agarichan/skill-authoring
skills/skill-authoring/SKILL.md
Use when creating, editing, reviewing, naming, or restructuring an Agent Skill (SKILL.md / スキル) — even if the user doesn't say "Agent Skills" but is working in a skill directory, designing skill metadata, or asking to fix/improve a skill that didn't trigger or behaved unexpectedly. Provides the official specification, progressive disclosure model, and description-optimization methodology.
testing
Updated Apr 25, 2026
$ install --global
skillsauthnpx skillsauth add agarichan/skills skill-authoringInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
Security Scan Results
3 of 9 scanners reported clean
Some scanners were skipped, did not run, or reported a non-clean status. Review each row below.
3
Scanners Passed
9
Scanners in report
Clean
TrivyContainer and dependency vulnerability scanner
95%
Clean
SemgrepStatic code analysis for vulnerabilities
95%
Clean
mcp-scan (Snyk)Model Context Protocol security validation
95%
Skipped
Snyk (dep)Open source security scanning
50%
Skipped
Socket.devSupply chain security analysis
50%
Skipped
VirusTotalMulti-engine malware detection
50%
Skipped
CrowdStrikeAdvanced threat intelligence
50%
Skipped
OSV-ScannerOpen Source Vulnerability database check
50%
Skipped
OWASP Dep-Check
50%
Last scanned: Apr 25, 2026, 5:16 PM117.8s5 files scanned
SKILL.md
- name:
- skill-authoring
- description:
- >
Agent Skills 公式仕様リファレンス
Agent Skills は Anthropic 発のオープン標準。エージェントにスキル（手順・知識・リソースのフォルダ）を与えるフォーマット。Claude Code / Cursor / Gemini CLI / OpenCode 等が対応。
一次情報
- 仕様: https://agentskills.io/specification
- 概要: https://agentskills.io/what-are-skills
- 公式サンプル: https://github.com/anthropics/skills
- エコシステム: https://agentskills.io
最小構成
skill-name/
├── SKILL.md # 必須。メタデータ + 手順
├── scripts/ # 任意。実行可能コード
├── references/ # 任意。追加ドキュメント
└── assets/ # 任意。テンプレ・画像・データ等
詳細
- Frontmatter 全フィールド、命名規則、本文、validation → references/specification.md
- Progressive disclosure の3層モデル、サイズ目安、ファイル参照規則 → references/progressive-disclosure.md
- description の最適化（4原則、クエリ設計による紙面レビュー） → references/optimizing-descriptions.md
- ベストプラクティス（coherent unit、命令の強弱、gotchas、validation loop、plan-validate-execute 等） → references/best-practices.md
オリジナル追加ルール（公式仕様より厳しい独自制約）
スキルを新規作成・編集する際、公式仕様に加えて以下を守る:
SKILL.mdは 100 行以内references/配下は 1 ファイルあたり 500 行以内
いずれも超過しそうな場合は、さらなる分割（references/ への切り出し、複数ファイル化）を検討する。
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