Repro steps

I develop an extension which adds a JupyterServerProvider through createJupyterServerCollection. The latest ms-toolsai.jupyter seems to have broken that functionality.

Environment data

• VS Code version: 1.104.2
• Jupyter Extension version (available under the Extensions sidebar): 2023.8.1002501831
• Python Extension version (available under the Extensions sidebar): 2025.14.0
• OS (Windows | Mac | Linux distro) and version: Tested on both Linux and Mac.
• Python and/or Anaconda version: N/A
• Type of virtual environment used (N/A | venv | virtualenv | conda | ...): N/A
• Jupyter server running: N/A

Expected behaviour

Can register a JupyterServerProvider as before.

Actual behaviour

createJupyterServerCollection is throwing Not Implemented. when called.

Steps to reproduce:

[NOTE: Self-contained, minimal reproducing code samples are extremely helpful and will expedite addressing your issue]

1. Create an extension which registers a Jupyter server provider by calling createJupyterServerCollection.
2. Launch it.

Logs

Top level log failure: Error: Not Implemented.

I'm also seeing these: this.vscNotebook.onDidChangeNotebookCellExecutionState is not a function.

They both come from the Extension Host logs, since I'm running my extension locally.