codex-harness: Skill for Claude Code

.codex/skills/harness-review/SKILL.md

harness-review is a skill for Claude Code, Codex from Chachamaru127/codex-harness. It costs 77 tokens per session (6,424 once invoked), scanned A, original, MIT.

A review workflow that examines code, plans, or project scope from several angles. Depending on the context, it checks changes, quality, security, performance, accessibility, SEO, or whether a plan is clear and feasible.

In plain words
What is it for?
Use it for code reviews, plan reviews, scope analysis, security and performance checks, accessibility checks, SEO checks, and PR or diff review.
Why use it?
It helps find problems before code is committed or work expands beyond its original purpose. It also provides a structured review of proposed plans and changes.

Skill for Claude CodeCodex

Written for Claude Code and Codex: allowed-tools in frontmatter, but also installed under .codex/. Also seen: mentions Claude Code; mentions Codex.

This is Chachamaru127/codex-harness's own configuration. It tells Claude Code and Codex how to work on codex-harness itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything codex-harness configures →

Runs only inside a plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else, and the catalogue could not identify which plugin ships it.

Reuse

Borrowing it

Nothing to install: this file belongs to Chachamaru127/codex-harness. 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/Chachamaru127/codex-harness/main/.codex/skills/harness-review/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/Chachamaru127/codex-harness

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 harness-review

README.md
[![agentmods](https://agentmods.dev/badge/skills/chachamaru127/codex-harness/harness-review/github.svg)](https://agentmods.dev/skills/chachamaru127/codex-harness/harness-review)
Your own site
<a href="https://agentmods.dev/skills/chachamaru127/codex-harness/harness-review"><img src="https://agentmods.dev/badge/skills/chachamaru127/codex-harness/harness-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 harness-review

Your own site · 80×15
<a href="https://agentmods.dev/skills/chachamaru127/codex-harness/harness-review"><img src="https://agentmods.dev/badge/skills/chachamaru127/codex-harness/harness-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 77 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 6,424 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 $0.00077 $0.06424
Opus 5 $0.00039 $0.03212
Sonnet 5 $0.00015 $0.01285
Haiku 4.5 $0.00008 $0.00642

Measured 9d ago against content hash 93cb9c8d7503, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

harness-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 9d 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/harness-review/SKILL.md · 615 lines

How it starts

The opening of the file, as written. The whole thing — 615 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Review Skills

コードレビュー、計画レビュー、スコープ分析を担当するスキル群です。 コンテキストからレビュータイプを自動判定します。

レビュータイプ(Context-Aware)

レビュータイプはコンテキストから自動判定されます:

Recent Activity Review Type 4 Experts
/plan-with-agent Plan Review Clarity, Feasibility, Dependencies, Acceptance
/work Code Review Security, Performance, Quality, Accessibility
タスク追加後 Scope Review Scope-creep, Priority, Feasibility, Impact

手動指定

/harness-review           # 自動判定
/harness-review code      # コードレビュー強制
/harness-review plan      # 計画レビュー強制
/harness-review scope     # スコープ分析強制

機能詳細(Code Review)

機能 詳細
変更レビュー See references/changes-review.md
品質チェック See references/quality-review.md
セキュリティ See references/security-review.md
パフォーマンス See references/performance-review.md
アクセシビリティ See references/accessibility-review.md
SEO/OGP See references/seo-review.md
Codex 統合 See references/codex-integration.md
コミット判定 See references/commit-judgment-logic.md

機能詳細(Plan/Scope Review)

Plan Review と Scope Review は Codex エキスパートを使用します:

レビュータイプ エキスパート 参照
Plan Review Clarity, Feasibility, Dependencies, Acceptance ../codex-review/references/experts/clarity-expert.md
Scope Review Scope-creep, Priority, Feasibility, Impact ../codex-review/references/experts/scope-creep-expert.md

詳細: ../codex-review/references/codex-parallel-review.md

実行手順

  1. 品質判定ゲート(Step 0)
  2. 残コンテキスト確認(Codex モード時)(Step 1)
  3. ユーザーのリクエストを分類
  4. (Claude-mem 有効時)過去のレビュー指摘を検索
  5. 並列実行の判定(下記参照)
  6. 上記の「機能詳細」から適切な参照ファイルを読む、または並列サブエージェント起動
  7. 結果を統合してレビュー完了

Read the full file on GitHub · 615 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. 9d ago First seen · 615 lines · 77 tokens per session scan A 93cb9c8d7503

Subscribe to this mod's changes

harness-review is a skill published in the GitHub repository Chachamaru127/codex-harness (2 stars, last pushed 6mo ago), licensed MIT. It adds 77 tokens to every session and 6,424 once invoked, about $0.0004 per session on Opus 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 2026-08-31.