For example, the Lab URL for plot_1_exp.ipynb from one of the recent PRs (#1410) works, but the corresponding URL for the Notebook interface does not, which will be fixed in this PR to point to the correct URL.

Thank you!

Thanks for the review!

Yes, this was indeed the case – the last instance of retrolab existing was prior to Notebook 4 here: https://github.com/jupyterlite/jupyterlite/blob/fa5f44ff3f0eec2c75cada62fa659f13c9f26ab0/packages/retro-application-extension/src/index.ts#L73

So your assessment is right, it was dropped with jupyterlite/jupyterlite#1019

CI failures should be fixed by #1416

We should probably add/update jupyterlite min pin to 0.4.2 then, since it seems like that was the release with the linked PR. Or maybe we at least need some doc update?

Also our CIs (.github/install.sh and .circleci/config.yml) appear to use "jupyterlite-sphinx>=0.8.0,<0.9.0" which is pretty old, they're on 0.17 now. We should probably update that, too, and make sure that CircleCI looks okay. @agriyakhetarpal do you want to give it a try?

Ah, thank you for fixing the CI failures before I was able to! :)

I agree with both adding a minimum version for JupyterLite and updating the docs about it – just pushed the relevant changes via 821d17d and 616e547. Suggestions on improving the documentation are appreciated. I think it could make sense to move the sentence to an admonition too.

Minor points about jupyterlite-sphinx and the surrounding jupyterlite-pyodide-kernel dependencies: we released version 0.17.1 for the former which fixed a metadata issue with 0.17.0, so I would recommend that as the minimum here; for the latter, I would recommend dropping the upper bound, since both the Pyodide version and micropip are bound to jupyterlite-pyodide-kernel and users might not be able to find that out themselves without a few rounds of searching online.

Also, jupyterlite-sphinx pins jupyterlite-core, and this pin is relaxed with each new release of JupyterLite, so sphinx-gallery will receive a higher/supported version as a transitive dependency.