fix: preserve Codex JSON-RPC code

adapters/codex/src/nemo_fabric_adapters/codex/adapter.py

@@ -22,6 +22,7 @@
     AsyncCodex,
     CodexConfig,
     CodexError,
+    JsonRpcError,
     Sandbox,
     TransportClosedError,
     is_retryable_error,
@@ -793,11 +794,14 @@ def sdk_failure(error: BaseException) -> dict[str, Any]:
             "codex_connection_failed", "Codex SDK runtime connection closed"
         )
     if isinstance(error, CodexError):
+        metadata = {"sdk_error": type(error).__name__}
+        if isinstance(error, JsonRpcError):
+            metadata["jsonrpc_code"] = error.code
         return _failure(
             "codex_sdk_failed",
             "Codex SDK request failed",
             retryable=is_retryable_error(error),
-            sdk_error=type(error).__name__,
+            **metadata,
         )
     if isinstance(error, OSError):
         return _failure(

tests/adapters/test_codex_adapter.py

@@ -13,7 +13,7 @@
 import pytest
 from nemo_fabric import Fabric
 from nemo_fabric_adapters.codex import adapter
-from openai_codex import AsyncCodex, AsyncThread, AsyncTurnHandle
+from openai_codex import AsyncCodex, AsyncThread, AsyncTurnHandle, JsonRpcError
 from openai_codex.types import TurnStatus
 
 
@@ -711,6 +711,15 @@ def test_failed_sdk_turn_is_normalized_and_transport_is_closed(
     assert mock_codex.instances[0].closed is True
 
 
+def test_sdk_failure_preserves_jsonrpc_code():
+    output = adapter.sdk_failure(JsonRpcError(-32000, "provider failure"))
+
+    assert output["error"]["metadata"] == {
+        "sdk_error": "JsonRpcError",
+        "jsonrpc_code": -32000,
+    }
+
+
 def test_incomplete_sdk_turn_is_failed(codex_payload, mock_codex):
     result = successful_result(response=None)
     mock_codex.next_result = result