fix: type browser pool acquire timeout as null

src/resources/browser-pools.ts

@@ -119,7 +119,7 @@ export class BrowserPools extends APIResource {
     idOrName: string,
     body: BrowserPoolAcquireParams,
     options?: RequestOptions,
-  ): APIPromise<BrowserPoolAcquireResponse> {
+  ): APIPromise<BrowserPoolAcquireResponse | null> {
     return this._client.post(path`/browser_pools/${idOrName}/acquire`, { body, ...options });
   }
 

tests/api-resources/browser-pools-acquire.test.ts

@@ -0,0 +1,33 @@
+import Kernel, { NotFoundError } from '@onkernel/sdk';
+
+describe('browser pool acquire responses', () => {
+  test('returns the browser on a 200', async () => {
+    const client = new Kernel({
+      apiKey: 'test',
+      fetch: async () => Response.json({ session_id: 'session-1' }),
+    });
+
+    const result = await client.browserPools.acquire('pool', {});
+
+    expect(result?.session_id).toBe('session-1');
+  });
+
+  test('returns null on a 204 without retrying', async () => {
+    const fetch = jest.fn(async () => new Response(null, { status: 204 }));
+    const client = new Kernel({ apiKey: 'test', fetch });
+
+    const result = await client.browserPools.acquire('pool', {});
+
+    expect(result).toBeNull();
+    expect(fetch).toHaveBeenCalledTimes(1);
+  });
+
+  test('preserves the typed 404 error', async () => {
+    const client = new Kernel({
+      apiKey: 'test',
+      fetch: async () => Response.json({ code: 'not_found' }, { status: 404 }),
+    });
+
+    await expect(client.browserPools.acquire('missing', {})).rejects.toBeInstanceOf(NotFoundError);
+  });
+});