route.ts

/**
 * Dedicated runtime for the declarative-json-render demo.
 *
 * Splitting into its own endpoint (mirroring beautiful-chat +
 * declarative-gen-ui) keeps the `byoc_json_render` graph isolated from
 * the default multi-agent `/api/copilotkit` runtime. The frontend's
 * demo page (src/app/demos/declarative-json-render/page.tsx) points
 * `<CopilotKit runtimeUrl>` here. The Python module + langgraph graph
 * ID retain the legacy `byoc_json_render` name; only the user-facing
 * slug, route, and frontend folder were renamed.
 */

import { NextRequest, NextResponse } from "next/server";
import {
  CopilotRuntime,
  ExperimentalEmptyAdapter,
  copilotRuntimeNextJSAppRouterEndpoint,
} from "@copilotkit/runtime";
import { LangGraphAgent } from "@copilotkit/runtime/langgraph";

const LANGGRAPH_URL =
  process.env.LANGGRAPH_DEPLOYMENT_URL || "http://localhost:8123";

const byocJsonRenderAgent = new LangGraphAgent({
  deploymentUrl: LANGGRAPH_URL,
  graphId: "byoc_json_render",
  langsmithApiKey: process.env.LANGSMITH_API_KEY || "",
});

const runtime = new CopilotRuntime({
  // @ts-ignore -- same-shape mismatch as the other dedicated routes in this
  // package; the LangGraphAgent satisfies the runtime's agent interface at
  // runtime but the generics don't line up across the v1/v2 boundary.
  agents: { byoc_json_render: byocJsonRenderAgent },
});

export const POST = async (req: NextRequest) => {
  try {
    const { handleRequest } = copilotRuntimeNextJSAppRouterEndpoint({
      endpoint: "/api/copilotkit-declarative-json-render",
      serviceAdapter: new ExperimentalEmptyAdapter(),
      runtime,
    });
    return await handleRequest(req);
  } catch (error: unknown) {
    const e = error as { message?: string; stack?: string };
    return NextResponse.json(
      { error: e.message, stack: e.stack },
      { status: 500 },
    );
  }
};