fix(auth): resolve /api/v1/auth/config 404 on Vercel deployment

packages/adapters/hono/src/index.ts

@@ -259,6 +259,28 @@ export function createHonoApp(options: ObjectStackHonoOptions): Hono {
         authService = null;
       }
 
+      // Handle /auth/config endpoint specifically (not handled by better-auth)
+      if (path === 'config' && method === 'GET' && authService) {
+        try {
+          const config = (authService as any).getPublicConfig?.();
+          if (config) {
+            return c.json({
+              success: true,
+              data: config,
+            });
+          }
+        } catch (error) {
+          const err = error instanceof Error ? error : new Error(String(error));
+          return c.json({
+            success: false,
+            error: {
+              code: 'auth_config_error',
+              message: err.message,
+            },
+          }, 500);
+        }
+      }
+
       if (authService && typeof authService.handleRequest === 'function') {
         const response = await authService.handleRequest(c.req.raw);
         return new Response(response.body, {

packages/plugins/plugin-auth/src/auth-manager.test.ts

@@ -815,11 +815,13 @@ describe('AuthManager', () => {
         id: 'google',
         name: 'Google',
         enabled: true,
+        type: 'social',
       });
       expect(config.socialProviders[1]).toEqual({
         id: 'github',
         name: 'GitHub',
         enabled: true,
+        type: 'social',
       });
 
       // Should NOT include sensitive data
@@ -899,6 +901,7 @@ describe('AuthManager', () => {
         id: 'customProvider',
         name: 'CustomProvider',
         enabled: true,
+        type: 'social',
       });
     });
   });

packages/plugins/plugin-auth/src/auth-plugin.ts

@@ -246,27 +246,11 @@ export class AuthPlugin implements Plugin {
 
     const rawApp = (httpServer as any).getRawApp();
 
-    // Register auth config endpoint - public endpoint for frontend discovery
-    rawApp.get(`${basePath}/config`, async (c: any) => {
-      try {
-        const config = this.authManager!.getPublicConfig();
-        return c.json({
-          success: true,
-          data: config,
-        });
-      } catch (error) {
-        const err = error instanceof Error ? error : new Error(String(error));
-        ctx.logger.error('Auth config error:', err);
-
-        return c.json({
-          success: false,
-          error: {
-            code: 'auth_config_error',
-            message: err.message,
-          },
-        }, 500);
-      }
-    });
+    // NOTE: The `/config` endpoint is now handled in the Hono adapter itself
+    // (packages/adapters/hono/src/index.ts) to avoid route ordering conflicts.
+    // The adapter's catch-all `/auth/*` route intercepts all auth requests
+    // before plugin routes can be registered, so we check for `/config` there
+    // and call getPublicConfig() directly on the auth service.
 
     // Register wildcard route to forward all auth requests to better-auth.
     // better-auth is configured with basePath matching our route prefix, so we