feat(agent): add summary handling for reasoning items

Enhanced the AIAgent class to capture and normalize summary information for reasoning items. Implemented logic to handle summaries as lists, ensuring proper formatting for API interactions. Updated tests to validate the inclusion of summaries in reasoning items, both for existing and default cases.

run_agent.py

@@ -1596,6 +1596,11 @@ class AIAgent:
                     item_id = item.get("id")
                     if isinstance(item_id, str) and item_id:
                         reasoning_item["id"] = item_id
+                    summary = item.get("summary")
+                    if isinstance(summary, list):
+                        reasoning_item["summary"] = summary
+                    else:
+                        reasoning_item["summary"] = []
                     normalized.append(reasoning_item)
                 continue
 
@@ -1828,6 +1833,15 @@ class AIAgent:
                     item_id = getattr(item, "id", None)
                     if isinstance(item_id, str) and item_id:
                         raw_item["id"] = item_id
+                    # Capture summary — required by the API when replaying reasoning items
+                    summary = getattr(item, "summary", None)
+                    if isinstance(summary, list):
+                        raw_summary = []
+                        for part in summary:
+                            text = getattr(part, "text", None)
+                            if isinstance(text, str):
+                                raw_summary.append({"type": "summary_text", "text": text})
+                        raw_item["summary"] = raw_summary
                     reasoning_items_raw.append(raw_item)
             elif item_type == "function_call":
                 if item_status in {"queued", "in_progress", "incomplete"}:

tests/test_provider_parity.py

@@ -539,7 +539,8 @@ class TestCodexReasoningPreflight:
                             base_url="https://chatgpt.com/backend-api/codex")
         raw_input = [
             {"role": "user", "content": "hello"},
-            {"type": "reasoning", "encrypted_content": "abc123encrypted", "id": "r_001"},
+            {"type": "reasoning", "encrypted_content": "abc123encrypted", "id": "r_001",
+             "summary": [{"type": "summary_text", "text": "Thinking about it"}]},
             {"role": "assistant", "content": "hi there"},
         ]
         normalized = agent._preflight_codex_input_items(raw_input)
@@ -547,6 +548,7 @@ class TestCodexReasoningPreflight:
         assert len(reasoning_items) == 1
         assert reasoning_items[0]["encrypted_content"] == "abc123encrypted"
         assert reasoning_items[0]["id"] == "r_001"
+        assert reasoning_items[0]["summary"] == [{"type": "summary_text", "text": "Thinking about it"}]
 
     def test_reasoning_item_without_id(self, monkeypatch):
         agent = _make_agent(monkeypatch, "openai-codex", api_mode="codex_responses",
@@ -557,6 +559,7 @@ class TestCodexReasoningPreflight:
         normalized = agent._preflight_codex_input_items(raw_input)
         assert len(normalized) == 1
         assert "id" not in normalized[0]
+        assert normalized[0]["summary"] == []  # default empty summary
 
     def test_reasoning_item_empty_encrypted_skipped(self, monkeypatch):
         agent = _make_agent(monkeypatch, "openai-codex", api_mode="codex_responses",