implement-service

Design domain services by defining public interfaces, implementing them with dependency injection and AppScope, and enforcing Result-based error handling for reliable orchestrated workflows across mobile architecture modules.

Define domain service interfaces in public modules to express domain language, implement them in internal :impl modules with AppScope injection, and create fakes in a :fake module to support deterministic testing and contract validation.

Test domain service orchestration by generating fakes in a dedicated :fake module, then write tests using those fakes to verify Result-based error handling, orchestration logic, and contract compliance across modules.

Yes, domain service implementation uses dependency injection patterns with AppScope integration to compose services and dependencies, ensuring separation of concerns in line with documented architectural conventions for mobile architectures.

Result-based error handling provides structured, safe error management for domain service workflows, ensuring reliable orchestration and clear business logic validation across module boundaries.

Yes, the pattern applies to building and testing domain services including contract validation across modules, using fakes and interface design to verify orchestration and error handling compliance.