JupyterLab

4.6.0

(Full Changelog)

New features added

• Support horizontal activity bars #18832 (@jtpio, @krassowski)
• Expose cell index and cell count in the statusbar #18708 (@krassowski, @jtpio)
• Allow moving sections between panels #18703 (@Darshan808, @Carreau, @brichet, @jtpio, @krassowski)
• Make the breadcrumbs in filebrowser editable + completion #18571 (@Carreau, @krassowski)
• Add "Date Created" column to file browser #18533 (@ktaletsk, @RRosio, @cursoragent, @krassowski)
• Add command and buttons to select previous/next last modified cell #18210 (@Yahiewi, @brichet, @krassowski)
• feat(completer): Add syntax highlighting for ghost text #18073 (@MUFFANUJ, @Darshan808, @jtpio, @krassowski)

Deprecated features

• Replace deprecated keyCode with key #18674 (@IsabelParedes, @krassowski)
• Drives: Deprecate the notion of defaultContentProvider #18169 (@martinRenou, @brichet, @jasongrout, @jtpio, @krassowski)

Enhancements made

• Update lumino to v2026.5.25 #18942 (@krassowski, @jtpio)
• Improve scroll overlay icon placement #18907 (@krassowski, @jtpio)
• Optimize resizing dock panels (with an opt-out) #18877 (@krassowski, @Darshan808)
• Use resolvePath API for traceback path resolution #18876 (@MUFFANUJ, @krassowski)
• Add loading animation for file browser refresh action #18855 (@Siddhazntx, @krassowski)
• Upgrade Stylelint to v16 #18848 (@MUFFANUJ, @krassowski)
• Add category-level ordering support for launcher sections via categoryRank #18779 (@tsharma-dev, @MUFFANUJ, @krassowski)
• File browser: replace Preferred icon to avoid confusion with Home #18773 (@tsharma-dev, @Carreau, @IsabelParedes, @krassowski)
• Ask if the user wants to sanitize HTML export and send param to jupyter server #18765 (@Yann-P, @krassowski)
• Add a setting to disable the dock panel padding #18760 (@jtpio, @krassowski)
• Remove Simple Mode switch from the status bar #18757 (@jtpio, @aarondr77, @krassowski)
• Add toggle command for output scrolling #18754 (@itsmejay80, @krassowski)
• Refactor shared document dirty state #18739 (@davidbrochart, @SylvainCorlay, @brichet, @jtpio, @krassowski)
• Restrict 1-6 shortcuts for converting cell to headings to Markdown cells #18734 (@krassowski, @jtpio)
• Add "toggle hidden file" to command palette #18732 (@Carreau, @krassowski)
• Add command and Command Palette entry for crumbs path edition #18729 (@Carreau, @Copilot, @krassowski)
• Integrate Plugin Playground into docs #18726 (@MUFFANUJ, @Carreau, @jtpio, @krassowski)
• Allow reset query parameter with values (e.g. ?reset=1) #18702 (@tubaman, @claude, @itsmejay80, @krassowski)
• Improve Keyboard Shortcuts in Settings Editor #18655 (@IsabelParedes, @krassowski)
• Fix accessibility of Keyboard Shortcuts dialog #18650 (@IsabelParedes, @jayaprajapatii, @krassowski)
• Update default font family to honor macOS system-wide ui-monospace #18647 (@flaviomartins, @krassowski)
• Add deletable toggle to common tools notebook widget #18645 (@cmarmo, @krassowski)
• Improve focus indicators #18619 (@IsabelParedes, @krassowski)
• Expose IDefaultFileBrowserRenderer to customize the default file browser renderer #18600 (@jtpio, @krassowski)
• Persist file browser sort state in state DB #18596 (@statxc, @krassowski)
• Add language pack installation support via Settings > Language menu #18595 (@bittoby, @krassowski)
• Improve screen reader behavior in launcher/notebook and add tests #18570 (@autodots-AHassan, @krassowski)
• Fall back to line comments when block comment syntax is unavailable #18563 (@altis0725, @claude, @krassowski)
• Render inline completion for all cursors #18555 (@MUFFANUJ, @krassowski)
• Clear file browser filter when changing directories #18548 (@RRosio, @Copilot, @krassowski)
• Galata: fix fonts and font rendering for consistency #18535 (@krassowski, @brichet, @jtpio)
• ENH: terminal shift enter #18523 (@ianhi, @jtpio, @krassowski)
• Expand the file browser breadcrumbs when there is space available adaptively #18430 (@MUFFANUJ, @krassowski)
• Add automated spell check for documentation #18398 (@MUFFANUJ, @Copilot, @krassowski)
• Add setting to paste code cells without their outputs #18390 (@MUFFANUJ, @aaron-seq, @krassowski, @superlevure)
• Add setting to choose file name sort order in the file browser #18388 (@MUFFANUJ, @krassowski)
• Add root option to limit FileDialog navigation to a subdirectory #18372 (@DeborahOlaboye, @krassowski)
• Enable moving the console prompt if the console is visible #18332 (@brichet, @krassowski)
• Allow preventing console title to update #18331 (@brichet, @krassowski)
• Add Ctrl+B shortcut to toggle bold formatting in markdown cells #18328 (@MUFFANUJ, @aaron-seq, @jasongrout, @krassowski)
• Added interrupt_mode to the Kernel Spec interface #18307 (@fleming79, @krassowski)
• add better colour to improve visibility against the background #18284 (@MUFFANUJ, @Darshan808)
• Add Ctrl + Y key binding for redo command on Windows and Linux #18275 (@soniya-malviy, @Darshan808, @krassowski)
• Add 'Open in Terminal' from file browser context menu #18274 (@MUFFANUJ, @krassowski, @raffaelemancuso)
• Error background configurable from theme settings #18219 (@brichet, @krassowski)
• Add Find and replace command to the Edit menu #18218 (@Meriem-BenIsmail, @brichet, @krassowski)
• Debugger: Move the responsibility to set the current source to the sources model #18213 (@HaudinFlorence, @brichet, @jtpio, @krassowski, @martinRenou)
• Styling of settings array buttons #18211 (@brichet, @krassowski)
• Add commands to split main area widgets #18192 (@Meriem-BenIsmail, @brichet, @jtpio, @krassowski)
• Add a "Stop Debugger" button to the paused overlay #18184 (@arjxn-py, @jtpio, @krassowski, @martinRenou)
• Add confirmation step for cell toolbar "delete" button #18182 (@MUFFANUJ, @Darshan808, @krassowski)
• Detect and log slow plugins #18181 (@Darshan808, @jtpio, @krassowski)
• Add the 'jupyterlab' entry point #18158 (@brichet, @jasongrout, @jtpio)
• Make Kernel Info timeout editable #18137 (@linlol, @Darshan808, @jtpio, @krassowski)
• Add a setting to show file filter bar by default #18104 (@MUFFANUJ, @Darshan808, @krassowski)
• Automatically refresh Kernel Sources after cell execution #18081 (@arjxn-py, @Darshan808, @krassowski, @martinRenou)
• Move Kernel Sources filter bar to toolbar and enable live filtering #18079 (@arjxn-py, @jtpio, @krassowski, @martinRenou)
• Improve the error message provided when jupyterhub is missing #18060 (@frenzymadness, @Darshan808, @hroncok, @krassowski)
• Add copy/paste/cut for text in the notebook context menu #18030 (@Meriem-BenIsmail, @krassowski)
• Debugger: display sources in main area widgets #17986 (@HaudinFlorence, @RRosio, @SylvainCorlay, @brichet, @jtpio, @krassowski, @martinRenou)
• Use no-op manager if terminals are unavailable #17930 (@krassowski, @jasongrout, @jtpio)

