/**
 * Plugin loader — dynamically imports plugin packages and extracts tool definitions.
 *
 * Plugins are npm packages or local paths that export a ToolPlugin object as their
 * default export. Each plugin contributes a set of ToolDefinition[] to the engine.
 */
import type { ToolDefinition } from '../mcp/tools.js';
/**
 * Load plugins by dynamic import and return a flat array of contributed tools.
 *
 * Each plugin module must have a default export conforming to ToolPlugin:
 *   { name: string, tools: ToolDefinition[] }
 *
 * Invalid plugins are skipped with a console warning (fail-open for resilience).
 * Duplicate tool names are detected and skipped with a warning.
 */
export declare function loadPlugins(pluginPaths: string[], coreToolNames?: Set<string>): Promise<ToolDefinition[]>;
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