fix: preserve request extensions on x402 retry

src/x402_openai/_transport.py

@@ -32,6 +32,7 @@ def _clone_request_with_headers(
         url=original.url,
         headers=headers,
         content=original.content,
+        extensions=dict(original.extensions),
     )
 
 

tests/test_transport.py

@@ -0,0 +1,39 @@
+from __future__ import annotations
+
+import httpx
+
+from x402_openai._transport import _clone_request_with_headers
+
+
+def test_clone_request_merges_headers() -> None:
+    original = httpx.Request(
+        "POST",
+        "https://example.com/v1/chat",
+        headers={"authorization": "Bearer old-token", "x-trace": "abc"},
+        content=b'{"prompt":"hello"}',
+    )
+
+    cloned = _clone_request_with_headers(
+        original,
+        {
+            "authorization": "Bearer new-token",
+            "x-payment": "signed",
+        },
+    )
+
+    assert cloned.headers["authorization"] == "Bearer new-token"
+    assert cloned.headers["x-trace"] == "abc"
+    assert cloned.headers["x-payment"] == "signed"
+    assert cloned.content == original.content
+
+
+def test_clone_request_preserves_extensions() -> None:
+    original = httpx.Request(
+        "GET",
+        "https://example.com/v1/models",
+        extensions={"timeout": {"connect": 1.0, "read": 2.0}},
+    )
+
+    cloned = _clone_request_with_headers(original, {"x-payment": "signed"})
+
+    assert cloned.extensions == original.extensions