Don't Download Unless You Are A Developer. This is automatically included in the DH mod jar.
Putting this in your Mods folder will do nothing.
This jar includes the source code and classes needed to interact with Distant Horizons in a Minecraft and mod loader independent way. This jar should be used during development instead of the full Distant Horizons jar to prevent accidentally using unsafe internal methods.
The example projects on GitLab contains all the basics you need to get started using the API.
https://gitlab.com/distant-horizons-team/distant-horizons-api-example
API JavaDocs
https://distant-horizons-team.gitlab.io/distant-horizons/
Developer Wiki
https://gitlab.com/distant-horizons-team/distant-horizons/-/wikis/home
Discord
In case you have any questions or issues not addressed in the above two documents.
https://discord.gg/xAB8G4cENx
Issues
If you find any bugs or want to request a new feature, for the API, please use the main Distant Horizons GitLab issue page.
https://gitlab.com/distant-horizons-team/distant-horizons/-/issues
Conversation