Bugs fixed

• Fix flaky filebrowser filter navigation test #19015 (@MUFFANUJ, @krassowski)
• Forbid relative URLs in extensionmanager #19013 (@Yann-P, @krassowski)
• Avoid debugger toolbar button flicker during kernel startup #19006 (@MUFFANUJ, @krassowski)
• Fix XSS in extension manager's homepage_url #19003 (@Yann-P, @krassowski)
• Fix too eager autocompletion heuristics #19000 (@MUFFANUJ, @krassowski)
• Fix toolbar popup row clipping in Safari #18998 (@arun-357, @krassowski)
• Fix HTMLSelect dropdown icon misalignment in toolbar popup #18996 (@arun-357, @claude, @krassowski)
• Fix hidden cells after moving collapsed headings #18992 (@MUFFANUJ, @krassowski)
• Deduplicate concurrent LSP document connects by URI #18980 (@MUFFANUJ, @krassowski)
• Fix scrolling to heading in ToC, workspace opening and flaky UI tests #18961 (@krassowski, @jtpio)
• Fix read-only indicator #18960 (@davidbrochart, @jtpio, @krassowski)
• Forward port CodeMirror DOM compatibility patch #18947 (@krassowski, @Darshan808)
• Prevent dialog from hanging when getValue() throws #18938 (@AliMahmoudDev, @krassowski)
• Add packaging min version pin #18910 (@krassowski, @Darshan808)
• Theme the CSV viewer scrollbar in dark themes #18892 (@dhgoal, @Darshan808, @krassowski)
• Use TabBarSvg.titleLabel fallback in Open Tabs panel #18883 (@dhgoal, @krassowski)
• Fix execution state and outputs after undo #18873 (@krassowski, @Darshan808)
• Accept aborted status in IReplyAbortContent #18871 (@dhgoal, @krassowski)
• Treat TypeDoc validation warnings as errors and and TSDoc linting #18859 (@MUFFANUJ, @krassowski)
• Fix opening notebook without a kernel if the kernel already exists by adding shouldReuse preference #18856 (@MUFFANUJ, @krassowski)
• Use CSS anchor for prompt overlay #18840 (@CrafterKolyan, @krassowski)
• Fix PanelWithToolbar: use optional toolbar in constructor options #18824 (@brichet, @krassowski)
• Fix Kernel Sources tab reuse and line highlighting behavior #18809 (@MUFFANUJ, @krassowski)
• Fix notebook hang when dropping cells #18808 (@MUFFANUJ, @Meriem-BenIsmail, @krassowski)
• Fix PageConfig.getUrl to honor explicit workspace option #18791 (@boskodev790, @krassowski)
• Fix keyboard navigation for file browser bread crumbs #18767 (@IsabelParedes, @krassowski)
• Fix native context menu blocked even when context menu is suppressed #18753 (@utsav-develops, @krassowski)
• Fix Contextual Help keyboard shortcut reliability and menu Help functionality #18747 (@itsmejay80, @Copilot, @claude, @krassowski)
• Fix focusing input element when opening a dialog from Command Palette #18735 (@Carreau, @krassowski)
• Fix inconsistent width measurement for breadcrumbs #18728 (@Carreau, @krassowski)
• Fix keyboard navigation (tab trap) for terminal #18706 (@IsabelParedes, @krassowski)
• Contents Manager: Allow force renaming #18681 (@martinRenou, @krassowski)
• Fix ability to render cells as read-only via notebook factory override #18680 (@krassowski, @brichet)
• Fix inline completer space reservation settings having no effect #18662 (@moktamd, @krassowski)
• Fix version of core.package.json in @jupyterlab/core-meta #18657 (@Darshan808, @krassowski)
• Video and Audio Content Providers: Fix JupyterLite support #18652 (@martinRenou, @jtpio, @krassowski)
• Fix heading undo issue #18646 (@tsharma-dev, @MUFFANUJ, @krassowski)
• Deactivate the delete cell command icon on non deletable cells #18640 (@cmarmo, @krassowski, @nthiery)
• Fix keyboard navigation for console #18638 (@IsabelParedes, @krassowski)
• Fix flaky toolbar item placement in popup #18618 (@filipeoliveira05, @brichet, @krassowski)
• Harmonize translation wrappers in Python files to use gettext methods #18597 (@tmetzl, @krassowski)
• Remove unimplemented filebrowser:search command #18593 (@krassowski, @jtpio)
• Fix filebrowser:create-new-file context menu selector #18588 (@jtpio, @krassowski)
• Fix status bar focus outlines #18585 (@IsabelParedes, @krassowski)
• Prevent split/merge on non-editable cells #18579 (@MUFFANUJ, @krassowski)
• Fix single-character code blocks rendering as empty #18572 (@soniya-malviy, @krassowski)
• Hide code input in CodeConsole when configured #18554 (@agriyakhetarpal, @krassowski)
• Use a font size and family specified in CSS for DataGrids #18542 (@krassowski, @Carreau, @brichet)
• Fix font-family application across UI components and remove a single hard-coded usage #18541 (@krassowski, @Carreau, @jtpio)
• Fix comms subshell resource management on disposal and when changing settings #18531 (@krassowski, @Carreau, @Copilot, @ianthomas23)
