chore: import upstream snapshot with attribution

showcase/shared/starter-template/app/api/copilotkit/route.ts

@@ -0,0 +1,92 @@
+import { NextRequest, NextResponse } from "next/server";
+import {
+  CopilotRuntime,
+  ExperimentalEmptyAdapter,
+  copilotRuntimeNextJSAppRouterEndpoint,
+} from "@copilotkit/runtime";
+import { LangGraphAgent } from "@copilotkit/runtime/langgraph";
+
+const AGENT_URL =
+  process.env.AGENT_URL ||
+  process.env.LANGGRAPH_DEPLOYMENT_URL ||
+  "http://localhost:8123";
+
+if (!process.env.AGENT_URL && !process.env.LANGGRAPH_DEPLOYMENT_URL) {
+  console.warn(
+    "[copilotkit/route] WARNING: No AGENT_URL or LANGGRAPH_DEPLOYMENT_URL set, falling back to localhost:8123",
+  );
+}
+
+console.log("[copilotkit/route] Initializing CopilotKit runtime");
+console.log(`[copilotkit/route] AGENT_URL: ${AGENT_URL}`);
+
+function createAgent(graphId: string = "sample_agent") {
+  return new LangGraphAgent({
+    deploymentUrl: AGENT_URL,
+    graphId,
+    langsmithApiKey: process.env.LANGSMITH_API_KEY || "",
+  });
+}
+
+const agentNames = [
+  "sample_agent",
+  "agentic_chat",
+  "human_in_the_loop",
+  "tool-rendering",
+  "gen-ui-tool-based",
+  "gen-ui-agent",
+  "shared-state-read",
+  "shared-state-write",
+  "shared-state-streaming",
+  "subagents",
+  "default",
+];
+
+const agents: Record<string, LangGraphAgent> = {};
+for (const name of agentNames) {
+  agents[name] = createAgent();
+}
+
+export const POST = async (req: NextRequest) => {
+  try {
+    const { handleRequest } = copilotRuntimeNextJSAppRouterEndpoint({
+      endpoint: "/api/copilotkit",
+      serviceAdapter: new ExperimentalEmptyAdapter(),
+      runtime: new CopilotRuntime({
+        // @ts-expect-error -- type wrapping mismatch, fixed in source pending release
+        agents,
+      }),
+    });
+
+    return await handleRequest(req);
+  } catch (error: unknown) {
+    const message = error instanceof Error ? error.message : "Unknown error";
+    console.error("[copilotkit/route] ERROR:", error);
+    return NextResponse.json({ error: message }, { status: 500 });
+  }
+};
+
+export const GET = async () => {
+  let agentStatus = "unknown";
+  try {
+    const res = await fetch(`${AGENT_URL}/health`, {
+      signal: AbortSignal.timeout(3000),
+    });
+    agentStatus = res.ok ? "reachable" : `error (${res.status})`;
+  } catch (e: unknown) {
+    const msg = e instanceof Error ? e.message : String(e);
+    agentStatus = `unreachable (${msg})`;
+  }
+
+  const topStatus = agentStatus.startsWith("unreachable") ? "degraded" : "ok";
+
+  return NextResponse.json({
+    status: topStatus,
+    agent_url: AGENT_URL,
+    agent_status: agentStatus,
+    env: {
+      OPENAI_API_KEY: process.env.OPENAI_API_KEY ? "set" : "NOT SET",
+      NODE_ENV: process.env.NODE_ENV,
+    },
+  });
+};

showcase/shared/starter-template/app/api/health/route.ts

@@ -0,0 +1,9 @@
+import { NextResponse } from "next/server";
+
+export async function GET() {
+  return NextResponse.json({
+    status: "ok",
+    integration: "{{SLUG}}",
+    timestamp: new Date().toISOString(),
+  });
+}