Function tool_loop_stream 

pub fn tool_loop_stream<Ctx: LoopDepth + Send + Sync + 'static>(
    provider: Arc<dyn DynProvider>,
    registry: Arc<ToolRegistry<Ctx>>,
    params: ChatParams,
    config: ToolLoopConfig,
    ctx: Arc<Ctx>,
) -> ChatStream

Streaming variant of tool_loop.

Yields StreamEvents from each iteration. Between iterations (when executing tools), no events are emitted. The final StreamEvent::Done carries the stop reason from the last iteration.

Depth Tracking

If Ctx implements LoopDepth, nested calls are tracked automatically. When config.max_depth is set and the context’s depth exceeds the limit, yields Err(LlmError::MaxDepthExceeded) immediately.

Events

If config.on_event is set, the callback will be invoked with ToolLoopEvents at key points during execution, same as tool_loop.

Uses Arc for provider, registry, and context since they must outlive the returned stream.