import { InterruptSubmissionError } from '../interrupts.js';
import { ContentPart, StreamChunk, ToolOutputState } from '../types.js';
/**
 * Adapter / engine yield before normalize. Public StreamChunk is spec-only.
 * This type still allows the old extra fields.
 */
export type AdapterYieldChunk = StreamChunk & {
    model?: string;
    finishReason?: 'stop' | 'length' | 'content_filter' | 'tool_calls' | null;
    usage?: any;
    content?: string;
    args?: string;
    toolName?: string;
    toolCallName?: string;
    index?: number;
    input?: unknown;
    output?: unknown;
    result?: string | Array<ContentPart>;
    state?: ToolOutputState | Record<string, unknown>;
    stepId?: string;
    stepType?: string;
    delta?: string | ReadonlyArray<unknown>;
    signature?: string;
    error?: {
        message: string;
        code?: string;
    };
    'tanstack:interruptErrors'?: ReadonlyArray<InterruptSubmissionError>;
    threadId?: string;
    runId?: string;
};