> ## Documentation Index > Fetch the complete documentation index at: https://openrouter.ai/docs/llms.txt > Use this file to discover all available pages before exploring further. # AnthropicCacheControlDirectiveType ## Example Usage ```typescript theme={null} import { AnthropicCacheControlDirectiveType } from "@openrouter/sdk/models"; let value: AnthropicCacheControlDirectiveType = "ephemeral"; ``` ## Values ```typescript theme={null} "ephemeral" ```