/**
 * Zoe Core — Semantic Tool Injection Middleware
 *
 * Scores the user's last message against all gateway-discovered tools
 * and injects the top-K most relevant directly into ctx.toolDefs.
 * Falls through to proxy pattern when no matches found.
 */
import type { Middleware } from '../middleware.js';
import type { MCPGateway } from '../../gateway/gateway.js';
export declare function semanticToolInjectionMiddleware(gateway: MCPGateway, topK?: number): Middleware;