/**
 * AG-UI SSE Events Route
 *
 * GET /events/ag-ui - Server-Sent Events stream for AG-UI protocol clients.
 *
 * Provides AG-UI protocol compatibility while preserving Gizmo's observability.
 * Events are generated by the ag-ui-adapter-plugin and emitted via EventEmitter.
 */
import { Hono } from "hono";
import type { Runtime, Action } from "@gizmo-ai/runtime";
import type { EventEmitter } from "events";
export interface AGUIEventsRouteConfig<S extends Record<string, unknown>, A extends Action> {
    /**
     * Runtime instance
     */
    runtime: Runtime<S, A>;
    /**
     * EventEmitter from ag-ui-adapter-plugin
     * Should be the same bus passed to agUIAdapterPlugin()
     */
    bus: EventEmitter;
    /**
     * Which state slices to include in STATE_SNAPSHOT
     * Default: ['agent'] (only agent slice)
     */
    slices?: string[];
    /**
     * Heartbeat interval in milliseconds
     * Default: 30000 (30 seconds)
     */
    heartbeatInterval?: number;
    /**
     * JSON serializer function
     */
    serializer: (value: unknown) => string;
}
/**
 * Create the AG-UI SSE events route
 *
 * This route provides AG-UI protocol compatibility for frontend clients.
 * It streams AG-UI events (RunStarted, TextMessageContent, ToolCallStart, etc.)
 * and STATE_DELTA events with RFC 6902 JSON Patch operations.
 *
 * @example
 * ```typescript
 * import { createAGUIEventsRoute } from "@gizmo-ai/server";
 * import { agUIAdapterPlugin } from "@gizmo-ai/ag-ui-adapter-plugin";
 *
 * const adapter = agUIAdapterPlugin();
 * const aguiRoute = createAGUIEventsRoute({
 *   runtime,
 *   bus: adapter.bus,
 *   serializer: JSON.stringify,
 * });
 *
 * app.route("/events/ag-ui", aguiRoute);
 * ```
 */
export declare function createAGUIEventsRoute<S extends Record<string, unknown>, A extends Action>(config: AGUIEventsRouteConfig<S, A>): Hono;
/**
 * Helper to check if AG-UI adapter plugin is configured
 *
 * @param runtime - Runtime instance
 * @returns True if ag-ui-adapter-plugin is present
 */
export declare function hasAGUIAdapter<S extends Record<string, unknown>>(runtime: Runtime<S, Action>): boolean;
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