/** Whether a pseudo-terminal can be allocated on this machine. */
export declare function ptyAvailable(): boolean;
export interface PtyRunOpts {
    /** Resolved executable (see resolveBin) run WITHOUT a shell. */
    file: string;
    args?: string[];
    cwd?: string;
    env?: NodeJS.ProcessEnv;
    /** Hard kill after this many minutes; resolves exit code 124 (session cap). */
    timeoutMin?: number;
    /** Called per output line. A pty has no separate stderr - level is always 'stdout'. */
    onLine?: (line: string, level: 'stdout' | 'stderr') => void;
}
export interface PtyRunResult {
    /** Process exit code, or 124 when killed by the timeout cap. */
    code: number;
    /** Full transcript, ANSI stripped, newlines normalized. */
    output: string;
}
/**
 * Run a resolved binary through a fresh pseudo-terminal, tee every line to
 * `onLine`, and resolve with the exit code + full cleaned transcript.
 * A pty multiplexes stdout/stderr into one stream, hence the single level.
 */
export declare function runAgyPty(opts: PtyRunOpts): Promise<PtyRunResult>;