style: apply ruff format to persistence and runtime files

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

backend/app/gateway/routers/threads.py

@@ -616,7 +616,6 @@ async def get_thread_history(thread_id: str, body: ThreadHistoryRequest, request
         logger.warning("Failed to load messages from event store for thread %s", _sanitize_log_param(thread_id), exc_info=True)
         all_messages = []
 
-
     entries: list[HistoryEntry] = []
     is_latest_checkpoint = True
     try:

backend/packages/harness/deerflow/persistence/engine.py

@@ -20,6 +20,7 @@ def _json_serializer(obj: object) -> str:
     """JSON serializer with ensure_ascii=False for Chinese character support."""
     return json.dumps(obj, ensure_ascii=False)
 
+
 logger = logging.getLogger(__name__)
 
 _engine: AsyncEngine | None = None

backend/packages/harness/deerflow/persistence/migrations/env.py

@@ -21,10 +21,7 @@ try:
     import deerflow.persistence.models  # noqa: F401 — register ORM models with Base.metadata
 except ImportError:
     # Models not available — migration will work with existing metadata only.
-    logging.getLogger(__name__).warning(
+    logging.getLogger(__name__).warning("Could not import deerflow.persistence.models; Alembic may not detect all tables")
-        "Could not import deerflow.persistence.models; "
-        "Alembic may not detect all tables"
-    )
 
 config = context.config
 if config.config_file_name is not None:

backend/packages/harness/deerflow/persistence/repositories/thread_meta_repo.py

@@ -99,11 +99,7 @@ class ThreadMetaRepository:
     async def update_display_name(self, thread_id: str, display_name: str) -> None:
         """Update the display_name (title) for a thread."""
         async with self._sf() as session:
-            await session.execute(
+            await session.execute(update(ThreadMetaRow).where(ThreadMetaRow.thread_id == thread_id).values(display_name=display_name, updated_at=datetime.now(UTC)))
-                update(ThreadMetaRow)
-                .where(ThreadMetaRow.thread_id == thread_id)
-                .values(display_name=display_name, updated_at=datetime.now(UTC))
-            )
             await session.commit()
 
     async def update_status(self, thread_id: str, status: str) -> None:

backend/packages/harness/deerflow/runtime/converters.py

@@ -47,14 +47,16 @@ def langchain_to_openai_message(message: Any) -> dict:
             openai_tool_calls = []
             for tc in tool_calls:
                 args = tc.get("args", {})
-                openai_tool_calls.append({
+                openai_tool_calls.append(
+                    {
                         "id": tc.get("id", ""),
                         "type": "function",
                         "function": {
                             "name": tc.get("name", ""),
                             "arguments": json.dumps(args) if not isinstance(args, str) else args,
                         },
-                })
+                    }
+                )
             # If no text content, set content to null per OpenAI spec
             result["content"] = content if (isinstance(content, list) and content) or (isinstance(content, str) and content) else None
             result["tool_calls"] = openai_tool_calls

backend/packages/harness/deerflow/runtime/events/store/db.py

@@ -65,11 +65,7 @@ class DbRunEventStore(RunEventStore):
                 # Use FOR UPDATE to serialize seq assignment within a thread.
                 # NOTE: with_for_update() on aggregates is a no-op on SQLite;
                 # the UNIQUE(thread_id, seq) constraint catches races there.
-                max_seq = await session.scalar(
+                max_seq = await session.scalar(select(func.max(RunEventRow.seq)).where(RunEventRow.thread_id == thread_id).with_for_update())
-                    select(func.max(RunEventRow.seq))
-                    .where(RunEventRow.thread_id == thread_id)
-                    .with_for_update()
-                )
                 seq = (max_seq or 0) + 1
                 row = RunEventRow(
                     thread_id=thread_id,
@@ -93,11 +89,7 @@ class DbRunEventStore(RunEventStore):
                 # NOTE: with_for_update() on aggregates is a no-op on SQLite;
                 # the UNIQUE(thread_id, seq) constraint catches races there.
                 thread_id = events[0]["thread_id"]
-                max_seq = await session.scalar(
+                max_seq = await session.scalar(select(func.max(RunEventRow.seq)).where(RunEventRow.thread_id == thread_id).with_for_update())
-                    select(func.max(RunEventRow.seq))
-                    .where(RunEventRow.thread_id == thread_id)
-                    .with_for_update()
-                )
                 seq = max_seq or 0
                 rows = []
                 for e in events:

backend/packages/harness/deerflow/runtime/journal.py

@@ -357,7 +357,8 @@ class RunJournal(BaseCallbackHandler):
     # -- Internal methods --
 
     def _put(self, *, event_type: str, category: str, content: str | dict = "", metadata: dict | None = None) -> None:
-        self._buffer.append({
+        self._buffer.append(
+            {
                 "thread_id": self.thread_id,
                 "run_id": self.run_id,
                 "event_type": event_type,
@@ -365,7 +366,8 @@ class RunJournal(BaseCallbackHandler):
                 "content": content,
                 "metadata": metadata or {},
                 "created_at": datetime.now(UTC).isoformat(),
-        })
+            }
+        )
         if len(self._buffer) >= self._flush_threshold:
             self._flush_sync()
 
@@ -395,7 +397,9 @@ class RunJournal(BaseCallbackHandler):
         except Exception:
             logger.warning(
                 "Failed to flush %d events for run %s — returning to buffer",
-                len(batch), self.run_id, exc_info=True,
+                len(batch),
+                self.run_id,
+                exc_info=True,
             )
             # Return failed events to buffer for retry on next flush
             self._buffer = batch + self._buffer

backend/tests/test_feedback.py

@@ -41,7 +41,10 @@ class TestFeedbackRepository:
     async def test_create_negative_with_comment(self, tmp_path):
         repo = await _make_feedback_repo(tmp_path)
         record = await repo.create(
-            run_id="r1", thread_id="t1", rating=-1, comment="Response was inaccurate",
+            run_id="r1",
+            thread_id="t1",
+            rating=-1,
+            comment="Response was inaccurate",
         )
         assert record["rating"] == -1
         assert record["comment"] == "Response was inaccurate"

backend/tests/test_run_journal.py

@@ -947,8 +947,10 @@ class TestFullRunSequence:
         # 1. Human message (written by worker, using model_dump format)
         human_msg = HumanMessage(content="Search for quantum computing")
         await store.put(
-            thread_id="t1", run_id="r1",
+            thread_id="t1",
-            event_type="human_message", category="message",
+            run_id="r1",
+            event_type="human_message",
+            category="message",
             content=human_msg.model_dump(),
         )
         j.set_first_human_message("Search for quantum computing")