aws.internal._wants_cache_point

(internal) The per-message metadata key that requests a Bedrock prompt-caching checkpoint after the message's content.

Reference version

Signature

function aws.internal._wants_cache_point(metadata: map<string, baml.json.json>) -> bool

(internal) The per-message metadata key that requests a Bedrock prompt-caching checkpoint after the message's content.

The engine emits {"cachePoint":{"type":"default"}} whenever a message carries cache_control metadata (engine/.../aws_client.rs:123-155). BAML's neutral spelling of that is a ai.PromptMessage.metadata entry, and Bedrock's own name for the feature is a cache point, so the key is cache_point — any non-null value (true is the idiomatic one) turns the checkpoint on.

NOTE: ai.internal.make_role currently builds every role marker with empty metadata, so nothing populates this yet from the prompt DSL. Until that lands, use the client's cache_system_prompt / cache_tools options, which do not depend on per-message metadata.

Source:<builtin>/aws/ns_internal/bedrock.bamlbytes 24381–24549