Agent Skills: effect-sdd

Service-Driven Development workflow for Effect-TS. Schema-first, type-driven, property-tested. USE THIS SKILL WHEN: Designing a new feature spanning 3+ services, sketching service boundaries before implementation, user says 'design', 'sketch', 'SDD', 'service-driven', planning multi-service composition. NOT FOR: single-service CRUD, implementing against an existing spec. TRIGGERS ON: 'design services', 'sketch services', 'SDD', 'service-driven', 'type-driven design', 'design the API first', 'audit services', 'bring to SDD standard', 'SDD audit'