/**
 * Internal progress UI primitives shared by the console reporter.
 * Not part of the public package API — exported only via the relative
 * import inside `eval-console.ts`. Kept here (rather than in
 * `packages/cli/src/parallel.ts`) so the console reporter is
 * self-contained and the CLI no longer needs to inject UI utilities.
 */
export interface OutputMutex {
    acquire(): Promise<() => void>;
}
/** Async mutex. `acquire()` resolves to a release function. */
export declare function createOutputMutex(): OutputMutex;
export declare class Spinner {
    private frameIndex;
    private timer;
    private text;
    private detailLines;
    private renderedLineCount;
    private readonly isTTY;
    private readonly stream;
    constructor(stream?: NodeJS.WriteStream);
    start(text?: string): void;
    update(text: string): void;
    setLines(lines: string[]): void;
    /** Temporarily clear the spinner block, run `fn`, then restore. */
    suspend<T>(fn: () => T | Promise<T>): Promise<T>;
    stop(): void;
    private clearRenderedBlock;
    private render;
}
export interface TableRow {
    index: number;
    name: string;
    trial?: string;
    status: string;
}
export declare function formatStatusTable(rows: TableRow[]): string[];
export declare function formatProgressBar(completed: number, total: number, width?: number): string;
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