A structured code-review guide that checks changed code for security, performance, correctness, maintainability, and style.

Use it before merging a pull request, after completing a feature, or as a quality check on a finished change.

It organizes findings by severity and gives each issue an actionable fix, making reviews easier to understand before merging changes.

How junghwaYang/oh-my-codex configures Codex

Reuse

Borrowing it

Nothing to install: this file belongs to junghwaYang/oh-my-codex. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/junghwaYang/oh-my-codex/main/.codex/skills/reviewer/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/junghwaYang/oh-my-codex

Made for: 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/junghwayang/oh-my-codex/reviewer/github.svg)](https://agentmods.dev/skills/junghwayang/oh-my-codex/reviewer)

Your own site

<a href="https://agentmods.dev/skills/junghwayang/oh-my-codex/reviewer"><img src="https://agentmods.dev/badge/skills/junghwayang/oh-my-codex/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/junghwayang/oh-my-codex/reviewer"><img src="https://agentmods.dev/badge/skills/junghwayang/oh-my-codex/reviewer.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 463 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.

Model	Per session	Once invoked
Fable 5.1	$0.00000	$0.00463
Opus 5.5	$0.00000	$0.00185
Sonnet 5.5	$0.00000	$0.00093
Haiku 4.5	$0.00000	$0.00046

Measured 2mo ago against content hash 8d29c70c1c6a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

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 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.

.codex/skills/reviewer/SKILL.md · 92 lines

What it actually says

Reviewer Skill

Code review with structured feedback.

When to Use

Before merging PRs
After completing a feature (self-review)
When user asks for code review
Quality gate checks

When NOT to Use

During active development (let them finish first)
For trivial changes
When user explicitly skips review

Review Categories

Category	Prefix	Priority
Security	SEC-	CRITICAL
Performance	PERF-	HIGH
Correctness	BUG-	HIGH
Maintainability	MAINT-	MEDIUM
Style	STYLE-	LOW

Workflow

1. SCAN
   - Read all changed files
   - Understand the intent

2. ANALYZE
   - Check each category
   - Note issues with severity

3. REPORT
   - Group by severity
   - Provide actionable feedback
   - Suggest fixes, not just problems

4. SUMMARIZE
   - Overall assessment
   - Blocking vs non-blocking issues

Review Output Format

## Code Review: {scope}

### Summary
{1-2 sentence overall assessment}

### Critical Issues
- **SEC-001**: {issue}
  - File: {path}:{line}
  - Fix: {suggestion}

### High Priority
- **PERF-001**: {issue}
  - File: {path}:{line}
  - Fix: {suggestion}

### Suggestions
- **MAINT-001**: {issue}
  - {suggestion}

### Verdict
[ ] ✅ Approve
[ ] ⚠️ Approve with comments
[ ] ❌ Request changes

Security Checklist (SEC-)

No hardcoded secrets
Input validation present
SQL injection protection
XSS prevention
Auth checks in place

Performance Checklist (PERF-)

No N+1 queries
Appropriate indexing
No memory leaks
Efficient algorithms

What ships with it

3 files 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.

2mo ago First seen · 92 lines · 0 tokens per session scan A 8d29c70c1c6a

Subscribe to this mod's changes

reviewer is a skill published in the GitHub repository junghwaYang/oh-my-codex (5 stars, last pushed 8mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 463 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.

Code review

reviewer next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
reviewerjunghwaYang/oh-my-codex	Skill	5	8mo ago	MIT	A	0	Codex
autoreviewopenclaw/clawhub	Skill	9.5k	today	MIT	A	17	Claude Code, Codex
agent-teams-simplify-and-hardenLeoYeAI/openclaw-master-skills	Skill	2.2k	6d ago	MIT	A	115	Claude Code, Codex
omh-code-reviewrlaope/oh-my-hermes	Skill	5.2k	today	MIT	A	48	Claude Code, Codex
revdiff-planumputun/revdiff	Skill	947	2d ago	MIT	A	84	Claude Code
explore-unknownsdzhng/skills	Skill	1.4k	today	MIT	A	162	Claude Code, Codex
re0-mergeLilMGenius/paperthin	Skill	1.4k	4d ago	MIT	A	70	Claude Code

oh-my-codex: Skill for Codex