feat(models): add Vercel AI Gateway provider

src/config/schema.test.ts

@@ -169,6 +169,16 @@ describe('configSchema — models auth_mode', () => {
       });
     }).toThrow(/auth_mode/i);
   });
+
+  it('accepts vercel provider id', () => {
+    const result = configSchema.parse({
+      ...minimalConfig,
+      models: {
+        default: { provider: 'vercel', model: 'openai/gpt-4.1', endpoint: 'https://ai-gateway.vercel.sh/v1', api_key: 'test-key' },
+      },
+    });
+    expect(result.models.default.provider).toBe('vercel');
+  });
 });
 
 describe('configSchema — skills watcher', () => {