Claude Code Harness is a development workflow for coding agents that organizes work into planning, implementation, review, synchronization, and release stages. It helps developers keep specifications, tests, independent reviews, and release evidence connected while using tools such as Claude Code, Codex CLI, Cursor, or Grok.
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.
npx skills add Chachamaru127/claude-code-harness --skill cc-update-reviewgit clone --depth 1 https://github.com/Chachamaru127/claude-code-harnessWrote 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.
[](https://agentmods.dev/skills/chachamaru127/claude-code-harness/cc-update-review)<a href="https://agentmods.dev/skills/chachamaru127/claude-code-harness/cc-update-review"><img src="https://agentmods.dev/badge/skills/chachamaru127/claude-code-harness/cc-update-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.
<a href="https://agentmods.dev/skills/chachamaru127/claude-code-harness/cc-update-review"><img src="https://agentmods.dev/badge/skills/chachamaru127/claude-code-harness/cc-update-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00033 | $0.02725 |
| Opus 5 | $0.00016 | $0.01362 |
| Sonnet 5 | $0.00007 | $0.00545 |
| Haiku 4.5 | $0.00003 | $0.00272 |
Grade A, and why
cc-update-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.
How it starts
The opening of the file, as written. The whole thing — 224 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Claude/Codex Update Review ガードレール
Claude Code / OpenAI Codex のアップデート統合時に「Feature Table に書いただけ」を防止する品質ガードレール。 Feature Table への追加が実装・検証・明示的な将来タスク化を伴っているかを分類し、不足があれば実装案を強制出力する。
Quick Reference
以下の状況でこのスキルがトリガーされる:
- Claude Code / Codex upstream update 統合 PR のレビュー時
docs/CLAUDE-feature-table.mdに新行が追加された diff を検出した時/harness-reviewが upstream update 統合 PR と判定した場合の内部呼び出しclaude-codex-upstream-updateスキル更新のレビュー時
トリガーしない状況:
- 通常の実装作業
- Feature Table / upstream 追従に関係しない変更
- セットアップ・初期化作業
差分入力の取得
このスキルは diff-aware review 専用のため、必ず以下のどちらかでレビュー対象差分を確定する。
- 呼び出し元の
/harness-reviewが PR diff / changed files / Feature Table 追加行を渡す - このスキル自身が read-only Bash で
git status --short,git diff --name-only,git diff -- docs/CLAUDE-feature-table.md,git show --stat --name-onlyなどを実行して確認する
Bash は read-only git inspection のみに使う。テスト実行、format、生成、network access、ファイル変更を伴うコマンドは実行しない。
diff が取得できない場合は B: 書いただけ 0 件 と推定せず、「差分未提供のため分類不能」としてレビューを止める。
前提チェック
レビュー冒頭で必ず確認する:
- diff source が呼び出し元提供または read-only git inspection のどちらかで確定しているか
skills/やhooks/を編集した PR の場合、直後に/reload-pluginsを実行して runtime cache を更新したか（{skills,hooks}/**ガイドライン準拠）- upstream のバージョン別分解表があるか
- Claude Code の一次情報 URL が
anthropics/claude-codeまたは公式 docs になっているか - Codex の一次情報 URL が
openai/codex/releasesまたは OpenAI 公式記事になっているか B: 書いただけが残っていないか- skill mirror を触る場合、
skills/,codex/.codex/skills/,.agents/skills/の差分が意図通りか
禁止する古い参照:
- 旧 TypeScript guardrail path
- 旧 TypeScript implementation glob
- 旧 Codex feature-table path
- 旧 Codex plugin directory
- 旧 Codex state directory を現行正本として扱う記述
- 存在しない Anthropic 側 Codex repo URL
A/B/C/P 分類
Feature Table に追加された各項目を、以下の A/B/C/P のいずれかに分類する。
(A) 実装あり
定義: Feature Table の追加に対応する hooks / settings / Go / scripts / agents / skills / tests の変更が同じ PR に含まれている。
判定条件:
- Feature Table の行で言及されている機能に関連するファイルが変更されている
hooks/hooks.json,.claude-plugin/hooks.json,.claude-plugin/settings.json,go/internal/guardrail/,go/internal/hookhandler/,scripts/,agents/,skills/,tests/のいずれかに実体差分がある- 対象テストまたは検証スクリプトで固定されている
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.
- 9d ago First seen · 224 lines · 33 tokens per session scan A 250baebbec5b
cc-update-review is a skill published in the GitHub repository Chachamaru127/claude-code-harness (3,098 stars, last pushed yesterday), licensed MIT. It adds 33 tokens to every session and 2,725 once invoked, about $0.0002 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 2026-08-30.
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