/**
 * MCP server transport type.
 * - 'stdio'           — spawn a child process (command + args)
 * - 'sse'             — connect to an SSE endpoint (url)
 * - 'streamable-http' — connect via streamable HTTP transport (url)
 */
export type LTMcpTransportType = 'stdio' | 'sse' | 'streamable-http';
/**
 * MCP server registration as stored in the database (snake_case).
 */
export interface LTMcpServerRecord {
    id: string;
    name: string;
    description: string | null;
    transport_type: LTMcpTransportType;
    transport_config: {
        /** For stdio: the command to spawn */
        command?: string;
        /** For stdio: arguments to the command */
        args?: string[];
        /** For stdio: environment variables to set */
        env?: Record<string, string>;
        /** For sse: the URL to connect to */
        url?: string;
    };
    /** Whether to auto-connect on startup */
    auto_connect: boolean;
    /** Cached tool manifest from last listTools() */
    tool_manifest: LTMcpToolManifest[] | null;
    metadata: Record<string, any> | null;
    /** Categorization tags for efficient tool discovery (e.g., ['database', 'analytics']) */
    tags: string[];
    /** Per-server hints injected into the YAML compilation prompt when this server's tools are used */
    compile_hints: string | null;
    /** Credential providers required by this server's tools (e.g., ['anthropic']) */
    credential_providers: string[];
    /** Capability category for grouping (e.g., 'Communication', 'Analysis', 'Data') */
    category: string | null;
    status: LTMcpServerStatus;
    last_connected_at: Date | null;
    created_at: Date;
    updated_at: Date;
}
export type LTMcpServerStatus = 'registered' | 'connected' | 'error' | 'disconnected';
/**
 * Cached tool manifest entry from listTools().
 */
export interface LTMcpToolManifest {
    name: string;
    description: string;
    inputSchema: Record<string, any>;
}
/**
 * MCP adapter interface. Follows the same pattern as
 * LTTelemetryAdapter (single-adapter, connect/disconnect).
 *
 * The adapter manages:
 * - One MCP server (human queue) exposing Long Tail escalations
 * - Multiple MCP client connections to external servers
 */
export interface LTMcpAdapter {
    /** Start the MCP server and connect all auto-connect clients */
    connect(): Promise<void>;
    /** Disconnect all clients and stop the server */
    disconnect(): Promise<void>;
    /** Connect to a registered MCP server by name or ID */
    connectClient(serverId: string): Promise<void>;
    /** Disconnect a specific client */
    disconnectClient(serverId: string): Promise<void>;
    /** List tools from a connected server */
    listTools(serverId: string): Promise<LTMcpToolManifest[]>;
    /** Call a tool on a connected server */
    callTool(serverId: string, toolName: string, args: Record<string, any>, authContext?: {
        userId?: string;
        delegationToken?: string;
    }): Promise<any>;
    /**
     * Return an object of tool functions suitable for
     * Durable.workflow.proxyActivities(). Each key is a tool name
     * and each value is an async function wrapping callTool().
     */
    toolActivities(serverId: string): Promise<Record<string, (...args: any[]) => Promise<any>>>;
}