import { ChildProcess } from 'node:child_process';
import { ExecPayload } from './schema.js';
export declare class IOController {
    private child;
    private payload;
    private cwd;
    private onStall;
    private onMaxBuffer;
    private isJson;
    private stdoutDecoder;
    private stderrDecoder;
    private _stdoutTail;
    private _stderrTail;
    private _lastParsedEnvelope;
    private pendingStdout;
    private _lastDataTime;
    get stdoutTail(): string;
    get stderrTail(): string;
    get lastDataTime(): number;
    getParsedEnvelope(): Record<string, unknown> | null;
    private finalizeStdout;
    private outStream?;
    private errStream?;
    private stallTimer;
    private promptStallTimer;
    private stdoutFlushTimer;
    private stderrFlushTimer;
    private isStdinBroken;
    private isStdinClosed;
    private streamManager;
    constructor(child: ChildProcess, payload: ExecPayload, cwd: string, onStall: (reason: string) => void, onMaxBuffer: (reason: string) => void, isJson?: boolean);
    setupStreams(): void;
    private setupFileStreams;
    private setupStdin;
    private safelyPauseAndDrain;
    private resetStallTimer;
    private hasTuiSequence;
    private evaluatePromptStall;
    private scheduleStreamFlush;
    private processData;
    private processEnd;
    private bindStdout;
    private bindStderr;
    flushAll(): void;
    closeFileStreams(): Promise<void>;
    destroyStreams(): void;
}
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