code-reviewer

code-reviewer is a skill for Claude Code from nguyenthienthanh/aura-frog. It costs 105 tokens per session (1,602 once invoked), scanned A, original, MIT.

A structured code-review guide that checks six areas: security, architecture, error handling, missing tests, type safety, and unnecessary complexity.

In plain words
What is it for?
Use it to review code, pull requests, or pre-merge changes and receive findings with severity, file locations, suggested fixes, and an approval decision.
Why use it?
It provides a consistent way to find risks and decide whether code is ready to merge.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Part of the aura-frog plugin — 43 skills, 24 commands, 15 agents, 10 hooks, 6 MCP servers shipped together

Good fit Use it to review code, pull requests, or pre-merge changes and receive findings with severity, file locations, suggested fixes, and an approval decision.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/nguyenthienthanh/aura-frog/code-reviewer
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.

Any agent
npx skills add nguyenthienthanh/aura-frog --skill code-reviewer
Clone the repo
git clone --depth 1 https://github.com/nguyenthienthanh/aura-frog

Made for: Claude Code.

Or install aura-frog, the plugin that ships this one along with the rest of its 43 skills, 24 commands, 15 agents, 10 hooks, 6 MCP servers.

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 code-reviewer

README.md
[![agentmods](https://agentmods.dev/badge/skills/nguyenthienthanh/aura-frog/code-reviewer/github.svg)](https://agentmods.dev/skills/nguyenthienthanh/aura-frog/code-reviewer)
Your own site
<a href="https://agentmods.dev/skills/nguyenthienthanh/aura-frog/code-reviewer"><img src="https://agentmods.dev/badge/skills/nguyenthienthanh/aura-frog/code-reviewer/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 code-reviewer

Your own site · 80×15
<a href="https://agentmods.dev/skills/nguyenthienthanh/aura-frog/code-reviewer"><img src="https://agentmods.dev/badge/skills/nguyenthienthanh/aura-frog/code-reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 105 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,602 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. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Agent Snooping · line 67
    Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.
    Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
How audits are shown
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 $0.00105 $0.01602
Opus 5.5 $0.00042 $0.00641
Sonnet 5.5 $0.00021 $0.00320
Haiku 4.5 $0.00011 $0.00160

Measured 1mo ago against content hash 4fda6447e178, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 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.

aura-frog/skills/code-reviewer/SKILL.md · 116 lines

How it starts

The opening of the file, as written. The whole thing — 116 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AI-consumed reference. Optimized for Claude to read during execution. Sources and quotes for every standard below: references/standards.md.

Code Reviewer

Runs in: TDD Phase 4 (reviewer ≠ Phase 3 builder), /check review [path|PR], /run review <target>, or on request.

Bar

Approve when the change definitely improves code health, even if not perfect. Technical facts beat opinions; the project's style guide and linters settle style — don't repeat them.

Process

  1. Scope: git diff --name-only <base>...HEAD (or the given path/PR). Read diff hunks + immediate callers/callees, not whole files.
  2. Size check: >400 changed lines → review in file groups and state which groups were covered. Never claim full coverage you didn't do.
  3. Read every changed line. Run the 8 aspects, CRITICAL-priority ones first.
  4. Verify each candidate finding (below), drop the unproven, report.

8 Aspects

aspects[8]{aspect,priority,checks}:
  Security,CRITICAL,"OWASP Top 10:2025 (list below) · CWE Top 25 · secrets · untrusted input reaching queries/shell/HTML/paths · authz on every protected action"
  Correctness,CRITICAL,"Does it do what the task intends? Off-by-one, null/empty/boundary input, wrong operator/condition, races and shared state, time zones, partial failure leaving bad state"
  Compatibility,CRITICAL,"No breaking change: public API/CLI/config/schema/file format/defaults/output shape unchanged unless versioned; observable behavior others rely on (Hyrum's law); migration or deprecation path"
  Architecture,HIGH,"Right layer, SRP, coupling, fits existing patterns; reuse over new helper"
  Error Handling,HIGH,"Swallowed errors, empty catch, fail-open on exceptions (OWASP A10), missing cleanup, errors that leak secrets/internals"
  Test Gaps,HIGH,"Changed behavior without a test; missing edge/failure-path test; tests that can't fail"
  Type Safety,MEDIUM,"any/unchecked casts, unhandled null, unvalidated external data"
  Simplicity,MEDIUM,"Over-engineering, speculative code, dead code, unnecessary comments (rules below)"

Read the full file on GitHub · 116 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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 Changed · +31 lines · +41 tokens per session 4fda6447e178
  2. 1mo ago First seen · 85 lines · 64 tokens per session scan A be179bc53309

Subscribe to this mod's changes

code-reviewer is a skill published in the GitHub repository nguyenthienthanh/aura-frog (25 stars, last pushed 3d ago), licensed MIT. It adds 105 tokens to every session and 1,602 once invoked, about $0.0004 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 2026-08-30.

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