Module diagnostics 

Opt-in payload-free lifecycle diagnostics without automatic logging.

Structs

DiagnosticContext

Validated provider and operation context for one lifecycle event.

DiagnosticResponse

Payload-free response metadata admitted for diagnostics.

NoopDiagnosticObserver

Disabled observer used by ordinary client methods.

Enums

DiagnosticErrorCategory

Finite payload-free client failure category.

DiagnosticEvent

Structured client lifecycle event containing no request or response payload.

DiagnosticRequestId

Request-identifier observation without identifier bytes.

DiagnosticRetryCategory

Retry classification copied from validated operation metadata.

Traits

DiagnosticObserver

Caller-owned opt-in sink for payload-free lifecycle events.