• Fix theme settings broken in non-English locales #18530 (@apoorvdarshan, @krassowski)
• Replace scrollback implementation with scroll anchoring outside of full windowing mode #18522 (@krassowski, @jasongrout)
• Fix XSRF cookie selection to use last matching value for duplicate paths #18518 (@reteps, @claude, @krassowski)
• Only turn off overflow anchor when windowing is active #18503 (@jasongrout, @krassowski)
• Upgrade @codemirror/view, fixing slow selection when line wrapping is enabled #18479 (@krassowski, @jasongrout)
• Prevent file browser from stealing focus on refresh #18478 (@MUFFANUJ, @krassowski)
• Avoid using system clipboard in Notebook widget #18474 (@brichet, @krassowski)
• Update CodeMirror versions, fixing a few selection issues #18466 (@krassowski, @jasongrout)
• Fix debugger variable panel to render value 0 properly #18464 (@itsmevichu, @krassowski)
• Bump Lumino packages to the 2026.2.5 release, fixing iframe resizing #18440 (@jasongrout, @krassowski)
• Fix persistent text highlight in inactive cells #18438 (@MUFFANUJ, @krassowski)
• Fix table of contents navigation for Markdown files #18411 (@itsmevichu, @krassowski)
• Consider both the content type and pattern match in DocumentRegistry.getFileTypeForModel() #18409 (@krassowski, @jasongrout, @martinRenou)
• Fix CVE-2025-13465 in lodash and lodash-es #18400 (@ktaletsk, @jtpio, @krassowski)
• Check Python version compatibility in Extension Manager #18393 (@MUFFANUJ, @krassowski)
• false in saveAs to avoid fetching file body #18379 (@DeborahOlaboye, @jasongrout)
• Fix focus of replace buttons in the document search box #18362 (@IsabelParedes, @krassowski)
• Fix deferred cell loading in defer and contentVisibility windowing mode #18359 (@krassowski, @Darshan808)
• Fix error in console when the debugger switch from a module to another #18352 (@brichet, @krassowski)
• Fix "Open With > Editor" for .py files, update @lumino packages to v2026.1.15 #18349 (@krassowski, @jasongrout)
• Update CodeMirror to latest versions #18344 (@krassowski, @Darshan808, @jasongrout)
• Describe kernelPreference and kernel command args #18337 (@jtpio, @krassowski)
• Fix empty math block throws codemirror's error #18308 (@i-aki-y, @Darshan808, @krassowski)
• Fix cell footer width for smaller screens #18276 (@MUFFANUJ, @Darshan808, @krassowski)
• Update to Rspack 1.7.0-beta.1 #18267 (@jtpio, @jasongrout, @krassowski)
• Make system clipboard opt-in when performing copy/cut/paste of cells #18250 (@Darshan808, @krassowski)
• Make file browser listings respect the UI font size when renaming files #18249 (@agriyakhetarpal, @krassowski)
• Fix WebSocket _onWSClose handler: do not ignore close codes #18243 (@Akshitguptaa, @jianyexi, @krassowski)
• Fix console commands enabled status if not in main area #18238 (@brichet, @krassowski)
• Fix merge breaking rendering cell order in defer mode #18220 (@krassowski, @brichet)
• Fix inverted Unicode surrogate checks #18209 (@JamesWrigley, @krassowski)
• Fix scrolling to anchor from ToC/links in Markdown and HTML with data attributes #18208 (@pranshugupta01, @brichet, @krassowski)
• Fix search icon styling in command palette #18202 (@Meriem-BenIsmail, @jtpio, @krassowski)
• Fix scrollPastEnd for text editors #18186 (@Meriem-BenIsmail, @krassowski)
• Restore focus after closing the command palette #18167 (@Meriem-BenIsmail, @jasongrout, @krassowski)
• Enable undo/redo in JSON settings editor #18165 (@Meriem-BenIsmail, @krassowski)
• Allow adding shortcuts to commands without a default shortcut via UI #18163 (@brichet, @krassowski)
• Fix: Safely handle missing args in fileeditor:change-font-size label provider #18157 (@prajyot-porje, @Darshan808, @krassowski)
• Show rename dialog for new files moved before saving #18145 (@anafontan, @Darshan808, @ZhYGuoL, @jtpio)
• Fix Notebook Debugger: Missing Current-Line Highlight #18140 (@arjxn-py, @RRosio, @martinRenou)
• Debugger: Handle the case for editor being null #18124 (@martinRenou, @krassowski)
• ToolbarButtonComponent and CommandToolbarButtonComponent: add AriaMenuButtonProps to allow ARIA menu-button attributes #18118 (@agriyakhetarpal, @krassowski)
• Debugger: Fix restart and debug command. #18115 (@HaudinFlorence, @RRosio, @brichet, @krassowski, @martinRenou)
• Respect the activate option when opening document widgets #18114 (@brichet, @krassowski)
• Restore auto-resizing of the code console input prompts #17819 (@jtpio, @Darshan808, @agriyakhetarpal, @krassowski)
• Fix inconsistent state updates of toolbar buttons #17230 (@MUFFANUJ, @krassowski)
• Update aria-pressed state for ToolbarButton when pressed #17222 (@MUFFANUJ, @krassowski)

