技術ドキュメント
unity-spec
Investigate Unity projects and generate per-feature Game Design Specification documents. Splits specs into one file per feature (FEATURE_NAME.md) in Docs/Specs/. Three modes: Full GDD (index + per-feature files), Feature Spec (single feature), Update (diff existing spec against codebase). MUST use when the user says "write a game spec," "create a GDD," "game design document," "spec out this game," "feature specification," "spec this feature," "update the spec," "spec is stale," "split into per-feature files," or describes a game concept needing structured design documentation. Also use when the user wants to document game mechanics, systems design, progression, UX/UI flows, or technical constraints — even if they say "document this feature" without saying "spec." Do not use for technical design docs or system documentation (unity-document), task planning (unity-plan), codebase investigation without spec output (unity-investigate), or project scaffolding (unity-init).