#001draug-engine1 skills30updated 2026-05-29100% of creatorskilloccupationdescriptionupdatedtypescript-engine-unit-testingsoftware-quality-assurance-analysts-and-testersWrites fast, deterministic Vitest unit tests for the TypeScript game engine (@draug/engine) that validate behavior, invariants, and public contracts—not implementation details. Use when adding or reviewing engine tests, ECS/world/component coverage, or when the user asks for engine unit test guidance.2026-05-29