feat(types): Complete strict static analysis and typing track

tests/test_arch_boundary_phase2.py

@@ -3,7 +3,6 @@ Tests for architecture_boundary_hardening_20260302 — Phase 2.
 Tasks 2.1-2.4: MCP tool config exposure + MUTATING_TOOLS + HITL enforcement.
 """
 import tomllib
-import pytest
 from project_manager import default_project
 
 MUTATING_TOOLS = {"set_file_slice", "py_update_definition", "py_set_signature", "py_set_var_declaration"}
@@ -101,9 +100,8 @@ def test_mutating_tools_excludes_read_tools():
 
 def test_mutating_tool_triggers_pre_tool_callback(monkeypatch):
  """When a mutating tool is called and pre_tool_callback is set, it must be invoked."""
- import ai_client
  import mcp_client
- from unittest.mock import MagicMock, patch
+ from unittest.mock import patch
  callback_called = []
  def fake_callback(desc, base_dir, qa_cb):
   callback_called.append(desc)
@@ -113,12 +111,11 @@ def test_mutating_tool_triggers_pre_tool_callback(monkeypatch):
    tool_name = "set_file_slice"
    args = {"path": "foo.py", "start_line": 1, "end_line": 2, "new_content": "x"}
    # Simulate the logic from all 4 provider dispatch blocks
-   out = ""
    _res = fake_callback(f"# MCP MUTATING TOOL: {tool_name}", ".", None)
    if _res is None:
-    out = "USER REJECTED: tool execution cancelled"
+    pass
    else:
-    out = mcp_client.dispatch(tool_name, args)
+    mcp_client.dispatch(tool_name, args)
    assert len(callback_called) == 1, "pre_tool_callback must be called for mutating tools"
    assert mock_dispatch.called