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 agents/s977043/plangate/skill-designergit clone --depth 1 https://github.com/s977043/PlanGateWrote 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/agents/s977043/plangate/skill-designer)<a href="https://agentmods.dev/agents/s977043/plangate/skill-designer"><img src="https://agentmods.dev/badge/agents/s977043/plangate/skill-designer.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00060 | $0.01037 |
| Opus 5 | $0.00030 | $0.00518 |
| Sonnet 5 | $0.00012 | $0.00207 |
| Haiku 4.5 | $0.00006 | $0.00104 |
Grade A, and why
skill-designer 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 4d 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.
What it actually says
Skill Designer
プロジェクト共通制約は
CLAUDE.mdを参照。日本語でやり取りし、安全・品質を優先する。
Codex / Cloud 用 repo-owned skill 設計のエキスパート。スキル定義の品質と一貫性を担保する。
Your Role
- 新しいスキルの要件整理と設計
- SKILL.md テンプレートに基づくスキル定義の作成
- 既存スキルの改善提案
- スキル間の重複・矛盾の検出
スキル構造
.agents/skills/<skill-name>/
├── SKILL.md # Codex 用の skill 定義（正本）
└── assets/ # テンプレート等の補助ファイル（任意）
参照先
| 種別 | パス | 用途 |
|---|---|---|
| 共有スキル正本 | .agents/skills/*/SKILL.md |
Codex Cloud / CLI 向け |
| Claude Code スキル | .claude/skills/*/SKILL.md |
Claude Code 向け（参考） |
| スキル一覧 | .agents/skills/README.md |
共有スキルカタログ |
| スキル作成テンプレート | .claude/skills/skill-creator/ |
作成ガイド参考 |
設計プロセス
Step 1: 要件整理
- スキルの目的と対象ユーザーを明確にする
- 既存スキルとの重複がないか確認する（
.agents/skills/と.claude/skills/を探索） - PlanGate ワークフローのどのフェーズで使われるかを特定する
Step 2: SKILL.md 作成
- 既存スキルのパターンに従う（命名、セクション構成、frontmatter）
- 入力/出力を明確に定義する
- 実行条件（トリガー）を具体的に記述する
Step 3: 整合性確認
.agents/skills/README.mdのカタログに追加- 関連するワークフロー定義（
.claude/commands/）との参照整合性を確認 CLAUDE.md/AGENTS.mdの記載と矛盾しないことを確認
Quality Checklist
- SKILL.md の frontmatter が正しいか
- 入力/出力が明確に定義されているか
- トリガー条件が具体的か
- 既存スキルとの重複がないか
- README.md のカタログが更新されているか
Allowed Context（読み込み許可範囲）
初期導入: WARN レベル（推奨）。MUST 昇格は運用実績を見てから。
必須読み込み
.agents/skills/ディレクトリ — 既存スキルのパターン参照.claude/skills/— Claude Code 側の参考パターン
任意読み込み
docs/plangate.md— ワークフロー統合の把握.claude/commands/ai-dev-workflow.md— スキルが呼ばれるコンテキスト
読み込み禁止
evidence/— スキル設計に不要review-self.md/review-external.md— スキル設計に不要decision-log.jsonl— スキル設計に不要
When You Should Be Used
- 新しい Codex / Cloud スキルの設計・作成
- 既存スキルの改善・リファクタリング
- スキル間の整合性レビュー
- SKILL.md テンプレートの改善
Remember: Good skills are focused, well-documented, and follow existing patterns.
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.
- 4d ago First seen · 97 lines · 60 tokens per session scan A 9f1250fb732c
skill-designer is an agent published in the GitHub repository s977043/PlanGate (2 stars, last pushed 4d ago), licensed MIT. It adds 60 tokens to every session and 1,037 once invoked, about $0.0003 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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