import { PromptResult, Result, StreamChunk, ToolCallJSON, UserContentInput } from "smoltalk";
import type { RuntimeContext } from "./state/context.js";
import type { StateStack } from "./state/stateStack.js";
import { GraphState } from "./types.js";
export declare function isGenerator(variable: any): boolean;
export declare function handleStreamingResponse(args: {
    ctx: RuntimeContext<GraphState>;
    completion: AsyncGenerator<StreamChunk>;
    prompt: string | UserContentInput;
    /** The branch-local stack, if this call runs inside a fork/race branch.
     *  Used to discover scoped `callback("onStream")` registrations on the
     *  right frame chain — passed straight through to the callback machinery. */
    stateStack?: StateStack;
}): Promise<Result<{
    completion: PromptResult;
    toolCalls: ToolCallJSON[];
}> | undefined>;