jupyterlab 4.5.4

v4.5.4

on Python PyPI

4.5.4

(Full Changelog)

Bugs fixed

• Avoid using system clipboard in Notebook widget #18474 (@brichet)
• Update CodeMirror versions, fixing a few selection issues #18466 (@krassowski)
• Fix debugger variable panel to render value 0 properly #18464 (@itsmevichu)
• Consider both the content type and pattern match in DocumentRegistry.getFileTypeForModel() #18409 (@krassowski)
• false in saveAs to avoid fetching file body #18379 (@DeborahOlaboye)

Maintenance and upkeep improvements

• Bump Lumino packages to the 2026.2.5 release, fixing iframe resizing #18440 (@jasongrout)

Documentation improvements

• Clarify notebook and cell metadata API changes in JupyterLab 4 #18304 (@Krish-876)
• Document a change in the Code Editor source updates via sharedModel in JupyterLab 4 #18260 (@Krish-876)
• Fix Contents API fetch documentation of the content default #18383 (@ceasermikes002)
• Add AI rules #18322 (@jtpio)

Contributors to this release

The following people contributed discussions, new ideas, code and documentation contributions, and review.
See our definition of contributors.

(GitHub contributors page for this release)

@brichet (activity) | @ceasermikes002 (activity) | @DeborahOlaboye (activity) | @itsmevichu (activity) | @jasongrout (activity) | @jtpio (activity) | @krassowski (activity) | @Krish-876 (activity)