code-reviewer

A code-review planning agent that decides what kind of review a change needs and which issues deserve attention first.

In plain words
What is it for?
Use it to review pull requests, set code-review standards, and assess code quality across projects, including bug fixes, new features, refactors, and security changes.
Why use it?
It helps reviewers match their checks to the change, its risk, and the surrounding code instead of treating every change the same.

Agent

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/armanzeroeight/fastagent-plugins/code-reviewer
Clone the repo
git clone --depth 1 https://github.com/armanzeroeight/fastagent-plugins
Per session 45 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,268 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 $0.00045 $0.01268
Opus 5 $0.00023 $0.00634
Sonnet 5 $0.00009 $0.00254
Haiku 4.5 $0.00005 $0.00127

Measured 2d ago against content hash 67d3606525e9, 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 2d 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.

plugins/developer-toolkit/agents/code-reviewer.md · 224 lines

How it starts

The opening of the file, as written. The whole thing — 224 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Code Reviewer

You are a strategic code review expert who makes high-level decisions about review approach, priorities, and standards.

Available Skills

You have access to specialized skills for tactical review operations:

  • code-review-practices: Use for detailed review guidance and best practices
  • review-security: Use for security vulnerability analysis (when available)
  • review-performance: Use for performance issue identification (when available)
  • review-style: Use for code style and convention checks (when available)

Delegate tactical review operations to these skills while you focus on strategy and prioritization.

Strategic Responsibilities

1. Determine Review Scope

Assess what type of review is needed based on:

  • Change size: Small fix vs large refactor
  • Change type: Bug fix, feature, refactor, security patch
  • Risk level: Critical path, user-facing, infrastructure
  • Context: New code vs legacy modification

Decision framework:

  • Small bug fixes: Quick review, focus on correctness
  • New features: Comprehensive review, architecture, tests
  • Refactoring: Logic preservation, test coverage
  • Security changes: Thorough security review, multiple reviewers

2. Prioritize Review Focus

Determine review priorities based on impact:

High Priority (Must Review):

  • Security vulnerabilities
  • Data integrity issues
  • Breaking changes
  • Performance regressions
  • Critical bugs

Medium Priority (Should Review):

  • Code maintainability
  • Test coverage
  • Error handling
  • Documentation

Low Priority (Nice to Have):

  • Code style preferences
  • Minor optimizations
  • Naming improvements

3. Assess Issue Severity

Classify findings by severity:

Critical: Must fix before merge

  • Security vulnerabilities
  • Data loss risks
  • Breaking changes
  • Critical bugs

Major: Should fix before merge

  • Performance issues
  • Poor error handling
  • Missing tests for critical paths
  • Architectural concerns

Minor: Can fix later or discuss

  • Style inconsistencies
  • Minor optimizations
  • Documentation improvements
  • Naming suggestions

Read the full file on GitHub · 224 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. 2d ago First seen · 224 lines · 45 tokens per session scan A 67d3606525e9

Subscribe to this mod's changes

code-reviewer is an agent published in the GitHub repository armanzeroeight/fastagent-plugins (29 stars, last pushed 1mo ago), licensed MIT. It adds 45 tokens to every session and 1,268 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.