/**
 * MCP over HTTP
 *
 * Mounts the CodraGraph MCP server on Express using StreamableHTTP transport.
 * Each connecting client gets its own stateful session; the LocalBackend
 * is shared across all sessions (thread-safe — lazy LadybugDB per repo).
 *
 * Sessions are cleaned up on explicit close or after SESSION_TTL_MS of inactivity
 * (guards against network drops that never trigger onclose).
 */
import type { Express } from 'express';
import type { LocalBackend } from '../mcp/local/local-backend.js';
export declare const MCP_HTTP_ENDPOINT = "/api/mcp";
export declare const UNSUPPORTED_MCP_REST_EXAMPLE = "/api/mcp/tools/list";
export interface McpHttpRouteGuidance {
    endpoint: string;
    transport: 'streamable-http';
    note: string;
    unsupportedRestExample: string;
    powershellHealthCheck: string;
    clientInstruction: string;
}
export declare const getMcpHttpRouteGuidance: () => McpHttpRouteGuidance;
export declare const getUnsupportedMcpRestRouteResponse: (path: string) => {
    endpoint: string;
    transport: "streamable-http";
    note: string;
    unsupportedRestExample: string;
    powershellHealthCheck: string;
    clientInstruction: string;
    error: string;
    code: string;
    unsupportedRoute: string;
};
export declare function mountMCPEndpoints(app: Express, backend: LocalBackend): () => Promise<void>;