/**
 * Environment variable parsing and validation.
 * Reads required and optional config from process.env.
 */
import type { AppConfig } from "../types/index.js";
/**
 * Load and validate application config from environment variables.
 *
 * Required: PVE_BASE_URL, PVE_TOKEN_ID, PVE_TOKEN_SECRET
 * Optional: PVE_ACCESS_TIER (default: 'full'), PVE_CATEGORIES,
 *           PVE_VERIFY_SSL (default: 'true'), DEBUG
 *
 * Throws clear error (no credentials in message) if required vars are missing.
 */
export declare function loadConfig(): AppConfig;