[codex] proxy provider model fetches (#777)

* proxy provider model fetches

* add provider model proxy e2e

tests/e2e/fixtures.ts

@@ -143,6 +143,11 @@ export async function mockHermesApi(page: Page, options: MockHermesApiOptions =
       return
     }
 
+    if (pathname === '/api/hermes/provider-models') {
+      await route.fulfill(jsonResponse({ models: ['proxy-model-a', 'proxy-model-b'] }))
+      return
+    }
+
     if (pathname === '/api/hermes/profiles') {
       await route.fulfill(jsonResponse({
         profiles: [

tests/e2e/provider-models.spec.ts

@@ -0,0 +1,37 @@
+import { expect, test } from '@playwright/test'
+import { authenticate, mockHermesApi, TEST_ACCESS_KEY } from './fixtures'
+
+test('fetches custom provider models through the backend proxy', async ({ page }) => {
+  await authenticate(page, TEST_ACCESS_KEY)
+  const api = await mockHermesApi(page)
+
+  const thirdPartyRequests: string[] = []
+  page.on('request', (request) => {
+    const url = request.url()
+    if (url.startsWith('https://provider.example.test')) {
+      thirdPartyRequests.push(url)
+    }
+  })
+
+  await page.goto('/#/hermes/models')
+
+  await page.getByRole('button', { name: 'Add Provider' }).click()
+  await page.getByRole('button', { name: 'Custom' }).click()
+  await page.getByPlaceholder('e.g. https://api.example.com/v1').fill('https://provider.example.test/v1')
+  await page.getByPlaceholder('sk-...').fill('test-provider-key')
+  await page.getByRole('button', { name: 'Fetch' }).click()
+
+  await expect(page.getByText('Found 2 models')).toBeVisible()
+  await expect(page.getByText('proxy-model-a')).toBeVisible()
+
+  const proxyRequest = api.requests.find((request) => request.pathname === '/api/hermes/provider-models')
+  expect(proxyRequest).toBeTruthy()
+  expect(proxyRequest?.method).toBe('POST')
+  expect(proxyRequest?.headers.authorization).toBe(`Bearer ${TEST_ACCESS_KEY}`)
+  expect(JSON.parse(proxyRequest?.postData || '{}')).toMatchObject({
+    base_url: 'https://provider.example.test/v1',
+    api_key: 'test-provider-key',
+  })
+  expect(thirdPartyRequests).toEqual([])
+  expect(api.unexpectedRequests).toEqual([])
+})