fix(memory): store Claude Code's tool_response in PostToolUse

src/context_engine/memory/hooks.py

@@ -312,7 +312,15 @@ async def handle_post_tool_use(request: web.Request) -> web.Response:
 
     tool_name = data.get("tool_name", "unknown")
     tool_input = data.get("tool_input") or data.get("tool_input_json") or {}
-    tool_output = data.get("tool_output") or data.get("tool_output_json") or ""
+    # Claude Code's PostToolUse payload names the result `tool_response`
+    # (often an object, e.g. {"stdout": ..., "stderr": ...} for Bash); the
+    # installed hook script forwards it unchanged.
+    tool_output = (
+        data.get("tool_output")
+        or data.get("tool_output_json")
+        or data.get("tool_response")
+        or ""
+    )
     prompt_number = data.get("prompt_number")
 
     raw_input = tool_input if isinstance(tool_input, str) else json.dumps(tool_input)

tests/memory/test_hooks.py

@@ -254,6 +254,35 @@ async def test_post_tool_use_inserts_event_and_payload(hook_app, aiohttp_client)
     assert payload["size_bytes"] > 0
 
 
+async def test_post_tool_use_stores_claude_code_tool_response(hook_app, aiohttp_client):
+    """Claude Code's own PostToolUse payload carries the result as
+    `tool_response` (an object for Bash), not `tool_output`; it must still
+    land in raw_output instead of being stored empty."""
+    app, conn = hook_app
+    client = await aiohttp_client(app)
+    await client.post(
+        "/hooks/UserPromptSubmit", json={"session_id": "abc", "prompt": "run it"},
+    )
+    resp = await client.post(
+        "/hooks/PostToolUse",
+        json={
+            "session_id": "abc",
+            "transcript_path": "/tmp/abc.jsonl",
+            "cwd": "/tmp",
+            "hook_event_name": "PostToolUse",
+            "tool_name": "Bash",
+            "tool_input": {"command": "echo hello", "description": "Say hello"},
+            "tool_response": {"stdout": "hello", "stderr": "", "interrupted": False},
+        },
+    )
+    assert resp.status == 200
+    payload = conn.execute(
+        "SELECT p.raw_output FROM tool_events e "
+        "JOIN tool_event_payloads p ON p.id = e.payload_id"
+    ).fetchone()
+    assert '"stdout": "hello"' in payload["raw_output"]
+
+
 async def test_stop_enqueues_turn_compression(hook_app, aiohttp_client):
     app, conn = hook_app
     client = await aiohttp_client(app)