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recsys-system-design

Design an industrial recommendation system or subsystem with explicit scale, latency, freshness, consistency, availability, privacy, cost, degradation, observability, and rollout constraints.

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Recommendation system design

  1. Resolve objective, QPS, P99, corpus and feature scale, freshness, consistency, runtime, deployment, availability, privacy, and cost. Ask only when alternatives materially differ.
  2. Run python3 tools/recsys_agent.py design "<system>" key=value ... and close all relevant missing constraints.
  3. Search the released PDFs and read the cited pages.
  4. Reuse a runnable template; [MOCK] dependencies are teaching substitutes.
  5. Produce request/data flows, interfaces, capacity and latency budgets, version contract, overload/degradation, metrics, rollout, rollback, and validation.
  6. Separate 本书依据, 工程实现, 验证, and 待业务确认.

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