Fetch known facts or data from specified sources with citations and evidence pointers. Use when you know what you need and where to find it. Emphasizes provenance and verifiable references.

Convert data between formats, schemas, or representations with explicit loss accounting and validation. Use when reformatting data, mapping between schemas, normalizing inputs, or translating structures.

Ask Google Gemini questions about code to understand implementations, architecture, patterns, and debugging. Use when the user asks how code works, where something is implemented, what patterns...

Retrieve prior decisions, rationale, and learned patterns from memory to apply consistently. Use when needing context from previous interactions, looking up past decisions, or ensuring consistency...

Break a goal into subgoals, constraints, and acceptance criteria. Use when planning complex work, creating work breakdown structures, or defining requirements.

Split work across subagents with explicit contracts, interfaces, and merge strategies. Use when parallelizing tasks, distributing workload, or orchestrating multi-agent workflows.

Combine heterogeneous data sources into a unified model with conflict resolution, schema alignment, and provenance tracking. Use when merging data from multiple systems, consolidating information,...

Ingest and parse incoming messages, events, or signals into structured form. Use when processing external inputs, handling API responses, parsing webhook payloads, or ingesting sensor data.

Create a new artifact (text, code, plan, data) under specified constraints. Use when producing content, writing code, designing solutions, or synthesizing outputs.

Emit a message or event to an external system with policy enforcement and approval gates. Use when publishing messages, calling APIs, sending notifications, or triggering external workflows....

Produce clear reasoning with assumptions, causal chains, and evidence. Use when clarifying decisions, teaching concepts, justifying recommendations, or documenting rationale.

Find failure modes, edge cases, ambiguities, and exploit paths in plans, code, or designs. Use when reviewing proposals, auditing security, stress-testing logic, or validating assumptions.

Execute development tasks using Google Gemini CLI for code generation, refactoring, and modifications. Use when the user needs to create code, add features, refactor, fix bugs, or generate tests....

Guides subagent coordination through implementation workflows. Use when orchestrating multiple agents, managing workflow phases, or determining autonomous execution mode. Defines scale...

既存データ/ロジックを活用した新機能をMarkdown仕様書で提案。新機能のアイデア出し、プロダクト企画、機能提案が必要な時に使用。コードは書かない。

Transform a youtube video / youtube playlist in a SKILL.md file, allowing Claude Code to learn new skills/workflows from video content

OWASP ZAP/Burp Suite連携、ペネトレーションテスト計画、DAST実行、脆弱性スキャン。動的セキュリティテスト、侵入テスト、実行時脆弱性検証が必要な時に使用。Sentinelの静的分析を補完。

依存関係管理、CI/CD最適化、Docker設定、運用監視設定（ロギング/アラート/ヘルスチェック）。ビルドエラー、開発環境、運用設定の問題が必要な時に使用。

非推奨ライブラリの検出、ネイティブAPI置換提案、新技術のPoC作成。技術スタック刷新、モダナイゼーション、レガシーコード更新が必要な時に使用。

ユーザーインタビュー設計・質問ガイド作成、ユーザビリティテスト計画、定性データ分析、ペルソナ作成・ジャーニーマップ作成。ユーザーリサーチ設計・分析が必要な時に使用。EchoのUI検証を補完。