Maintenance and upkeep improvements

• Fix flaky 'Switch back and forth to reference page' test #19043 (@krassowski, @MUFFANUJ)
• Stabilize subpixel editor line shift on Welcome screenshot #19039 (@krassowski, @MUFFANUJ)
• Update @jupyter/ydoc to final 4.0 #19034 (@krassowski)
• Split external link checks and only run if diff includes a URL #19029 (@MUFFANUJ, @krassowski)
• Baseline spelling cleanup for docs and README files #19025 (@MUFFANUJ, @krassowski)
• Make docs dependencies a dependency group #19024 (@MUFFANUJ, @bollwyvl, @krassowski)
• Update @jupyter/ydoc v4.0.0-b1 #19023 (@davidbrochart, @krassowski)
• Drop setuptools dependency #19020 (@krassowski, @Darshan808, @MUFFANUJ, @bollwyvl)
• Workaround flaky test for scrolling on page down in windowed notebook #19004 (@krassowski, @MUFFANUJ)
• Some linting improvements from the Scientific Python style guide #18990 (@Darshan808, @krassowski)
• Add tests for the readonly indicator #18982 (@jtpio, @krassowski)
• Update minimum mermaid to 11.15.0 and marked 17.0.6 #18958 (@bollwyvl, @krassowski)
• Ignore conda.io in addition to docs.conda.io #18954 (@krassowski, @Darshan808, @MUFFANUJ)
• Fix completer test failures on CI #18946 (@krassowski, @brichet)
• Update to Playwright 1.60 #18939 (@jtpio, @krassowski)
• Fix path navigator font and breadcrumbs test #18927 (@krassowski, @jtpio)
• Fix flaky example UI snapshot test by disabling cursor blinking #18925 (@tsharma-dev, @krassowski)
• Fix flaky test: wait for kernel startup before pressing Shift+Enter #18924 (@krassowski, @jtpio)
• Wait for cell toolbar before snapshot in markdown tests #18922 (@krassowski, @jasongrout)
• Hash-pin all GitHub Actions #18912 (@krassowski, @jtpio)
• Adopt eslint-plugin-regexp #18908 (@krassowski, @Darshan808, @bollwyvl)
• Harden GitHub actions #18901 (@krassowski, @Yann-P)
• Point to GitHub repo for shellcheck for now #18899 (@krassowski, @Darshan808)
• Add zizmor GitHub Actions security linter #18898 (@krassowski, @Yann-P)
• Harden galata update workflow #18896 (@krassowski, @Yann-P)
• Bump jupyter-builder to v1.0.0b1 #18895 (@Darshan808, @krassowski)
• Ignore links to docs.conda.io since it returns 503 often #18890 (@krassowski, @afshin)
• Fix build:prod:minimize:* and build:stats scripts after rspack 2.0 upgrade #18882 (@krassowski, @Darshan808)
• Bump @jupyter/eslint-plugin to v1 #18863 (@Darshan808, @krassowski)
• Add ShellCheck linting for scripts and docs #18858 (@MUFFANUJ, @krassowski)
• Enable no-explicit-any with bootstrap suppressions #18847 (@MUFFANUJ, @krassowski)
• Fix labeler spec to v6.1.0 not v6.1 #18844 (@krassowski, @jtpio)
• Bump required labeler action to v6.1 #18842 (@krassowski, @jtpio)
• Remove @jupyterlab/builder package and all references to it #18841 (@Darshan808, @jtpio, @krassowski)
• Drop serial mode from galata test suite #18838 (@krassowski, @MUFFANUJ)
• Remove vendored yarn.js #18823 (@bollwyvl, @Darshan808, @krassowski)
• Fix linting issue #18819 (@krassowski, @jtpio)
• Only download the merged blobs on re-runs #18801 (@krassowski, @MUFFANUJ)
• Allow to run a subset of UI test (once or more) from GitHub Actions UI #18800 (@krassowski, @Copilot, @MUFFANUJ)
• Expose link to UI tests report in comment with Binder link #18798 (@krassowski, @MUFFANUJ)
• Update to jupyter-builder>=0.0.8 #18792 (@jtpio, @Darshan808, @krassowski)
• Remove unused CodeMirror v5 CSS rule #18785 (@Carreau, @krassowski)
• Remove unused Extension Manager CSS rules, add regression test #18784 (@Carreau, @krassowski)
• Bump @jupyter/eslint-plugin and fix lint #18781 (@Darshan808, @krassowski)
• Tell dependabot to ignore updates to staging directory as that is updated on release #18776 (@krassowski, @Copilot, @MUFFANUJ)
• Remove unused CSS rule forgotten after CodeMirror migration #18763 (@Carreau, @krassowski)
• Remove dead .jp-VariableRenderer-TrustButton CSS rule #18762 (@Carreau, @krassowski)
• Remove used .jp-Cell-Placeholder CSS rules #18761 (@Carreau, @krassowski)
