FR: Is there a way to use jj programatically?

[jdmarshall]

Is your feature request related to a problem? Please describe.

Providing a GUI for JJ, but ideally also to be able to use JJ as backing store for document edits (eg, wiki edit history)

Describe the solution you'd like
API for performing actions with jj, instead of trying to wrap the CLI.

Describe alternatives you've considered

Additional context
Add any other context or screenshots about the feature request here.

[matts1]

There's a fair amount of existing discussions in this area.
#3034 and #3601 discuss how to go about it

https://github.com/gulbanana/gg is a gui for jj that uses the jj-lib crate under the hood. In the long term, I'd like to stop people from being able to use the jj-lib crate's internals directly by providing a proper, formal API that is well-documented and stable, but for now it's the only way to do so.

[ilyagr]

Another option is to use the CLI and templates, like https://github.com/noahmayr/vjj

[matts1]

I'll close this since it seems to be a duplicate of #3034