**PRD:** FR-17. Inbound messages handled idempotently (no duplicate execution); outbound replies delivered reliably. ### Scope - [ ] Dedupe inbound on provider message id - [ ] Reliable outbound delivery with retry - [ ] Per-channel rate-limit handling ### Done when A redelivered inbound message never double-executes, and replies are not lost on transient failures.
PRD: FR-17.
Inbound messages handled idempotently (no duplicate execution); outbound replies delivered reliably.
Scope
Done when
A redelivered inbound message never double-executes, and replies are not lost on transient failures.