/**
 * src/extension/hud.ts — minimal optional footer widget (stub fonctionnel):
 * a live summary of delegation runs. Safe string[] widget form only (Pi wraps
 * each line in a Text component and truncates itself). Transient — nothing is
 * persisted.
 *
 * Cycle-4 fixes: reconciled summary (every run lands in exactly one bucket —
 * active/complete/failed/preflight[/aborted/escalated] — so the counts add
 * up), the runtime `uptime` line replaced by ACTIVE-RUN durations (`N active
 * · longest 14s`, hidden when idle — no ever-growing idle counter), the
 * repaint diffed via WidgetPainter (idle = 0 repaints) and the periodic
 * refresh riding the SINGLE shared widget ticker instead of a private timer.
 */
import { type DelegationSummary } from "../engine/monitor.js";
import { type DelegationMonitorState } from "../engine/runs.js";
import type { GetRuntime } from "./tools.js";
import { type WidgetTicker } from "./widget-refresh.js";
import type { SessionContext } from "./pi-types.js";
export declare const HUD_WIDGET_ID = "pi-subagents-hud";
export declare const HUD_STATUS_ID = "subagents";
/** Active run count (queued + running + steered). */
export declare function activeRunCount(summary: DelegationSummary): number;
/**
 * Reconciled one-line summary: every run is counted in EXACTLY one bucket so
 * the numbers add up to the total — `N runs · N active · N complete ·
 * N failed · N preflight` (+ `N aborted` / `N escalated` only when nonzero).
 */
export declare function reconcileSummaryLine(summary: DelegationSummary): string;
/**
 * Active-run durations line (`N active · longest 14s`), replacing the old
 * runtime uptime. Undefined when no run is active (line hidden in idle).
 */
export declare function activeRunsDurationLine(state: DelegationMonitorState, now?: number): string | undefined;
/** Pure renderer — returns the widget lines for a runtime (injectable now). */
export declare function renderHudLines(getRuntime: GetRuntime, now?: number): string[] | undefined;
/** Small HUD owner: diffed widget refresh on the shared ticker (anti-flicker). */
export declare class SubagentsHud {
    private readonly getRuntime;
    private readonly ticker;
    private unsubscribe?;
    private readonly ctx;
    private readonly painter;
    constructor(ctx: SessionContext, getRuntime: GetRuntime, ticker?: WidgetTicker);
    attach(): void;
    detach(): void;
    /** Immediate refresh (event hook — called on pi.events lifecycle changes). */
    onLocalChange(): void;
    private refresh;
}