fix(openai): proxy websocket connections under bun (#29832)

packages/opencode/src/plugin/openai/ws.ts

@@ -4,6 +4,7 @@
 import WebSocket from "ws"
 import { ProviderError } from "@/provider/error"
 import { errorMessage } from "@/util/error"
+import { ProxyEnv } from "@/util/proxy-env"
 
 export const PROTOCOL_HEADER = "responses_websockets=2026-02-06"
 
@@ -72,7 +73,13 @@ export function connectResponsesWebSocket(options: ConnectResponsesWebSocketOpti
     }
     delete headers["content-length"]
 
-    const socket = new WebSocket(options.url, { headers })
+    // Bun does not apply HTTP(S)_PROXY to WebSockets unless the proxy is supplied explicitly.
+    const proxy =
+      typeof Bun === "undefined"
+        ? undefined
+        : ProxyEnv.getProxyForUrl(options.url.replace(/^wss:/, "https:").replace(/^ws:/, "http:"))
+    const connect = { headers, ...(proxy ? { proxy } : {}) }
+    const socket = new WebSocket(options.url, connect)
     const timeout = options.timeout
       ? setTimeout(() => {
           cleanup()