@angel If you’re adding a completely new hostless package, there are few places in the codebase where the package name must be added/referenced. If you just need to make an existing hostless package (e.g. as defined in platform/canvas-packages/hostlessList.json) available when self hosting, you can:
Create a new blank project
Make sure it’s viewable for external users
Manually update the URL to https://my-local-plasmic/projects/``<project-id>?setHostLessProject=true to show the hostless submit form
Enter the package name (e.g. fetch), and npm name (e.g. @plasmicpkgs/fetch) and submit
Add an entry to devflags
The process is somewhat tedious, but only needs to be done once per package. I’ll see if we can get some docs added to the repo.