• Remove unused progress bar CSS rule in execution indicator #18759 (@Carreau, @krassowski)
• Workaround issue with merging shards on rerun of visual regression tests #18742 (@krassowski, @jtpio)
• Use @jupyter/builder instead of @jupyterlab/builder #18723 (@Darshan808, @jtpio, @krassowski)
• Pin playwright in merge reports step of visual regression testing #18711 (@krassowski, @jtpio)
• Update to Playwright 1.59 #18710 (@jtpio, @krassowski)
• Debugger: Drop duplicate snapshots from debugger tests. #18690 (@HaudinFlorence, @krassowski)
• Fix debugger documentation snapshots and update docs #18688 (@krassowski, @HaudinFlorence, @bittoby)
• Implement updating JSON snapshots via new snapshots bot #18658 (@krassowski, @jtpio)
• Add tests for single-click navigation in filebrowser #18632 (@RRosio, @krassowski)
• Show git status on CI when integrity check fails #18630 (@krassowski, @jasongrout)
• Merge documentation job into the sharded galata job #18629 (@krassowski, @jasongrout)
• Upload standalone playwright report for instant preview #18628 (@krassowski, @jasongrout)
• Update to Rspack 1.7.8 #18622 (@jtpio, @krassowski)
• Update CI install to use uv pip over pip #18621 (@krassowski, @jtpio)
• Update to mermaid 11.13.0 and marked 17.0.4 #18617 (@bollwyvl, @krassowski)
• Include @jupyter/eslint-plugin #18615 (@Darshan808, @krassowski)
• Enforce that certain CSS rules use variables #18614 (@lin9long, @krassowski)
• Remove explicit timeouts in terminal playwright tests #18610 (@amanparganiha, @krassowski)
• Fix Playwright browser cache in linuxtests workflow #18603 (@rodrigosf672, @claude, @krassowski)
• Bump svgo from 3.3.2 to 3.3.3 #18601 (@krassowski)
• Update to Rspack 1.7.7 #18591 (@jtpio, @krassowski)
• Bump minimatch from 3.1.2 to 3.1.5 in /jupyterlab/tests/mock_packages/test-hyphens-underscore #18581 (@krassowski)
• Bump minimatch from 3.1.2 to 3.1.5 in /jupyterlab/tests/mock_packages/test_no_hyphens #18580 (@krassowski)
• Bump actions/cache from 4 to 5 in the actions group #18578 (@krassowski)
• Bump minimatch from 3.0.5 to 3.1.4 #18573 (@krassowski)
• Install playwright browsers without dependencies #18568 (@krassowski, @jasongrout)
• Do not show banner in console when testing with galata (for now) #18564 (@krassowski, @jtpio, @peytondmurray)
• Add workflow for updating visual regression snapshots from artifacts #18559 (@krassowski, @jtpio)
• Make documentation snapshot update job use update-snapshots-checkout #18550 (@krassowski, @jasongrout)
• Update benchmark snapshots even if base snapshots require changes #18549 (@krassowski, @brichet)
• Upgrade verdaccio from v5.33.0 to v6.2.5 #18545 (@krassowski, @jasongrout)
• Drop systeminformation dependency in favor of Node.js native os module #18544 (@krassowski, @brichet)
• Add language packs for French and Chinese to binder env #18534 (@krassowski, @jasongrout)
• Add @jupyterlab/core-meta package for core metadata #18528 (@Darshan808, @krassowski)
• Update to marked 17.0.2 and mermaid 11.12.3 #18526 (@bollwyvl, @krassowski)
• Debugger: delete the thread from the stopped before sending the 'continue' request #18509 (@brichet, @HaudinFlorence, @krassowski)
• Fix flaky completer tokens test #18506 (@krassowski, @jasongrout)
• Fix a few issues in config tests #18496 (@krassowski, @jasongrout)
• Fix more flaky tests #18495 (@krassowski, @jasongrout)
• Fix CodeQL self warnings #18494 (@krassowski, @jasongrout)
• Fix continued flakiness in 'Search in multiple selected cells' test #18493 (@jasongrout, @krassowski)
• Fix flaky subshell test #18492 (@krassowski, @jasongrout)
• Fix flaky search test by working around bug #18488 (@jasongrout, @krassowski)
• Fix useless conditionals noted by GitHub CodeQL #18486 (@jasongrout, @krassowski)
• Fix useless assignments to local variables noted by GitHub CodeQL #18485 (@jasongrout, @krassowski)
• Update locking workflow #18477 (@jasongrout, @krassowski)
• Bump webpack from 5.99.6 to 5.105.0 in /jupyterlab/tests/mock_packages/test_no_hyphens #18472 (@krassowski)
