import type { OutputEvent, SubagentProgressMeta } from '../../../agent/types.js';
import type { ToolResultChunk, ToolUseDetailChunk } from '../../../agent/types/message-types.js';
import type { CompletionWriter } from './shared.js';
import type { TurnTtfbState } from './turn-handler.ttfb.js';
export declare class PlainTurnHooks {
    private readonly state;
    private readonly writer;
    private readonly ttfb;
    constructor(writer: CompletionWriter, ttfb: TurnTtfbState);
    onToolStart(chunk: ToolUseDetailChunk): void;
    onToolResult(chunk: ToolResultChunk, toolName: string | undefined): void;
    onSubagentEvent(event: OutputEvent, meta: SubagentProgressMeta): void;
    onFirstContent(stdout: NodeJS.WriteStream): void;
}