fix: set default AGENT_BASE_URL to production doc-agents URL (#345)

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: srith@agentuity.com <rithsenghorn@gmail.com>

Author: devin-ai-integration[bot]

lib/config.ts

@@ -3,9 +3,11 @@
  * Contains non-secret configuration values
  */
 
+const DEFAULT_AGENT_BASE_URL = 'https://p0f83a312791b60ff.agentuity.run';
+
 export const config = {
     kvStoreName: 'docs-sandbox-chat-sessions',
-    // V1 Agent endpoints - must be set via AGENT_BASE_URL env var
-    agentBaseUrl: process.env.AGENT_BASE_URL,
+    // V1 Agent endpoints - defaults to production doc-agents URL
+    agentBaseUrl: process.env.AGENT_BASE_URL || DEFAULT_AGENT_BASE_URL,
     agentuityRegion: 'use',
 } as const;

middleware.ts

@@ -15,8 +15,9 @@ const TYPE_MAP: Record<string, string> = {
 const COOKIE_NAME = 'chat_user_id';
 const COOKIE_MAX_AGE = 24 * 60 * 60 * 14; // 14 days
 
-// Agentuity backend config (no fallbacks - must be set explicitly)
-const AGENT_BASE_URL = process.env.AGENT_BASE_URL;
+// Agentuity backend config
+const DEFAULT_AGENT_BASE_URL = 'https://p0f83a312791b60ff.agentuity.run';
+const AGENT_BASE_URL = process.env.AGENT_BASE_URL || DEFAULT_AGENT_BASE_URL;
 const AGENT_BEARER_TOKEN = process.env.AGENT_BEARER_TOKEN;
 
 export function middleware(request: NextRequest) {
@@ -31,14 +32,11 @@ export function middleware(request: NextRequest) {
 
 	// Proxy API requests to Agentuity backend with bearer token
 	if (pathname.startsWith('/api/sessions') || pathname === '/api/agent_pulse' || pathname === '/api/doc-qa') {
-		const missingVars = [];
-		if (!AGENT_BASE_URL) missingVars.push('AGENT_BASE_URL');
-		if (!AGENT_BEARER_TOKEN) missingVars.push('AGENT_BEARER_TOKEN');
-
-		if (missingVars.length > 0) {
-			console.error(`[middleware] Missing required env vars: ${missingVars.join(', ')}`);
+		// AGENT_BEARER_TOKEN is required for authenticated endpoints
+		if (!AGENT_BEARER_TOKEN) {
+			console.error('[middleware] Missing required env var: AGENT_BEARER_TOKEN');
 			return NextResponse.json(
-				{ error: `Server misconfigured: missing ${missingVars.join(', ')}` },
+				{ error: 'Server misconfigured: missing AGENT_BEARER_TOKEN' },
 				{ status: 503 }
 			);
 		}