diff --git a/backend/packages/harness/deerflow/sandbox/tools.py b/backend/packages/harness/deerflow/sandbox/tools.py
index 41e5afe88..4bc515bf7 100644
--- a/backend/packages/harness/deerflow/sandbox/tools.py
+++ b/backend/packages/harness/deerflow/sandbox/tools.py
@@ -854,9 +854,7 @@ def ensure_sandbox_initialized(runtime: ToolRuntime[ContextT, ThreadState] | Non
     # Lazy acquisition: get thread_id and acquire sandbox
     thread_id = get_thread_id(runtime)
     if thread_id is None:
-        raise SandboxRuntimeError(
-            "Thread ID not available in runtime context, runtime config, or LangGraph config"
-        )
+        raise SandboxRuntimeError("Thread ID not available in runtime context, runtime config, or LangGraph config")
 
     provider = get_sandbox_provider()
     sandbox_id = provider.acquire(thread_id)
diff --git a/backend/packages/harness/deerflow/tools/builtins/present_file_tool.py b/backend/packages/harness/deerflow/tools/builtins/present_file_tool.py
index a6f5e8cf4..ef0cb6242 100644
--- a/backend/packages/harness/deerflow/tools/builtins/present_file_tool.py
+++ b/backend/packages/harness/deerflow/tools/builtins/present_file_tool.py
@@ -36,9 +36,7 @@ def _normalize_presented_filepath(
 
     thread_id = get_thread_id(runtime)
     if not thread_id:
-        raise ValueError(
-            "Thread ID is not available in runtime context, runtime config, or LangGraph thread-local config"
-        )
+        raise ValueError("Thread ID is not available in runtime context, runtime config, or LangGraph thread-local config")
 
     thread_data = runtime.state.get("thread_data") or {}
     outputs_path = thread_data.get("outputs_path")