export declare const RUNNER_CONTROL_PREFIX = "\u001B]777;botmux:";
export declare const RUNNER_CONTROL_END = "\u0007";
export declare const MAX_RUNNER_CONTROL_BYTES: number;
/** Runner display text is model/user/tool controlled and shares a PTY byte
 * stream with botmux OSC control frames. Escaping every ESC byte makes the
 * separation structural and naturally safe across arbitrary delta chunks. */
export declare function escapeRunnerDisplay(value: unknown): string;
type WriteChunk = (chunk: string) => unknown;
/** The only producer allowed to write a raw botmux OSC prefix. */
export declare class RunnerControlWriter {
    private readonly stdout;
    private readonly stderr;
    constructor(stdout?: WriteChunk, stderr?: WriteChunk);
    display(value: unknown): void;
    line(value?: unknown): void;
    error(value: unknown): void;
    marker(kind: string, payload: unknown): void;
}
/** Stateful decoder for control frames that may be split across PTY chunks.
 * Oversized/unterminated candidates are rendered inert instead of buffering
 * without bound or invoking a partial control message. */
export declare class RunnerControlDecoder {
    private readonly maxControlBytes;
    private pending;
    constructor(maxControlBytes?: number);
    push(data: string, enabled: boolean, onMarker: (body: string) => void): string;
    reset(): void;
    /** Test/diagnostic visibility only; never expose pending control bytes. */
    pendingBytes(): number;
}
export {};
//# sourceMappingURL=runner-control-channel.d.ts.map