Honestly if you never had to deal with more than one lifetime parameter per function and/or type, good for you! As for what 'de is used for in serde — it’s the lifetime of the data you’re deserializing. It’s not really relevant unless you’re deserializing borrowed data, which is very very rarely the case, especially when it comes to web development which I’m guessing you’re most familiar with

But typst itself is fully open-source. Saying it’s a „partially open-source project” is a mischaracterization. You don’t need to use the web IDE and it’s not strictly part of the „typst project”

NixOS everywhere (except for one server which I have yet to migrate from Rocky to NixOS)