REQ-FUN-044
Error responses conform to documented model with code, message, details, trace_id
What
Error responses SHALL conform to a documented error model with code, message, details, trace_id.
Acceptance
Schema-validated in OpenAPI; tests cover error cases.
Source
OBJ-1.
established project management guidelines Mapping
Structured error responses are the communications contract for callers - supports trace-id-driven monitoring.