What is codex-code-reviewer?

A systematic workflow for reviewing recently generated code with the Codex command-line tool against project rules and quality standards.

Use it when you explicitly want Codex to inspect generated or recently changed code, suggest fixes, apply approved changes, and review the result again.

It catches code problems through repeated review and validation instead of stopping after the first check. In interactive mode, it presents proposed fixes for approval before applying them.

codex-code-reviewer — Skill for Claude Code and Codex by VCnoC

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 VCnoC/Claude-Code-Zen-mcp-Skill-Work --skill codex-code-reviewer

Clone the repo

git clone --depth 1 https://github.com/VCnoC/Claude-Code-Zen-mcp-Skill-Work

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/vcnoc/claude-code-zen-mcp-skill-work/codex-code-reviewer/github.svg)](https://agentmods.dev/skills/vcnoc/claude-code-zen-mcp-skill-work/codex-code-reviewer)

Your own site

<a href="https://agentmods.dev/skills/vcnoc/claude-code-zen-mcp-skill-work/codex-code-reviewer"><img src="https://agentmods.dev/badge/skills/vcnoc/claude-code-zen-mcp-skill-work/codex-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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/vcnoc/claude-code-zen-mcp-skill-work/codex-code-reviewer"><img src="https://agentmods.dev/badge/skills/vcnoc/claude-code-zen-mcp-skill-work/codex-code-reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 96 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 3,475 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	$0.00096	$0.03475
Opus 5.5	$0.00038	$0.01390
Sonnet 5.5	$0.00019	$0.00695
Haiku 4.5	$0.00010	$0.00347

Measured 2mo ago against content hash da895ae87515, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

codex-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 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.

skills/codex-code-reviewer/SKILL.md · 341 lines

How it starts

The opening of the file, as written. The whole thing — 341 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Codex Code Reviewer

Overview

This skill provides a systematic, iterative code review workflow powered by zen mcp's codex tool. It automatically checks recently modified code files against project standards (CLAUDE.md requirements), presents identified issues to users for approval, applies fixes, and re-validates until code quality standards are met or the maximum iteration limit is reached.

Operation Modes:

Interactive Mode (Default): Present issues to user, wait for approval before applying fixes
Full Automation Mode: Automatically select and apply all suggested fixes without user approval (activated when user initially requests "full automation" or "complete automation")

When to Use This Skill

Trigger this skill when the user says:

"Use codex to check the code"
"Please help me check if the recently generated code has any issues"
"Check the code after each generation"
Similar requests for code quality validation using codex

Workflow: Iterative Code Review Cycle

Prerequisites

Before starting the review cycle:

** Read Operation Mode from Context (automation_mode - READ FROM SSOT):**
- automation_mode definition and constraints: See CLAUDE.md「📚 共享概念速查」
- This skill's role: Skill Layer (read-only), read from context [AUTOMATION_MODE: true/false], true → auto-fix / false → ask user

1a. Read Coverage Target from Context (coverage_target - READ FROM SSOT):

coverage_target definition and constraints: See CLAUDE.md「📚 共享概念速查」
This skill's role: Skill Layer (read-only), read from context [COVERAGE_TARGET: X%], validate coverage (≥ target pass, < 70% reject)

Identify Files to Review:
- Use git status or similar to identify recently modified files
- Interactive Mode (automation_mode = false): Confirm with user which files should be reviewed
- Automated Mode (automation_mode = true): Auto-select all recently modified files, log decision to auto_log.md
Initialize iteration counter: current_iteration = 1
Set maximum iterations: max_iterations = 5
Initialize review tool tracker: first_review_done = false
Detect Review Context:
- Check if this is final quality validation (project completion/final verification)
- If YES: Enable Final Validation Mode (requires minimum 2 passes: codereview + clink)
- If NO: Use Standard Review Mode

Read the full file on GitHub · 341 lines

Files

What ships with it

7 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 · 341 lines · 96 tokens per session scan A da895ae87515

Subscribe to this mod's changes

codex-code-reviewer is a skill published in the GitHub repository VCnoC/Claude-Code-Zen-mcp-Skill-Work (118 stars, last pushed 10mo ago), licensed Apache-2.0. It adds 96 tokens to every session and 3,475 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.

Code review

codex-code-reviewer next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
codex-code-reviewerVCnoC/Claude-Code-Zen-mcp-Skill-Work	Skill	118	10mo ago	Apache-2.0	A	96	Claude Code, Codex
autoreviewopenclaw/clawhub	Skill	9.5k	yesterday	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	yesterday	MIT	A	48	Claude Code, Codex
revdiff-planumputun/revdiff	Skill	945	yesterday	MIT	A	84	Claude Code
explore-unknownsdzhng/skills	Skill	1.4k	2d ago	MIT	A	162	Claude Code, Codex
re0-mergeLilMGenius/paperthin	Skill	1.4k	4d ago	MIT	A	70	Claude Code