run black, add isort config to pyproject.toml

tests/integration_test_agent_tool_graph.py

@@ -2,19 +2,15 @@ import time
 import uuid
 
 import pytest
+
 from letta import create_client
 from letta.schemas.letta_message import ToolCallMessage
-from letta.schemas.tool_rule import (
-  ChildToolRule,
-  ConditionalToolRule,
-  InitToolRule,
-  TerminalToolRule,
-)
+from letta.schemas.tool_rule import ChildToolRule, ConditionalToolRule, InitToolRule, TerminalToolRule
 from tests.helpers.endpoints_helper import (
-  assert_invoked_function_call,
-  assert_invoked_send_message_with_keyword,
-  assert_sanity_checks,
-  setup_agent,
+    assert_invoked_function_call,
+    assert_invoked_send_message_with_keyword,
+    assert_sanity_checks,
+    setup_agent,
 )
 from tests.helpers.utils import cleanup