package ocaml-ai-sdk

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Module Ai_provider_openrouter.Cache_controlSource

Prompt caching control for OpenRouter requests.

Mirrors the per-part cache_control shape used by upstream @openrouter/ai-sdk-provider. The upstream TypeScript type is { type: 'ephemeral' } (see src/chat/convert-to-openrouter-chat-messages.ts); the OpenRouter documentation additionally accepts an optional ttl field ("5m" default, "1h" explicit) for Anthropic upstreams, which we surface here.

Sourcetype breakpoint =
  1. | Ephemeral
    (*

    Cache control type. Currently only Ephemeral is supported.

    *)
Sourcetype ttl =
  1. | Ttl_5m
  2. | Ttl_1h

Cache TTL. OpenRouter (Anthropic upstreams) accepts "5m" (default) or "1h".

Sourcetype t = {
  1. cache_type : breakpoint;
  2. ttl : ttl option;
}
Sourceval ephemeral : t

Ephemeral cache control with default 5-minute TTL.

Sourceval ephemeral_1h : t

Ephemeral cache control with explicit 1-hour TTL.

Sourceval to_json : t -> Yojson.Basic.t
Sourceval of_json : Yojson.Basic.t -> t