Description

As far as I can tell, I have applied the necessary configuration to use Ruff to format notebooks on save, but it just will not do anything. It does work on regular python files just fine.

Environment

Windows 10
Python: 3.12.4
VSCode Ruff Extension: v2024.36.0 (includes ruff 0.5.4)

I have the following in my settings.json:

{
    "notebook.formatOnSave.enabled": true,
    "notebook.defaultFormatter": "charliermarsh.ruff",
    "notebook.codeActionsOnSave": {
        "notebook.source.fixAll": "explicit",
        "notebook.source.organizeImports": "explicit",
    },
    "[python]": {
        "editor.formatOnSave": true,
        "editor.defaultFormatter": "charliermarsh.ruff",
        "editor.codeActionsOnSave": {
            "source.fixAll": "explicit",
            "source.organizeImports": "explicit",
        }
    },
}

I added a ruff.toml file to my workspace with the following setting:

[tool.ruff]
extend-include = ["*.ipynb"]

IIUC, the extension should find that file automatically, but I also tried specifying a path to ruff.toml in the extension settings, with no effect.

Expected Results

I expected Ruff to format my .ipynb files on save the same it does my .py files.

Actual Results

Nothing. VSCode Output shows the extension loading, resolving ruff.nativeServer: auto to use the native server, and a request to start the server, with no indications that any errors occur.