/**
 * Plugin rule discovery: loads third-party {@link ScanRule}s from a directory
 * of ES module files. Each `.mjs` (or `.js`) file may export a single rule,
 * an array of rules, or a factory function returning either.
 */
import { ScanRule } from './types.js';
/** Default directory scanned for third-party rule plugins. */
export declare function getDefaultRulesDir(): string;
/** A rule exported by a plugin module, or a factory producing one. */
export type RuleModuleExport = ScanRule | ScanRule[] | (() => ScanRule | ScanRule[]);
/** Result of loading one plugin file. */
export interface LoadedRuleFile {
    /** Absolute path of the loaded file. */
    readonly filePath: string;
    /** Rules exported by the file. */
    readonly rules: ScanRule[];
}
/**
 * Load all rule plugin files from a directory.
 *
 * Files are read in lexical order so rule order is deterministic. Invalid
 * files are skipped — a broken plugin must not take down the whole scan.
 *
 * @param dir - Directory to scan for `*.mjs` / `*.js` rule files.
 * @returns Per-file load results for every successfully loaded file.
 */
export declare function loadRulesFromDirectory(dir?: string): Promise<LoadedRuleFile[]>;
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