/**
 * SKC HUD - State Management
 *
 * Manages HUD state file for background task tracking.
 * Follows patterns from ultrawork-state.
 */
import type { SkcHudState, BackgroundTask, HudConfig } from './types.js';
/**
 * Read HUD state from disk (checks new local and legacy local only)
 */
export declare function readHudState(directory?: string): SkcHudState | null;
/**
 * Write HUD state to disk (local only)
 */
export declare function writeHudState(state: SkcHudState, directory?: string): boolean;
/**
 * Create a new empty HUD state
 */
export declare function createEmptyHudState(): SkcHudState;
/**
 * Get running background tasks from state
 */
export declare function getRunningTasks(state: SkcHudState | null): BackgroundTask[];
/**
 * Get background task count string (e.g., "3/5")
 */
export declare function getBackgroundTaskCount(state: SkcHudState | null): {
    running: number;
    max: number;
};
/**
 * Read HUD configuration from disk.
 * Priority: settings.json > hud-config.json (legacy) > defaults
 */
export declare function readHudConfig(): HudConfig;
/**
 * Write HUD configuration to ~/.claude/settings.json (skcHud key)
 */
export declare function writeHudConfig(config: HudConfig): boolean;
/**
 * Apply a preset to the configuration
 */
export declare function applyPreset(preset: HudConfig['preset']): HudConfig;
/**
 * Initialize HUD state with cleanup of stale/orphaned tasks.
 * Should be called on HUD startup.
 */
export declare function initializeHUDState(): Promise<void>;
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