Core answer
Start here. This is the direct spoken answer to practice first.
Overview
Caching can save substantial latency and cost, but a wrong shared answer can become a data exposure.
I cache deterministic or repeatable intermediate results first, such as tokenization, approved static context, embeddings for unchanged content, or exact responses whose full inputs and policy are identical. Cache keys include model, prompt, schema, context, authorization scope, and other behavior-changing versions. Sensitive or user-specific results are isolated or not cached, and every entry has a freshness and deletion policy.