[Feature Request] Can we make the new Dash 4.3 MPC feature optional?

[ghaarsma]

When upgrading from a clean 4.2 Dash (24 dependencies) to 4.3, it requires an additional 26 newly installed dependencies to perform the upgrade. See original install log and 4.2 -> 4.3 upgrade log below.

It seems that a lot of the new installs are related to the new MCP feature. Would it be possible to make this an optional install for the next release?

Resolving dependencies... (14.1s)

Package operations: 24 installs, 0 updates, 0 removals

  - Installing colorama (0.4.6)
  - Installing markupsafe (3.0.3)
  - Installing blinker (1.9.0)
  - Installing charset-normalizer (3.4.7)
  - Installing certifi (2026.6.17)
  - Installing click (8.4.1)
  - Installing idna (3.18)
  - Installing itsdangerous (2.2.0)
  - Installing jinja2 (3.1.6)
  - Installing narwhals (2.22.1)
  - Installing packaging (26.2)
  - Installing urllib3 (2.7.0)
  - Installing werkzeug (3.1.8)
  - Installing zipp (4.1.0)
  - Installing flask (3.1.3)
  - Installing plotly (6.8.0)
  - Installing typing-extensions (4.15.0)
  - Installing requests (2.34.2)
  - Installing setuptools (82.0.1)
  - Installing janus (2.0.0)
  - Installing retrying (1.4.2)
  - Installing importlib-metadata (9.0.0)
  - Installing nest-asyncio (1.6.0)
  - Installing dash (4.2.0)


(venv) PS C:\Users\gxvh\Python\dash_test5> poetry update
Updating dependencies
Resolving dependencies... (24.3s)

Package operations: 26 installs, 1 update, 0 removals

  - Installing attrs (26.1.0)
  - Installing pycparser (3.0)
  - Installing rpds-py (2026.5.1)
  - Installing annotated-types (0.7.0)
  - Installing h11 (0.16.0)
  - Installing cffi (2.0.0)
  - Installing anyio (4.14.0)
  - Installing pydantic-core (2.46.4)
  - Installing referencing (0.37.0)
  - Installing typing-inspection (0.4.2)
  - Installing cryptography (49.0.0)
  - Installing jsonschema-specifications (2025.9.1)
  - Installing pydantic (2.13.4)
  - Installing python-dotenv (1.2.2)
  - Installing starlette (1.3.1)
  - Installing httpcore (1.0.9)
  - Installing httpx (0.28.1)
  - Installing pywin32 (312)
  - Installing jsonschema (4.26.0)
  - Installing pydantic-settings (2.14.2)
  - Installing pyjwt (2.13.0)
  - Installing python-multipart (0.0.32)
  - Installing httpx-sse (0.4.3)
  - Installing sse-starlette (3.4.4)
  - Installing uvicorn (0.49.0)
  - Installing mcp (1.28.0)
  - Updating dash (4.2.0 -> 4.3.0)

Writing lock file
(venv) PS C:\Users\gxvh\Python\dash_test5>