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code-review

code-review is a skill for Claude Code from guyoung/boxagnts. It costs 24 tokens per session (2,134 once invoked), scanned A, original, MIT.

Read-only guidance for examining changed source files across logic, security, performance, maintainability, and coding standards. A code review is a systematic check for problems before changes are accepted.

In plain words
What is it for?
Reviewing staged changes by default and writing a structured report that identifies issues and suggests concrete fixes.
Why use it?
It produces a consistent review with actionable suggestions while preventing the reviewer from modifying the code.

Skill for Claude Code

Written for Claude Code: when-to-use in frontmatter.

not rated 11repo 3mo ago A scan 24 tokens original MIT

Good fit Reviewing staged changes by default and writing a structured report that identifies issues and suggests concrete fixes.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/guyoung/boxagnts/code-review
View source ↗ guyoung/boxagnts
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 guyoung/boxagnts --skill code-review
Clone the repo
git clone --depth 1 https://github.com/guyoung/boxagnts

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 code-review

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/guyoung/boxagnts/code-review"><img src="https://agentmods.dev/badge/skills/guyoung/boxagnts/code-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 24 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,134 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 $0.00024 $0.02134
Opus 5.5 $0.00010 $0.00854
Sonnet 5.5 $0.00005 $0.00427
Haiku 4.5 $0.00002 $0.00213

Measured 2mo ago against content hash 50bc97aff1ef, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

code-review 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 2mo 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.

app/extensions/skills/code-review/SKILL.md · 185 lines

How it starts

The opening of the file, as written. The whole thing — 185 lines — stays where its author put it; the contents beside it link to each section on GitHub.

GUIDANCE SKILL — INSTRUCTIONS ONLY Code review is a systematic examination of source code quality across multiple dimensions: logic, security, performance, maintainability, and standards compliance. This skill provides patterns, conventions, and constraints. It contains no executable code — apply the guidance to your context, adapting specifics as needed per C2-B.

CRITICAL: Guidance Principles

The instructions below define the REQUIRED APPROACH — you MUST follow the prescribed patterns, conventions, and constraints.

Mandatory adherence:

  • Follow all stated conventions and naming patterns
  • Respect all constraints and boundaries
  • Apply the recommended patterns to your implementation
  • Do NOT deviate from prescribed architectural decisions
  • Never modify any code; the review is strictly read-only
  • Every issue reported MUST include a concrete, actionable fix suggestion

Correct Application Pattern

  1. Read and absorb all guidance sections below
  2. Map the prescribed patterns to your current context
  3. Implement following the stated conventions — adapt specifics to fit, but preserve the intent
  4. Validate against the C3 checklist at the end

Argument Details

Arg Type Required Default Description
target string No (empty) File or directory to review; leave empty to review git staged changes

Design Patterns & Conventions

Architectural Pattern

Multi-dimensional assessment: every review MUST examine the target code through all five review dimensions — Logic Correctness, Security, Performance, Maintainability, and Standards Compliance. Issues from each dimension are independently classified and then merged into a single ranked report.

Naming Conventions

Issues are classified by severity using four standard levels:

Severity Meaning
Critical Security vulnerability, data loss risk, or production-breaking bug
High Logic error with significant impact, or major performance regression
Medium Maintainability concern, minor duplication, or unclear naming
Low Style nit, non-critical lint warning, or cosmetic improvement

Read the full file on GitHub · 185 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. 2mo ago First seen · 185 lines · 24 tokens per session scan A 50bc97aff1ef

Subscribe to this mod's changes

code-review is a skill published in the GitHub repository guyoung/boxagnts (11 stars, last pushed 3mo ago), licensed MIT. It adds 24 tokens to every session and 2,134 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 2026-08-30.

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Related

code-review compared with skills from other repositories

code-review next to 6 skills from other repositories
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