Function resolve

packages/llm/src/cache-policy.ts:33–37

(policy: CachePolicy | undefined)

//   - "none"      → no auto placement; manual `CacheHint`s still flow.
//   - object form → exactly what the caller asked for.
const resolve = (policy: CachePolicy | undefined): CachePolicyObject => {
  if (policy === undefined || policy === "auto") return AUTO
  if (policy === "none") return NONE
  return policy
}

// Protocols whose wire format ignores inline cache markers (OpenAI's implicit
// prefix caching, Gemini's implicit + out-of-band CachedContent). Skip the