whetstone_DSL/tmp_eval_large_specs_20260303/cp_024_python.md

Event Deduplicator (cp_024)

Objective

Build an event deduplicator using idempotency keys, time windows, and replay-safe writes.

Language & Library Constraints

• Primary language: python
• Available libraries: fastapi, pydantic, sqlalchemy, requests
• Use library APIs explicitly where suitable in execution contracts.

Acceptance

• Deterministic taskitems with strict execution contracts.
• Include selected library and preferred APIs when applicable.