code-review

code-review is a skill for Claude Code, Codex from 0xNyk/oneclaw. It costs 0 tokens per session (381 once invoked), scanned A, original, MIT.

A code-review guide for examining code and configurations for bugs, security risks, regressions, and missing tests.

In plain words
What is it for?
Use it to review a branch or selected files, check areas such as input handling and concurrency, report exact findings, and identify testing gaps.
Why use it?
It gives reviewers a consistent way to follow the relevant code path, rank findings by severity, and explain their impact without rewriting the code.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to review a branch or selected files, check areas such as input handling and concurrency, report exact findings, and identify testing gaps.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/0xnyk/oneclaw/code-review
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 0xNyk/oneclaw --skill code-review
Clone the repo
git clone --depth 1 https://github.com/0xNyk/oneclaw

Made for: Claude Code, Codex.

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/0xnyk/oneclaw/code-review/github.svg)](https://agentmods.dev/skills/0xnyk/oneclaw/code-review)
Your own site
<a href="https://agentmods.dev/skills/0xnyk/oneclaw/code-review"><img src="https://agentmods.dev/badge/skills/0xnyk/oneclaw/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/0xnyk/oneclaw/code-review"><img src="https://agentmods.dev/badge/skills/0xnyk/oneclaw/code-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 381 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 $0.00000 $0.00381
Opus 5.5 $0.00000 $0.00152
Sonnet 5.5 $0.00000 $0.00076
Haiku 4.5 $0.00000 $0.00038

Measured 1mo ago against content hash 9d3d9b5b2f40, 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 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.

src/skills/builtins/code-review/SKILL.md · 36 lines

What it actually says

Code Review

Use this skill when the user asks for a code review, audit, or “what could be wrong here”. The output should be a review, not a rewrite: prioritize bugs, security risks, behavioral regressions, and missing tests.

Workflow

  1. Ask for scope if missing: the PR/branch, files, and what “done” means.
  2. Read the relevant code and configs (don’t skim; follow the call chain).
  3. Enumerate findings ordered by severity:
    • Critical: security/data loss/corruption, auth issues, remote execution, unsafe deserialization
    • Major: crashes, correctness issues, race conditions, broken invariants
    • Minor: edge cases, confusing behavior, maintainability costs
    • Nit: style/readability (only after substantive issues)
  4. For each finding:
    • Point to the exact file/line (or function) and explain impact
    • Suggest a concrete fix (minimal diff) and/or a test that would catch it
  5. Call out testing gaps explicitly (what you didn’t verify).

Checklist (use as prompts while reviewing)

  • Input validation, boundary checks, and error handling
  • Security: secrets exposure, path traversal, command injection, SSRF, unsafe file writes
  • Concurrency: races, locks, shared mutable state, async blocking
  • Data correctness: parsing, serialization, schema drift, migrations
  • Observability: logs, metrics, missing context on errors
  • Performance: N+1 IO, repeated allocations, needless cloning
  • API/UX: breaking changes, confusing defaults, footguns
  • Tests: unit/integration coverage, regression tests for fixed bugs

Output Format

  • Findings first (bulleted), then open questions, then (optional) change summary.
  • If there are no findings, say so and note residual risks.
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 First seen · 36 lines · 0 tokens per session scan A 9d3d9b5b2f40

Subscribe to this mod's changes

code-review is a skill published in the GitHub repository 0xNyk/oneclaw (3 stars, last pushed 1mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 381 tokens. 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 2026-08-31.

Related

Other skills, from other repositories

requesting-code-review

Use when completing tasks, implementing major features, or before merging to verify work meets requirements.

kaivyy/kabot · 22 tokens

receiving-code-review

Use when receiving code review feedback, before implementing suggestions, especially if feedback seems unclear or technically questionable - requires technical rigor and verification, not performative agreement or blind implementation.

kaivyy/kabot · 38 tokens

python-repl

Interactive Python REPL automation with common helpers and best practices.

gptme/gptme · 15 tokens

hypotheses

Turns a research direction into testable hypotheses with predictions, competing explanations and the experiments that discriminate between them, including the design (controls, randomization, blocking), sample size or seed count, the pre-specified analysis, and the result that would falsify each hypothesis. Use when a…

synthetic-sciences/openscience · 99 tokens

crit-cli

Use when an agent needs to author or reply to crit inline comments programmatically (including multi-agent workflows commenting on shared code/plans/docs/proposals), publish or unpublish a crit review with crit share, sync a crit review to or from a GitHub PR or GitLab MR, or read/interpret a crit review JSON file.…

tomasz-tomczyk/crit · 110 tokens

crit

Review code changes, a plan, a live page (running dev server), or a local HTML file with Crit inline comments and structured human feedback. Use only when the user explicitly invokes /crit or directly asks to use Crit; a generic review request does not count.

tomasz-tomczyk/crit · 55 tokens