/**
 * Applies AG-UI intents to the widget's message state.
 *
 * The split is deliberate: `@/dynamic-ui/agui` decides *what a frame means* (pure, tested), and
 * this decides *what that does to the conversation* (Solid signals, widget callbacks). Without
 * it, `createChatSubmit`'s already-large SSE handler would gain a second protocol inline and the
 * wire contract would only be reachable through a live stream.
 *
 * Everything it writes lands on the last assistant message, the same row the legacy path writes,
 * so a turn that falls back to the legacy wire mid-flight still renders coherently.
 */
import type { AguiIntent } from '@/dynamic-ui';
import type { MessageType } from '@/widget/types';
type AguiStreamDeps = {
    /** Creates the streaming assistant row if the turn has not produced one yet. */
    ensureStreamMessage: () => void;
    flushText: () => void;
    updateLastBotMessage: (updater: (msg: MessageType) => MessageType, persist?: boolean) => void;
    updateMetadata: (data: any) => void;
    updateLastMessageSourceDocuments: (docs: any) => void;
    updateLastMessageArtifacts: (artifacts: any) => void;
    updateLastMessageFileAnnotations: (annotations: any) => void;
    updateLastMessageAgentReasoning: (reasoning: any) => void;
    updateAgentFlowEvent: (event: string) => void;
    updateAgentFlowExecutedData: (data: any) => void;
    updateLastMessageAction: (action: any) => void;
    onError: (message: string) => void;
    onFinished: () => void;
};
export declare function createAguiStream(deps: AguiStreamDeps): {
    apply: (intent: AguiIntent) => {
        textDelta?: string;
    };
    appendText: (delta: string) => void;
    finalize: (status?: 'done' | 'error') => void;
    isActive: () => boolean;
};
export {};