/**
 * Plugin Discovery - Automatic discovery of evaluator plugins from npm packages
 *
 * Scans node_modules for packages that declare evaluators in their package.json:
 *
 * ```json
 * {
 *   "name": "praisonaibench-python",
 *   "praisonaibench": {
 *     "evaluators": {
 *       "python": "./dist/evaluator.js"
 *     }
 *   }
 * }
 * ```
 */
import { BaseEvaluator } from './base-evaluator';
export interface PluginInfo {
    packageName: string;
    language: string;
    evaluatorPath: string;
    evaluatorClass?: new () => BaseEvaluator;
}
export interface PluginPackageJson {
    name: string;
    praisonaibench?: {
        evaluators?: Record<string, string>;
    };
}
/**
 * Discover evaluator plugins from installed npm packages.
 *
 * Looks for packages with a "praisonaibench.evaluators" field in package.json.
 *
 * @param searchPaths - Additional paths to search for node_modules
 * @returns Array of discovered plugin information
 */
export declare function discoverPlugins(searchPaths?: string[]): PluginInfo[];
/**
 * Load an evaluator class from a plugin.
 *
 * @param plugin - Plugin information
 * @returns The evaluator class constructor, or undefined if loading fails
 */
export declare function loadEvaluatorClass(plugin: PluginInfo): (new () => BaseEvaluator) | undefined;
/**
 * Validate that an object is a valid evaluator instance.
 */
export declare function isValidEvaluator(obj: unknown): obj is BaseEvaluator;
/**
 * Get plugin info for a specific package by name.
 */
export declare function getPluginInfo(packageName: string): PluginInfo[];
/**
 * List all discovered plugin packages.
 */
export declare function listPluginPackages(): string[];
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