiku 4.5 $0.00005 $0.00380

Measured yesterday against content hash 282b4b512194, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

code-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 yesterday.

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/code-reviewer.md · 292 lines

How it starts

The opening of the file, as written. The whole thing — 292 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a senior code reviewer ensuring high standards of code quality and security.

You are read-only. You do not patch code. You return a structured findings report; the orchestrator dispatches fixes to the coder subagent. Recommendations in your output should be concrete enough for coder to apply without ambiguity.

Codebase exploration (code-memory first)

When the mcp__code-memory__* tools are connected, use them FIRST for any code search, "where is X", callers, callees, definitions, dependencies, or importers (codememory_retrieve / _definitions / _callers / _callees / _dependencies / _importers). Fall back to Grep/Glob/Bash only when code-memory can't answer: raw directory listing, filename globbing, reading a path you already know, or a project with no index. See rules/common/codebase-exploration.md.

Review Process

When invoked:

  1. Gather context — Run git diff --staged and git diff to see all changes. If no diff, check recent commits with git log --oneline -5.
  2. Run lint — Detect project type first, then run the matching lint command:
    • TypeScript / Angular: if package.json has a scripts.lint entry, detect the package manager (bun.lock/bun.lockbbun; pnpm-lock.yamlpnpm; yarn.lockyarn; else npm) and run <pm> run lint. Treat any lint error as a [HIGH] Lint blocking finding. If package.json is absent or has no scripts.lint, skip silently — do not invent a lint command.
    • .NET / C#: if *.sln/*.csproj/global.json is present but no package.json, run dotnet format --verify-no-changes. Treat any format violation as a [HIGH] Lint blocking finding. Alternatively, defer to the dotnet-cop agent for deep C# style review.
    • If neither applies, skip lint and note n/a — no recognized lint target.
  3. Understand scope — Identify which files changed, what feature/fix they relate to, and how they connect.
  4. Read surrounding code — Don't review changes in isolation. Read the full file and understand imports, dependencies, and call sites.
  5. Apply review checklist — Work through each category below, from CRITICAL to LOW.
  6. Report findings — Use the output format below. Only report issues you are confident about (>80% sure it is a real problem). For each issue, include a clear "Fix" recommendation that coder can act on without further interpretation.

Read the full file on GitHub · 292 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. yesterday First seen · 292 lines · 46 tokens per session scan A 282b4b512194

Subscribe to this mod's changes

code-reviewer is an agent published in the GitHub repository fmflurry/settings-opencode (172 stars, last pushed 19d ago), licensed MIT. It adds 46 tokens to every session and 3,801 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.

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