• Update to Rspack 2.0 #18467 (@jtpio, @Darshan808, @chenjiahan, @jasongrout, @krassowski)
• Make Python tests run faster on CI #18454 (@krassowski, @jasongrout)
• Fix flaky UI tests #18453 (@krassowski, @Copilot, @jasongrout)
• Fix pre-commit prettier entry after upgrade to a new version #18452 (@krassowski, @brichet)
• Bump webpack from 5.99.6 to 5.105.0 in /jupyterlab/tests/mock_packages/test-hyphens-underscore #18449 (@jasongrout, @krassowski)
• Turn on verbatimModuleSyntax #18446 (@jasongrout, @krassowski)
• Use past tense in README when referencing JupyterLab 3 security fixes #18435 (@krassowski, @jasongrout)
• Migrate ESLint to v9 #18434 (@Darshan808, @bollwyvl, @jtpio, @krassowski)
• Update to Rspack 1.7.5 #18432 (@jtpio, @jasongrout, @krassowski)
• Use sharding for faster visual regression/integration tests #18427 (@krassowski, @bollwyvl, @jasongrout)
• Bump the actions group with 8 updates #18424 (@krassowski)
• Turn on Typescript noImplicitThis option and fix errors #18423 (@jasongrout, @aaron-seq, @krassowski)
• Turn on Typescript strictBuiltinIteratorReturn and fix errors #18421 (@jasongrout, @krassowski)
• Update prettier, use cache and parallel CLI options #18420 (@bollwyvl, @jasongrout)
• Turn on Typescript strictBindCallApply option #18418 (@jasongrout, @krassowski)
• Turn on the Typescript alwaysStrict option #18414 (@jasongrout, @jtpio)
• Bump lodash-es from 4.17.21 to 4.17.23 in /jupyterlab/tests/mock_packages/test-hyphens-underscore #18408 (@jtpio)
• Upgrade to Typescript 5.9 #18402 (@jasongrout, @jtpio)
• Update to Playwright 1.58.0 #18391 (@jtpio, @krassowski)
• Update release instructions #18375 (@jasongrout, @krassowski)
• Bump lodash-es from 4.17.21 to 4.17.23 in /jupyterlab/tests/mock_packages/test_no_hyphens #18371 (@krassowski)
• Bump diff from 5.1.0 to 5.2.2 #18364 (@krassowski)
• Update to Rspack 1.7.3 #18360 (@jtpio, @krassowski)
• Remove generated docs files from the repo #18340 (@jtpio, @krassowski)
• Bump ruff target to py310 #18339 (@jtpio, @krassowski)
• Fix UI tests: config useSystemClipboardForCells=true for notebook toolbar test #18335 (@brichet, @krassowski)
• Use reusable workflow action for checking permissions in the update-snapshots bot #18334 (@martinRenou, @krassowski)
• Bump to Rspack 1.7.2 #18333 (@jtpio, @krassowski)
• Bump node-forge from 1.3.1 to 1.3.3 #18329 (@krassowski)
• Bump vega-selections from 5.6.0 to 5.6.3 #18315 (@krassowski)
• Update to Rspack 1.7.1 #18312 (@jtpio, @krassowski)
• Update to Rspack 1.7.0 #18300 (@jtpio, @Darshan808, @krassowski)
• Fix the path of the uploaded artifiacts of galata report #18288 (@brichet, @Darshan808, @krassowski)
• Fix command palette accessibility test #18255 (@krassowski, @brichet)
• Make the plugin registry slow activation test more robust #18254 (@krassowski, @Darshan808)
• Update ui test triggers #18248 (@jasongrout, @Zsailer)
• Remove unused snapshot #18224 (@brichet, @jtpio, @krassowski)
• Bump systeminformation from 5.23.14 to 5.27.14 #18223 (@brichet, @krassowski)
• Prevent updating npm next tag for some versions of @jupyterlab/rendermime-interfaces #18217 (@jtpio, @krassowski)
• Update to python 3.14, remove python 3.9 #18216 (@jasongrout, @brichet, @krassowski)
• Check if the list of commands, tokens and plugins has changed #18198 (@jtpio, @krassowski)
• Bump jws from 3.2.2 to 3.2.3 #18171 (@krassowski)
• Revert "Add the 'jupyterlab' entry point" #18166 (@jtpio, @jasongrout)
• Update to Playwright 1.57.0 #18151 (@jtpio, @krassowski)
• Prevent some supply-chain attack vectors #18142 (@jasongrout, @krassowski, @mfisher87)
• Linter: enforce "import type" when applicable #18129 (@martinRenou, @jasongrout, @jtpio, @krassowski)
• Update to ruff==0.14.10 and other pre-commit updates #17838 (@jtpio)
• Add tests for browser window's selection #17718 (@MUFFANUJ, @Darshan808, @krassowski)
• Switch from webpack to rspack for bundling #16005 (@jtpio, @FoSuCloud, @chenjiahan, @erkin98, @jasongrout, @krassowski, @xc2)

