NPSS Client‑Server Idempotency Key Generation: Choosing Between Client‑Side and Server‑Side Approaches
Determine whether NPSS should require clients to supply an idempotency key for each write operation or derive a key server‑side from a deterministic hash of the payload. Client‑side generation introduces coordination overhead to prevent key reuse across distinct writes, which could silently drop valid updates, while server‑side derivation depends on a stable