Module stream 

LLM transport extension point.

StreamFn is the swappable boundary between the loop and any provider: real LLM API call (production), recorded-fixture replay (eval), scripted scenario (tests), remote proxy (gateway). One trait method, typed request/response.

The loop never imports a specific provider; the caller assembles a LoopConfig with a StreamFn implementation of their choice.

Structs

StreamRequest

Inputs for one LLM call.

StreamResponse

Final assembled response from one LLM call. Producers that don’t need fine-grained streaming can return a BoxStream that yields just one Done event.

ToolSchema

Tool schema as the provider sees it.

Enums

AssistantStreamChunk

One token-level chunk during streaming.

ReasoningEffort

Reasoning-effort levels accepted by every supported provider.

StreamErrorKind

Coarse classification of a stream error.

StreamEvent

Streamed event from the provider.

Traits

StreamFn

The transport trait. One method, typed in/out.