Documentation improvements

• Update user-facing changelog for 4.6.0 RC #19019 (@krassowski, @Yann-P)
• Clarify TypeScript watch builds in documentation #18979 (@nightcityblade, @Darshan808, @krassowski)
• Fix typo in contributing docs #18971 (@TheChyeahhh, @krassowski)
• Fix typo in LSP documentation #18970 (@TheChyeahhh, @MUFFANUJ, @krassowski)
• Fix duplicated sentence in showJumpToRecentExecutionButton description #18969 (@TheChyeahhh, @krassowski)
• Fix typo in a shell test description #18968 (@TheChyeahhh, @krassowski)
• Mention JupyterLab 4.6.0 beta in installation guide and via a banner #18941 (@krassowski, @jtpio)
• User-facing changelog for 4.6 release #18932 (@krassowski, @jtpio)
• Migrate Move Sections documentation to interface_customization.md #18918 (@Darshan808, @krassowski)
• Add jupyter-builder section in Extension Migration guide #18904 (@Darshan808, @krassowski)
• Update documentation snapshot docs and document new CI trigger #18886 (@krassowski, @brichet)
• Add merge driver for png files #18885 (@krassowski, @brichet)
• Improve loading of interactive examples in documentation #18828 (@krassowski, @MUFFANUJ)
• Fix name of option for extension manager implementation in docs #18788 (@krassowski, @jtpio)
• Remove 4.5.0 announcement from docs #18740 (@krassowski, @Carreau)
• Fix notebook factory plugin description #18675 (@krassowski, @brichet)
• Fix a typo in documentation [skip ci] #18625 (@davidbrochart, @krassowski)
• Add default labels and behavior documentations for dialog buttons #18604 (@MUFFANUJ, @krassowski)
• Remove enableImmutableInstalls from docs #18586 (@MUFFANUJ, @krassowski)
• Add missing build step in services browser example README #18569 (@u-wlkjyy, @krassowski)
• Revise team section in README with governance updates #18483 (@krassowski, @andrii-i, @jasongrout)
• Fix inconsistent JupyterLab capitalization #18450 (@RamiNoodle733, @krassowski)
• Disclose AI usage in PR template #18413 (@jasongrout, @krassowski, @ktaletsk)
• Fix Contents API fetch documentation of the content default #18383 (@ceasermikes002, @brichet, @jasongrout, @krassowski)
• Add installation instructions for JupyterLab with uv #18363 (@jimangel, @krassowski)
• Add AI rules #18322 (@jtpio, @andrii-i, @jasongrout, @krassowski)
• Clarify notebook and cell metadata API changes in JupyterLab 4 #18304 (@Krish-876, @krassowski)
• Add documentation of autosave option #18283 (@MUFFANUJ, @Darshan808, @jtpio, @krassowski)
• Document workspace selector and TopBar extension point #18272 (@Krish-876, @krassowski)
• Allow to zoom in/out individual widgets with ctrl + mouse wheel #18263 (@Meriem-BenIsmail, @RRosio, @krassowski)
• Document a change in the Code Editor source updates via sharedModel in JupyterLab 4 #18260 (@Krish-876, @krassowski)
• Document proxy environment variables for extension manager #18259 (@Krish-876, @krassowski)
• Fix broken see-also reference for inspect_request message #18234 (@Krish-876, @krassowski)
• Docs: clarify edit mode vs command mode in notebooks #18222 (@harshaagrawal20, @krassowski)
• Update announcement and installation instructions post 4.5.0 final release #18125 (@krassowski, @jtpio, @ktaletsk)
• Clean up old references to restructured text #18123 (@jtpio, @krassowski)
• Add plotting and visualization documentation #18094 (@MMesch, @Darshan808, @krassowski)
• Allow moving widgets to different areas #17880 (@jtpio, @krassowski)

