fix retry Codex and OpenAI fetches via proxy-aware helper (#720)

src/services/api/codexShim.ts

@@ -1,4 +1,5 @@
 import { APIError } from '@anthropic-ai/sdk'
+import { fetchWithProxyRetry } from './fetchWithProxyRetry.js'
 import type {
   ResolvedCodexCredentials,
   ResolvedProviderRequest,
@@ -559,12 +560,15 @@ export async function performCodexRequest(options: {
   }
   headers.originator ??= 'openclaude'
 
-  const response = await fetch(`${options.request.baseUrl}/responses`, {
-    method: 'POST',
-    headers,
-    body: JSON.stringify(body),
-    signal: options.signal,
-  })
+  const response = await fetchWithProxyRetry(
+    `${options.request.baseUrl}/responses`,
+    {
+      method: 'POST',
+      headers,
+      body: JSON.stringify(body),
+      signal: options.signal,
+    },
+  )
 
   if (!response.ok) {
     const errorBody = await response.text().catch(() => 'unknown error')

src/services/api/fetchWithProxyRetry.test.ts

@@ -0,0 +1,86 @@
+import { afterEach, beforeEach, expect, test } from 'bun:test'
+
+import { _resetKeepAliveForTesting } from '../../utils/proxy.js'
+import {
+  fetchWithProxyRetry,
+  isRetryableFetchError,
+} from './fetchWithProxyRetry.js'
+
+type FetchType = typeof globalThis.fetch
+
+const originalFetch = globalThis.fetch
+const originalEnv = {
+  HTTP_PROXY: process.env.HTTP_PROXY,
+  HTTPS_PROXY: process.env.HTTPS_PROXY,
+}
+
+function restoreEnv(key: 'HTTP_PROXY' | 'HTTPS_PROXY', value: string | undefined): void {
+  if (value === undefined) {
+    delete process.env[key]
+  } else {
+    process.env[key] = value
+  }
+}
+
+beforeEach(() => {
+  process.env.HTTP_PROXY = 'http://127.0.0.1:15236'
+  delete process.env.HTTPS_PROXY
+  _resetKeepAliveForTesting()
+})
+
+afterEach(() => {
+  globalThis.fetch = originalFetch
+  restoreEnv('HTTP_PROXY', originalEnv.HTTP_PROXY)
+  restoreEnv('HTTPS_PROXY', originalEnv.HTTPS_PROXY)
+  _resetKeepAliveForTesting()
+})
+
+test('isRetryableFetchError matches Bun socket-closed failures', () => {
+  expect(
+    isRetryableFetchError(
+      new Error(
+        'The socket connection was closed unexpectedly. For more information, pass `verbose: true` in the second argument to fetch()',
+      ),
+    ),
+  ).toBe(true)
+})
+
+test('fetchWithProxyRetry retries once with keepalive disabled after socket closure', async () => {
+  const calls: Array<RequestInit | undefined> = []
+
+  globalThis.fetch = (async (_input, init) => {
+    calls.push(init)
+    if (calls.length === 1) {
+      throw new Error(
+        'The socket connection was closed unexpectedly. For more information, pass `verbose: true` in the second argument to fetch()',
+      )
+    }
+    return new Response('ok')
+  }) as FetchType
+
+  const response = await fetchWithProxyRetry('https://example.com/search', {
+    method: 'POST',
+  })
+
+  expect(await response.text()).toBe('ok')
+  expect(calls).toHaveLength(2)
+  expect((calls[0] as RequestInit & { proxy?: string }).proxy).toBe(
+    'http://127.0.0.1:15236',
+  )
+  expect((calls[0] as RequestInit).keepalive).toBeUndefined()
+  expect((calls[1] as RequestInit).keepalive).toBe(false)
+})
+
+test('fetchWithProxyRetry does not retry non-network errors', async () => {
+  let attempts = 0
+
+  globalThis.fetch = (async () => {
+    attempts += 1
+    throw new Error('400 bad request')
+  }) as FetchType
+
+  await expect(fetchWithProxyRetry('https://example.com')).rejects.toThrow(
+    '400 bad request',
+  )
+  expect(attempts).toBe(1)
+})

