Design a knowledge access layer that can serve both chat experiences and backend agents.

Instruction: Explain how you would design one retrieval layer for both user-facing chat and agent workflows.

Context: Assesses whether the candidate can design a practical architecture and explain the main tradeoffs. Explain how you would design one retrieval layer for both user-facing chat and agent workflows.

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I would build the knowledge access layer as a shared service that owns retrieval, permissions, versioning, and provenance while exposing outputs in forms different clients can use. Chat UIs need answer-ready evidence bundles. Backend agents may need structured documents, ranked passages, or deterministic lookup...

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