@eristack/ai-knowledge
idempotency-and-outbox
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Canonical idempotency + outbox guide: HTTP replay, ledger dedup, comms/payment ordering, PO UNIQUE.
Idempotency and outbox
Load one file: knowledge/idempotency-and-outbox.md.
Four layers: client key → @eristack/idempotency → domain UNIQUE → @eristack/outbox. Ledger dedup lives in @eristack/hash-chained-ledger (idempotencyKey on append).