fix(memory): encode bytes in OpenAI converter reasoning blocks

src/bedrock_agentcore/memory/integrations/strands/converters/openai.py

@@ -8,7 +8,7 @@
 import logging
 from typing import Any, Tuple
 
-from strands.types.session import SessionMessage
+from strands.types.session import SessionMessage, decode_bytes_values, encode_bytes_values
 
 from .protocol import exceeds_conversational_limit
 
@@ -45,7 +45,7 @@ def _bedrock_to_openai(message: dict) -> dict:
         elif "reasoningContent" in item:
             # OpenAI message shape does not have a stable multi-turn reasoning block field.
             # Preserve original block(s) in storage-only extension field for lossless restore.
-            reasoning_blocks.append(item)
+            reasoning_blocks.append(encode_bytes_values(item))
         elif "toolUse" in item:
             tu = item["toolUse"]
             tool_calls.append(
@@ -120,7 +120,7 @@ def _openai_to_bedrock(openai_msg: dict) -> dict:
 
     for rc in openai_msg.get("_strands_reasoning_content", []):
         if isinstance(rc, dict) and "reasoningContent" in rc:
-            reasoning_items.append(rc)
+            reasoning_items.append(decode_bytes_values(rc))
 
     bedrock_role = "assistant" if role == "assistant" else "user"
 

tests/bedrock_agentcore/memory/integrations/strands/test_openai_converter.py

@@ -90,6 +90,28 @@ def test_reasoning_content_round_trips_in_openai_converter():
     assert any("reasoningContent" in block for block in restored_content)
 
 
+def test_redacted_reasoning_bytes_round_trip_in_openai_converter():
+    msg = SessionMessage(
+        message={
+            "role": "assistant",
+            "content": [
+                {"reasoningContent": {"redactedContent": b"rsn_abc"}},
+                {"text": "208"},
+            ],
+        },
+        message_id=8,
+    )
+
+    payload_json, _ = OpenAIConverseConverter.message_to_payload(msg)[0]
+    events = [{"payload": [{"conversational": {"content": {"text": payload_json}}}]}]
+    restored = OpenAIConverseConverter.events_to_messages(events)
+
+    assert restored[0].message["content"] == [
+        {"reasoningContent": {"redactedContent": b"rsn_abc"}},
+        {"text": "208"},
+    ]
+
+
 def test_openai_converter_round_trips_from_blob_payload():
     msg = SessionMessage(
         message={