import type { JobTextChunk, JobTextSource } from "./types.js";
/**
 * Text appended over time and kept as its newest `capacity` UTF-16 units,
 * readable from any retained offset: a bash job's own output, or a
 * subagent's finished tool results.
 */
export declare class TextTap implements JobTextSource {
    #private;
    readonly id: string;
    readonly label: string;
    constructor(id: string, label: string, capacity?: number);
    append(text: string): void;
    /** No more text will arrive. */
    close(): void;
    read(from: number): JobTextChunk;
}