/**
 * MCP stdio server for pi-exa.
 *
 * Exposes the same portable Exa tools that extensions/index.ts registers
 * with Pi. Tool enablement and API key resolution come from environment
 * variables (and the shared EXA_CONFIG_FILE shape from config.ts) rather
 * than Pi CLI flags. Precedence mirrors the Pi-side `isToolEnabledForConfig`:
 *
 *   1. EXA_ENABLED_TOOLS env (comma-separated allowlist) — overrides
 *      everything else when set. An EXA_ENABLED_TOOLS string that parses
 *      to an empty allowlist (e.g. ",,,") emits a warning and falls
 *      through to the per-tool toggle defaults.
 *   2. config file's `enabledTools` array — same allowlist semantics. An
 *      empty array means "no tools enabled" — matching the Pi adapter.
 *   3. Per-tool env toggles (EXA_ENABLE_ADVANCED, EXA_ENABLE_RESEARCH) and
 *      config file's advancedEnabled / researchEnabled.
 *   4. Default: 8 tools on (4 cheap Exa + 4 planner), 2 hidden
 *      (web_search_advanced_exa, web_research_exa).
 *
 * EXA_CONFIG is accepted as a deprecated alias for EXA_CONFIG_FILE.
 *
 * The module is strictly import-passive: it exports createMcpServerOptions
 * and runServer for callers. Stdio is started exclusively by bin/pi-exa.js,
 * which imports runServer() and invokes it explicitly. Tests import the
 * exports directly without any side effects.
 */
import { type CreateMcpServerOptions } from "@feniix/bridgekit/mcp";
import { type ExaConfig } from "./config.js";
import { type ExaToolTimeouts } from "./tools.js";
export declare function createMcpToolGater(config?: ExaConfig | null): (name: string) => boolean;
export declare function createMcpApiKeyResolver(config: ExaConfig | null): () => string | undefined;
/**
 * Build an ExaToolTimeouts object from EXA_TIMEOUT_MS (generic default) and
 * EXA_RESEARCH_TIMEOUT_MS (web_research_exa override). Returns undefined when
 * neither var is set or both fail to parse — letting createExaTools fall
 * through to its built-in per-tool defaults (60s / 180s).
 */
export declare function createMcpTimeoutsFromEnv(): ExaToolTimeouts | undefined;
export declare function createMcpServerOptions(): CreateMcpServerOptions;
type RunMcpStdioServer = (options: CreateMcpServerOptions) => Promise<void>;
export declare function runServer(runMcpStdioServer?: RunMcpStdioServer): Promise<void>;
export {};