Other merged PRs

• Bump markdown-it from 14.1.0 to 14.2.0 #19041 (@krassowski)
• Bump form-data from 4.0.5 to 4.0.6 #19040 (@krassowski)
• Bump dompurify from 3.4.0 to 3.4.10 #19037 (@krassowski)
• Bump @babel/core from 7.21.0 to 7.29.6 #19036 (@krassowski)
• Bump @tootallnate/once from 2.0.0 to 2.0.1 #18930 (@krassowski)
• Bump ws from 8.18.1 to 8.20.1 in /jupyterlab/tests/mock_packages/test_no_hyphens #18913 (@krassowski)
• Bump brace-expansion from 5.0.3 to 5.0.6 #18900 (@brichet, @krassowski)
• Bump mermaid from 11.13.0 to 11.15.0 #18872 (@bollwyvl, @krassowski)
• Bump @babel/plugin-transform-modules-systemjs from 7.20.11 to 7.29.4 #18861 (@brichet)
• Bump fast-uri from 3.0.6 to 3.1.2 #18860 (@brichet, @krassowski)
• Bump axios from 1.8.2 to 1.16.0 #18843 (@krassowski)
• Bump postcss from 8.4.38 to 8.5.12 in /jupyterlab/tests/mock_packages/test_no_hyphens #18821 (@krassowski)
• Bump postcss from 8.5.6 to 8.5.12 #18805 (@krassowski)
• Bump postcss from 8.4.38 to 8.5.12 in /jupyterlab/tests/mock_packages/test-hyphens-underscore #18793 (@krassowski)
• Bump follow-redirects from 1.15.11 to 1.16.0 #18783 (@krassowski)
• Bump dompurify from 3.3.3 to 3.4.0 #18775 (@krassowski)
• Bump lodash-es from 4.17.23 to 4.18.1 in /jupyterlab/tests/mock_packages/test_no_hyphens #18720 (@brichet)
• Bump lodash-es from 4.17.23 to 4.18.1 #18719 (@brichet, @krassowski)
• Bump lodash-es from 4.17.23 to 4.18.1 in /jupyterlab/tests/mock_packages/test-hyphens-underscore #18718 (@brichet)
• Bump lodash from 4.17.21 to 4.18.1 in /jupyterlab/tests/mock_packages/test-hyphens-underscore #18717 (@brichet)
• Bump lodash from 4.17.21 to 4.18.1 in /jupyterlab/tests/mock_packages/test_no_hyphens #18716 (@brichet)
• Bump path-to-regexp from 0.1.12 to 0.1.13 #18697 (@krassowski)
• Bump brace-expansion from 1.1.12 to 1.1.13 #18692 (@krassowski)
• Bump picomatch from 2.3.1 to 2.3.2 #18678 (@krassowski)
• Bump flatted from 3.4.1 to 3.4.2 #18669 (@krassowski)
• Bump socket.io-parser from 4.2.4 to 4.2.6 #18651 (@krassowski)
• Bump flatted from 3.3.3 to 3.4.1 #18641 (@krassowski)

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)

@aaron-seq (activity) | @aarondr77 (activity) | @afshin (activity) | @agriyakhetarpal (activity) | @Akshitguptaa (activity) | @AliMahmoudDev (activity) | @altis0725 (activity) | @amanparganiha (activity) | @anafontan (activity) | @andrii-i (activity) | @apoorvdarshan (activity) | @arjxn-py (activity) | @arun-357 (activity) | @autodots-AHassan (activity) | @aviu16 (activity) | @bittoby (activity) | @bollwyvl (activity) | @boskodev790 (activity) | @brichet (activity) | @Carreau (activity) | @ceasermikes002 (activity) | @chenjiahan (activity) | @claude (activity) | @cmarmo (activity) | @Copilot (activity) | @CrafterKolyan (activity) | @cursoragent (activity) | @Darshan808 (activity) | @davidbrochart (activity) | @DeborahOlaboye (activity) | @dhgoal (activity) | @doshi-kevin (activity) | @erkin98 (activity) | @fcollonval (activity) | @filipeoliveira05 (activity) | @flaviomartins (activity) | @fleming79 (activity) | @FoSuCloud (activity) | @frenzymadness (activity) | @github29tani (activity) | @GlassOfWhiskey (activity) | @harshaagrawal20 (activity) | @HaudinFlorence (activity) | @hroncok (activity) | @i-aki-y (activity) | @ianhi (activity) | @ianthomas23 (activity) | @IsabelParedes (activity) | @itsmejay80 (activity) | @itsmevichu (activity) | @JamesWrigley (activity) | @jasongrout (activity) | @JasonWeill (activity) | @jayaprajapatii (activity) | @JaYRaNa213 (activity) | @jianyexi (activity) | @jimangel (activity) | @jtpio (activity) | @krassowski (activity) | @Krish-876 (activity) | @ktaletsk (activity) | @lin9long (activity) | @linlol (activity) | @martinRenou (activity) | @Meriem-BenIsmail (activity) | @mfisher87 (activity) | @MMesch (activity) | @moktamd (activity) | @MUFFANUJ (activity) | @nightcityblade (activity) | @nthiery (activity) | @peytondmurray (activity) | @prajyot-porje (activity) | @pranshugupta01 (activity) | @raffaelemancuso (activity) | @RamiNoodle733 (activity) | @reteps (activity) | @rodrigosf672 (activity) | @RRosio (activity) | @schmidi314 (activity) | @Siddhazntx (activity) | @soniya-malviy (activity) | @statxc (activity) | @superlevure (activity) | @SylvainCorlay (activity) | @TheChyeahhh (activity) | @tmetzl (activity) | @tsharma-dev (activity) | @tubaman (activity) | @u-wlkjyy (activity) | @utsav-develops (activity) | @xc2 (activity) | @Yahiewi (activity) | @Yann-P (activity) | @ZhYGuoL (activity) | @Zsailer (activity)