From 97ea3d13d8f5549bc6c6f693ac3f4bfa92f71e22 Mon Sep 17 00:00:00 2001
From: axelray-dev <110029405+axelray-dev@users.noreply.github.com>
Date: Thu, 16 Jul 2026 03:44:54 +0800
Subject: [PATCH] fix(oauth): send Codex client version header on upstream
 requests

Upstream gates newer models on a version header. Attach
resolve_codex_version() when non-empty so completions match /models.

Fixes #1765
---
 plugins/_oauth/helpers/codex.py |  3 +++
 tests/test_oauth_codex.py       | 10 +++++++++-
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/plugins/_oauth/helpers/codex.py b/plugins/_oauth/helpers/codex.py
index adcfdaec6e..b414592d15 100644
--- a/plugins/_oauth/helpers/codex.py
+++ b/plugins/_oauth/helpers/codex.py
@@ -599,6 +599,9 @@ def request_codex(
             "thread-id": metadata["thread_id"],
         }
     )
+    client_version = resolve_codex_version()
+    if client_version:
+        request_headers["version"] = client_version
 
     return requests.request(
         method,
diff --git a/tests/test_oauth_codex.py b/tests/test_oauth_codex.py
index fc4a3159fb..58d8e6b989 100644
--- a/tests/test_oauth_codex.py
+++ b/tests/test_oauth_codex.py
@@ -223,7 +223,10 @@ def test_prepare_responses_body_sends_empty_continuation_input_as_list(monkeypat
     assert body["previous_response_id"] == "resp_1"
 
 
-def test_request_codex_sends_current_codex_headers_from_body(monkeypatch):
+@pytest.mark.parametrize("client_version", ["0.142.5", ""])
+def test_request_codex_sends_current_codex_headers_from_body(
+    monkeypatch, client_version
+):
     calls = []
     body = json.dumps(
         {
@@ -255,6 +258,7 @@ class FakeResponse:
             account_id="account-1",
         ),
     )
+    monkeypatch.setattr(codex, "resolve_codex_version", lambda: client_version)
 
     def fake_request(method, target, headers, data, params, timeout, stream):
         calls.append(
@@ -291,6 +295,10 @@ def fake_request(method, target, headers, data, params, timeout, stream):
     assert call["headers"]["session-id"] == "session-1"
     assert call["headers"]["thread-id"] == "thread-1"
     assert call["headers"]["x-codex-window-id"] == "agent-zero"
+    if client_version:
+        assert call["headers"]["version"] == "0.142.5"
+    else:
+        assert "version" not in call["headers"]
 
 
 def test_chat_messages_to_response_body_preserves_image_parts_for_responses():