/**
 * config-loader.ts
 *
 * Hardcoded configuration loader for OptiPrune.
 *
 * Resolution order (first match wins):
 *   1. optiprune.json   – plain JSON
 *   2. optiprune.jsonc  – JSON with // and /* … *\/ comments + trailing commas
 *   3. optiprune.config.ts  – TypeScript ESM default export
 *   4. optiprune.config.js  – JavaScript ESM default export
 *   5. optiprune.config.mjs – JavaScript ESM default export
 *   6. package.json "optiprune" field
 *
 * All sources are normalised through `mergeConfig` so the rest of the
 * codebase only ever sees a fully-resolved `ResolvedOptions` object.
 */
import type { Config, ResolvedOptions } from "./types.js";
export declare const DEFAULT_CONFIG: ResolvedOptions;
/**
 * Load user configuration from the project root.
 *
 * The function is intentionally synchronous-first for JSON/JSONC sources so
 * that the config is available as early as possible in the analysis pipeline.
 * TypeScript/JS config files are loaded via jiti.
 */
export declare function loadConfig(rootDir: string): Promise<Config>;
/**
 * Merge a base `ResolvedOptions` with a user-supplied `Config`.
 */
export declare function mergeConfig(base: ResolvedOptions, userConfig: Config): ResolvedOptions;