diff --git a/.env.example b/.env.example
index 904a56db11..2b2a9ddd6f 100644
--- a/.env.example
+++ b/.env.example
@@ -71,6 +71,10 @@ PORT=20128
 # API_HOST=0.0.0.0
 # DASHBOARD_PORT=20128
 
+# Use Turbopack in local dev. Next 16.2.4 can fail to compile next/font/google
+# through the custom dev runner without this on Windows.
+OMNIROUTE_USE_TURBOPACK=1
+
 # Docker production port mappings (docker-compose.prod.yml only).
 # These set the HOST-side published ports. Container ports use PORT/API_PORT.
 # PROD_DASHBOARD_PORT=20130
diff --git a/open-sse/executors/codex.ts b/open-sse/executors/codex.ts
index 241b25afc4..fd0c12a849 100644
--- a/open-sse/executors/codex.ts
+++ b/open-sse/executors/codex.ts
@@ -10,7 +10,7 @@ import { PROVIDERS } from "../config/constants.ts";
 import { getCodexClientVersion, getCodexUserAgent } from "../config/codexClient.ts";
 import { getAccessToken } from "../services/tokenRefresh.ts";
 import { getThinkingBudgetConfig, ThinkingMode } from "../services/thinkingBudget.ts";
-import { getCorsOrigin } from "../utils/cors.ts";
+import { CORS_HEADERS } from "../utils/cors.ts";
 import { createRequire } from "module";
 
 // ─── wreq-js lazy loader ───────────────────────────────────────────────────
@@ -65,7 +65,7 @@ function codexWebSocketUnavailableResponse(): Response {
       status: 503,
       headers: {
         "Content-Type": "application/json",
-        "Access-Control-Allow-Origin": getCorsOrigin(),
+        ...CORS_HEADERS,
       },
     }
   );