furniture-service/docs/architecture/protocol-selection-policy.md

Protocol Selection Policy

Active Protocol Rule

• This service deployment uses one active protocol at a time.
• Internal default protocol is gRPC.
• Multi-protocol exposure is not allowed in a single deployment.
• gRPC message translation is isolated through adapter interfaces.

Boundary Placement

• Protocol adaptation stays at BFF boundaries.
• Service orchestration remains transport-neutral at application contracts.
• Service application composes catalog and inventory capability contracts via read ports.