src/services/api/fetchWithProxyRetry.ts

@@ -0,0 +1,44 @@
+import { disableKeepAlive, getProxyFetchOptions } from '../../utils/proxy.js'
+
+const RETRYABLE_FETCH_ERROR_PATTERN =
+  /socket connection was closed unexpectedly|ECONNRESET|EPIPE|socket hang up|Connection reset by peer|fetch failed/i
+
+export function isRetryableFetchError(error: unknown): boolean {
+  if (!(error instanceof Error)) {
+    return false
+  }
+  if (error.name === 'AbortError') {
+    return false
+  }
+  return RETRYABLE_FETCH_ERROR_PATTERN.test(error.message)
+}
+
+export async function fetchWithProxyRetry(
+  input: string | URL | Request,
+  init?: RequestInit,
+  options?: { forAnthropicAPI?: boolean; maxAttempts?: number },
+): Promise<Response> {
+  const maxAttempts = Math.max(1, options?.maxAttempts ?? 2)
+  let lastError: unknown
+
+  for (let attempt = 1; attempt <= maxAttempts; attempt++) {
+    try {
+      return await fetch(input, {
+        ...init,
+        ...getProxyFetchOptions({
+          forAnthropicAPI: options?.forAnthropicAPI,
+        }),
+      })
+    } catch (error) {
+      lastError = error
+      if (attempt >= maxAttempts || !isRetryableFetchError(error)) {
+        throw error
+      }
+      disableKeepAlive()
+    }
+  }
+
+  throw lastError instanceof Error
+    ? lastError
+    : new Error('Fetch failed without an error object')
+}

src/services/api/openaiShim.ts

@@ -47,6 +47,7 @@ import {
   type AnthropicUsage,
   type ShimCreateParams,
 } from './codexShim.js'
+import { fetchWithProxyRetry } from './fetchWithProxyRetry.js'
 import {
   isLocalProviderUrl,
   resolveRuntimeCodexCredentials,
@@ -1431,7 +1432,7 @@ class OpenAIShimMessages {
     const maxAttempts = isGithub ? GITHUB_429_MAX_RETRIES : 1
     let response: Response | undefined
     for (let attempt = 0; attempt < maxAttempts; attempt++) {
-      response = await fetch(chatCompletionsUrl, fetchInit)
+      response = await fetchWithProxyRetry(chatCompletionsUrl, fetchInit)
       if (response.ok) {
         return response
       }
@@ -1504,7 +1505,7 @@ class OpenAIShimMessages {
             }
           }
 
-          const responsesResponse = await fetch(responsesUrl, {
+          const responsesResponse = await fetchWithProxyRetry(responsesUrl, {
             method: 'POST',
             headers,
             body: JSON.stringify(responsesBody),

src/tools/WebSearchTool/WebSearchTool.ts

@@ -9,6 +9,7 @@ import { z } from 'zod/v4'
 import { getFeatureValue_CACHED_MAY_BE_STALE } from '../../services/analytics/growthbook.js'
 import { queryModelWithStreaming } from '../../services/api/claude.js'
 import { collectCodexCompletedResponse } from '../../services/api/codexShim.js'
+import { fetchWithProxyRetry } from '../../services/api/fetchWithProxyRetry.js'
 import {
   resolveCodexApiCredentials,
   resolveProviderRequest,
@@ -314,7 +315,7 @@ async function runCodexWebSearch(
     body.reasoning = request.reasoning
   }
 
-  const response = await fetch(`${request.baseUrl}/responses`, {
+  const response = await fetchWithProxyRetry(`${request.baseUrl}/responses`, {
     method: 'POST',
     headers: {
       'Content-Type': 'application/json',