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 agentmods add skills/chachamaru127/codex-harness/parallel-workflowsnpx skills add Chachamaru127/codex-harness --skill parallel-workflowsgit clone --depth 1 https://github.com/Chachamaru127/codex-harnessWhat 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 | $0.00047 | $0.02102 |
| Opus 5 | $0.00023 | $0.01051 |
| Sonnet 5 | $0.00009 | $0.00420 |
| Haiku 4.5 | $0.00005 | $0.00210 |
Grade A, and why
parallel-workflows 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 yesterday.
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 — 284 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Parallel Workflows Skill
複数タスクの並列実行を最適化するスキル。 Task ツールを活用して、独立したタスクを同時に処理します。
トリガーフレーズ
このスキルは以下のフレーズで自動起動します:
- 「並列で実行して」「同時にやって」
- 「まとめてやって」「一気にやって」
- 「効率的にやって」「速くやって」
- "run in parallel", "do these together"
関連コマンド
/work- Plans.md のタスクを実行(並列実行対応)
概要
Claude Code は複数のタスクを並列実行できます。 このスキルは、どのタスクが並列化可能かを判断し、最適な実行計画を立てます。
並列化パターン
パターン1: 複数ファイルの同時分析
使用場面: コードレビュー、構造把握
Task tool を並列起動:
- agent1: src/components/ を分析
- agent2: src/lib/ を分析
- agent3: src/app/ を分析
VibeCoder向け言い方:
「このプロジェクトの構造を教えて」
→ 自動的に並列分析を実行
パターン2: テストとビルドの同時実行
使用場面: CI/CD、品質チェック
並列実行:
- npm run lint
- npm run type-check
- npm run test
直列実行(依存あり):
- npm run build(上記が全て成功後)
VibeCoder向け言い方:
「チェックして」
→ lint, type-check, test を並列実行
パターン3: 複数機能の同時実装
使用場面: 独立した機能の開発
Plans.md:
- [ ] ヘッダーコンポーネント作成
- [ ] フッターコンポーネント作成
- [ ] サイドバーコンポーネント作成
→ 3つのTask agentを並列起動
VibeCoder向け言い方:
「レイアウトを全部作って」
→ 独立したコンポーネントを並列実装
判定ロジック
並列化可能な条件
- ファイル依存なし: 同じファイルを編集しない
- データ依存なし: 出力が他の入力にならない
- 順序依存なし: 実行順序が結果に影響しない
並列化不可の例
❌ 並列化不可:
1. API クライアント作成
2. API クライアントを使うコンポーネント作成
→ 2は1の出力に依存
✅ 並列化可能:
1. ログインページ作成
2. 会員登録ページ作成
→ 互いに独立
実装ガイド
Task ツールを使った並列実行
// 並列実行パターン
const tasks = [
{ name: "タスクA", prompt: "..." },
{ name: "タスクB", prompt: "..." },
{ name: "タスクC", prompt: "..." }
];
// 全てのタスクを run_in_background: true で起動
// TaskOutput で結果を収集
統合レポートの生成
各タスク完了後、以下の形式でレポートを生成:
## 📊 並列タスク実行レポート
**実行日時**: {{timestamp}}
**タスク数**: {{count}}件(並列実行)
**所要時間**: {{duration}}秒
### 完了タスク
| # | タスク | ステータス | 所要時間 | 成果物 |
|---|-------|----------|---------|-------|
{{#each tasks}}
| {{index}} | {{name}} | {{status}} | {{duration}}秒 | {{output}} |
{{/each}}
### 変更ファイル一覧
{{#each files}}
- `{{path}}` ({{action}})
{{/each}}
実行例
例1: プロジェクト分析
ユーザー: 「このプロジェクトについて教えて」
Claude Code:
🔍 プロジェクトを並列分析中...
├── [Agent 1] 構造分析中...
├── [Agent 2] 依存関係チェック中...
└── [Agent 3] コード品質分析中...
完了!
📁 プロジェクト概要:
- フレームワーク: Next.js 14
- 主要ディレクトリ: 15個
- ファイル数: 87個
- 依存パッケージ: 23個
- コード品質: 良好(lint警告: 3件)
What ships with it
5 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.
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.
- yesterday First seen · 284 lines · 47 tokens per session scan A 3eb688e52cac
parallel-workflows is a skill published in the GitHub repository Chachamaru127/codex-harness (2 stars, last pushed 6mo ago), licensed MIT. It adds 47 tokens to every session and 2,102 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 2026-08-31.
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