/**
 * Pure watch snapshot renderer. Converts RunMetrics into a compact,
 * live-dashboard string for `diablo watch`. No I/O — unit-tested directly.
 *
 * Icons: ✓ done, ▶ running, ○ pending, ⚠ halted
 */
import type { RunMetrics } from "./run-metrics.ts";
export interface WatchSnapshotOpts {
    colour: boolean;
    /** Override "now" for testability; defaults to new Date(). */
    now?: Date;
}
/**
 * Render a watch snapshot from aggregated run metrics.
 * Pure — no I/O.
 */
export declare function renderWatchSnapshot(m: RunMetrics, opts: WatchSnapshotOpts): string;