N-06: export one idempotency-key authority from mutation-intent.ts and use it
in the V2 client. A caller-supplied key is validated before credentials, timers
and fetch, and an invalid value is rejected as VALIDATION_REJECTED /
IDEMPOTENCY_KEY_INVALID rather than trimmed, regenerated or dropped, so a keyed
command can no longer replay while sending no key.
N-07: bound the legacy credential wait by the existing attempt controller,
which already carries the total deadline and the caller signal, so a
non-cooperative owner cannot hold the request open and no extra timer is
introduced. The owner receives the operation context, and the failure follows
ownership: deadline to REQUEST_TIMEOUT, caller to REQUEST_ABORTED, and only a
genuine rejection to AUTH_INTEGRATION_FAILURE. None of these paths fetch.
N-08: readBoundedJson delegates to the common bounded reader, so cancel and
releaseLock throws stay isolated inside the closed result, and the V2
content-type mismatch now cancels the response body.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Separate per-attempt physical state from the logical execution history. The
executor now keeps one monotonic certainty accumulator joined through
joinMutationEffectCertainty, records MAYBE_APPLIED at dispatch, and reads the
accumulator from every retry-loop fence, final-invariant, cancellation and
timeout return.
A retry-time scope fence landing between the loop-entry check and the
pre-dispatch invariant can no longer downgrade an already dispatched command to
NOT_STARTED.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Project one typed HttpExecutionObservation per logical V3 execution through a
closed composition-root projector: only registered diagnostic context keys and
bucketed values reach the sinks, and terminal non-abort failures now emit
exactly one api.request.failed telemetry event. Caller cancellation and scope
fencing record a diagnostic but never a failure event.
routeId becomes a required input at the installed operation-executor boundary
so the feature gateway's low-cardinality route identity survives to the sink.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
