Production Readiness

stable request_id, trace_id, idempotency_key
stable handling for text or structured_input
handles both 200 and 202
persists sync output, usage_applications, optional exact_bridge, and async workflow references
never calls zhen-brain-core directly
has a retry and fallback rule for admission failure

If neutral protocol objects are carried for audit or translation purposes, keep them inside structured_input instead of treating them as the default top-level platform request shape.

Use this checklist before go-live for any public or partner-facing C2AI2X integration.