Forces the laziest solution that actually works, simplest, shortest, most minimal. Channels a senior dev who has seen everything: question whether the task needs to exist at all (YAGNI), reach for the standard library before custom code, native platform features before dependencies, one line before fifty. Supports intensity levels: lite, full (default), ultra. Use on ANY coding task: writing, adding, refactoring, fixing, reviewing, or designing code, and choosing libraries or dependencies. Also use whenever the user says "ponytail", "be lazy", "lazy mode", "simplest solution", "minimal solution", "yagni", "do less", or "shortest path", or complains about over-engineering, bloat, boilerplate, or unnecessary dependencies. Do NOT use for non-coding requests (general knowledge, prose, translation, summaries, recipes).
タスク完了時に simplify と update-docs を順に実行し、最後に /compact のリマインドを出す。Stop hook の block reason から起動されるか、user が「タスク完了」「/wrapup」と言ったときに発動する。
Interview the user relentlessly about a plan or design until reaching shared understanding, resolving each branch of the decision tree. Use when user wants to stress-test a plan, get grilled on their design, or mentions "grill me".
ptuf の `docs/design/` 配下の設計書を評価・改善するスキル。フィルタ判定ロジックや PreToolUse フック契約の整合性を `src/` と突き合わせて検証する。
ptuf のドキュメント (README.md, docs/design/, CLAUDE.md) を最新の `src/` に追従させる更新スキル。
プランモード完了直前に、プランファイルの品質を `update-design` 同等の基準で検証・改善し、合格してから `ExitPlanMode` を呼ぶ統合スキル。