fixes

src/ai_client.py

@@ -11,13 +11,12 @@ stale [FILES UPDATED] entries and dropping the oldest message pairs.
 For Gemini: injects the initial context directly into system_instruction 
 during chat creation to avoid massive history bloat.
 """
-# ai_client.py
 import anthropic
 from google import genai
-from google.api_core import exceptions as gac
-from google.genai    import types
 from openai import OpenAI
 
+from google.genai import types
+
 import asyncio
 import datetime
 import difflib

src/models.py

@@ -21,7 +21,7 @@ Status Machine (Ticket):
 Serialization:
  All dataclasses provide to_dict() and from_dict() class methods for TOML/JSON
  persistence via project_manager.py.
-tomli_w
+
 Thread Safety:
  These dataclasses are NOT thread-safe. Callers must synchronize mutations
  if sharing instances across threads (e.g., during ConductorEngine execution).
@@ -29,7 +29,6 @@ Thread Safety:
 Configuration Integration:
  - load_config() / save_config() read/write the global config.toml
  - AGENT_TOOL_NAMES defines the canonical list of MCP tools available to agents
-
 See Also:
  - docs/guide_mma.md for MMA orchestration documentation
  - src/dag_engine.py for TrackDAG and ExecutionEngine
@@ -38,6 +37,7 @@ See Also:
 """
 from __future__ import annotations
 
+
 import datetime
 import json
 import os
@@ -50,7 +50,6 @@ from pathlib     import Path
 from typing      import Any, Dict, List, Optional, Union
 from pydantic    import BaseModel
 
