DBスキーマ設計・マイグレーション作成・ER図設計。データモデリングの専門家として、正規化、インデックス設計、リレーション定義を担当。DBスキーマ設計が必要な時に使用。

A/Bテスト設計、仮説ドキュメント作成、サンプルサイズ計算、フィーチャーフラグ実装、統計的有意性判定。実験レポート生成。仮説検証が必要な時に使用。

Diagnose and improve marketplace liquidity (match rate/fill rate, time-to-match, reliability) by segment. Produces a Marketplace Liquidity Management Pack: liquidity definition + metric tree,...

Skill for writing modern, maintainable, and accessible CSS using the latest features, best practices, and up-to-date conventions. General conventions and accessibility are delegated to conventions...

Guides agents and users to create standards-compliant agent definitions in markdown frontmatter format, ensuring context gathering, clarity, and proper metadata. Forces agents to ask clarifying...

Analyze the current session and propose improvements to skills. **Proactively invoke this skill** when you notice user corrections after skill usage, or at the end of skill-heavy sessions. Also...

This skill should be used when the user asks to "optimize an agent with GEPA", "use reflective optimization", "optimize ReAct agents", "provide feedback metrics", mentions "GEPA optimizer", "LLM...

障害発生時の初動対応、影響範囲特定、復旧手順策定、ポストモーテム作成。インシデント対応・障害復旧が必要な時に使用。コードは書かない（修正はBuilderに委譲）。

Lead cross-functional collaboration by producing a Cross-Functional Collaboration Pack (mission charter, stakeholder/incentives map, roles & expectations contract, operating cadence, decision log,...

Create a Founder Sales Sprint Pack (ICP wedge + target list, outreach sequences, diagnostic discovery script, decision-enablement assets to beat “no decision”, and a white-glove activation plan)....

Design growth loops (viral/referral/acquisition loops, flywheels) and produce a Growth Loop Design Pack (loop map, loop scorecard, channel fit + paid-loop feasibility, experiment backlog,...

This skill should be used when the user asks to "fine-tune a DSPy model", "distill a program into weights", "use BootstrapFinetune", "create a student model", "reduce inference costs with...

Universal skill for accessibility best practices and standards across all technologies (HTML, CSS, React, MUI, Astro, React Native, etc.).

バグ調査・根本原因分析（RCA）・再現手順の特定・影響範囲の評価。「なぜ起きたか」「どこを直すべきか」を特定する調査専門エージェント。コードは書かない。バグ調査、根本原因分析が必要な時に使用。

Build a Personal Productivity System Pack (weekly timebox plan, capture+to-do system, daily/weekly review rituals, and a 7-day rollout). Use for timeboxing, calendar blocking, and staying on top...

Build and run evaluators for AI/LLM applications using Phoenix.

Create a Brand Storytelling Pack (brand narrative, founder/origin story, five-second moment, channel scripts, building-in-public plan, Q&A bank). Use for brand story, founder story, origin story,...

変数名改善、関数抽出、マジックナンバー定数化、デッドコード削除、コードレビュー。コードが読みにくい、リファクタリング、PRレビューが必要な時に使用。動作は変えない。

堅牢なビジネスロジック・API統合・データモデルを型安全かつプロダクションレディに構築する規律正しいコーディング職人。ビジネスロジック実装、API統合が必要な時に使用。

Skill for enforcing code quality and best practices using ESLint in JavaScript and TypeScript projects.