-from src.dag_engine import TrackDAG
 from src.paths      import get_config_path
 
 
@@ -927,7 +926,7 @@ class MCPServerConfig:
  @classmethod
  def from_dict(cls, name: str, data: Dict[str, Any]) -> 'MCPServerConfig':
   """
-  [C: src/personas.py:PersonaManager.load_all, src/presets.py:PresetManager.load_all, src/project_manager.py:load_project, src/project_manager.py:load_track_state, src/tool_presets.py:ToolPresetManager.load_all_bias_profiles, src/tool_presets.py:ToolPresetManager.load_all_presets, src/workspace_manager.py:WorkspaceManager.load_all_profiles, tests/test_bias_models.py:test_bias_profile_model, tests/test_bias_models.py:test_tool_model, tests/test_bias_models.py:test_tool_preset_extension, tests/test_context_presets_models.py:test_context_preset_from_dict_legacy, tests/test_context_presets_models.py:test_context_preset_serialization, tests/test_context_presets_models.py:test_file_view_preset_serialization, tests/test_custom_slices_annotations.py:test_file_item_custom_slices_deserialization_with_annotations, tests/test_custom_slices_annotations.py:test_file_item_custom_slices_round_trip_annotations, tests/test_external_editor.py:TestExternalEditorConfig.test_from_dict_with_dict_editors, tests/test_external_editor.py:TestExternalEditorConfig.test_from_dict_with_string_editors, tests/test_external_editor.py:TestTextEditorConfig.test_from_dict_with_diff_args, tests/test_external_editor.py:TestTextEditorConfig.test_from_dict_without_diff_args, tests/test_file_item_model.py:test_file_item_from_dict, tests/test_file_item_model.py:test_file_item_from_dict_defaults, tests/test_history_manager.py:TestHistoryManager.test_snapshot_roundtrip, tests/test_mcp_config.py:test_mcp_configuration_to_from_dict, tests/test_mcp_config.py:test_mcp_server_config_to_from_dict, tests/test_per_ticket_model.py:test_model_override_default_on_deserialize, tests/test_per_ticket_model.py:test_model_override_deserialization, tests/test_persona_id.py:test_ticket_persona_id_deserialization, tests/test_persona_models.py:test_persona_defaults, tests/test_persona_models.py:test_persona_deserialization, tests/test_project_serialization.py:TestProjectSerialization.test_backward_compatibility_strings, tests/test_slice_editor_behavior.py:test_add_slice_with_annotations, tests/test_ticket_queue.py:test_ticket_from_dict_default_priority, tests/test_ticket_queue.py:test_ticket_from_dict_priority, tests/test_tiered_aggregation.py:test_persona_aggregation_strategy, tests/test_track_state_schema.py:test_track_state_from_dict, tests/test_track_state_schema.py:test_track_state_from_dict_empty_and_missing, tests/test_ui_summary_only_removal.py:test_file_item_serialization_with_flags]
+  [C: src/personas.py:PersonaManager.load_all, src/presets.py:PresetManager.load_all, src/project_manager.py:load_project, src/project_manager.py:load_track_state, src/tool_presets.py:ToolPresetManager.load_all_bias_profiles, src/tool_presets.py:ToolPresetManager.load_all_presets, src/workspace_manager.py:WorkspaceManager.load_all_profiles, tests/test_bias_models.py:test_bias_profile_model, tests/test_bias_models.py:test_tool_model, tests/test_bias_models.py:test_tool_preset_extension, tests/test_context_presets_models.py:test_context_preset_serialization, tests/test_context_presets_models.py:test_file_view_preset_model, tests/test_context_presets_models.py:test_file_view_preset_serialization, tests/test_custom_slices_annotations.py:test_file_item_custom_slices_deserialization_with_annotations, tests/test_custom_slices_annotations.py:test_file_item_custom_slices_round_trip_annotations, tests/test_event_serialization.py:test_user_request_event_serialization, tests/test_external_editor.py:TestExternalEditorConfig.test_from_dict_with_dict_editors, tests/test_external_editor.py:TestExternalEditorConfig.test_from_dict_with_string_editors, tests/test_external_editor.py:TestTextEditorConfig.test_from_dict_with_diff_args, tests/test_external_editor.py:TestTextEditorConfig.test_from_dict_without_diff_args, tests/test_file_item_model.py:test_file_item_from_dict, tests/test_file_item_model.py:test_file_item_from_dict_defaults, tests/test_gui_events_v2.py:test_user_request_event_payload, tests/test_history_manager.py:TestHistoryManager.test_snapshot_roundtrip, tests/test_mcp_config.py:test_load_mcp_config, tests/test_mcp_config.py:test_mcp_configuration_to_from_dict, tests/test_mcp_config.py:test_mcp_server_config_to_from_dict, tests/test_per_ticket_model.py:test_model_override_default_on_serialize, tests/test_per_ticket_model.py:test_model_override_deserialization, tests/test_persona_id.py:test_ticket_persona_id_deserialization, tests/test_persona_models.py:test_persona_defaults, tests/test_persona_models.py:test_persona_deserialization, tests/test_project_serialization.py:TestProjectSerialization.test_backward_compatibility_strings, tests/test_slice_editor_behavior.py:test_add_slice_with_annotations, tests/test_thinking_gui.py:test_thinking_segment_model_compatibility, tests/test_ticket_queue.py:test_ticket_from_dict_default_priority, tests/test_ticket_queue.py:test_ticket_from_dict_priority, tests/test_tiered_aggregation.py:test_persona_aggregation_strategy, tests/test_track_state_schema.py:test_track_state_from_dict, tests/test_track_state_schema.py:test_track_state_from_dict_empty_and_missing, tests/test_ui_summary_only_view_mode_removal.py:test_file_item_serialization_with_flags]
   """
   return cls(
    name       = name,
@@ -937,6 +936,10 @@ class MCPServerConfig:
    auto_start = data.get('auto_start', False),
   )
 
+#endregion: MCP Config
+
+from src.dag_engine import TrackDAG
+
 @dataclass
 class MCPConfiguration:
  mcpServers: Dict[str, MCPServerConfig] = field(default_factory=dict)