I see there are clear instructions on how to export an Anvil app to use the open source runtime.
But are there step-by-step instructions available for how to go in the opposite direction, starting from an app you’ve created locally in a text editor and importing it into the Anvil IDE?
Run git init in your code directory.
Create a new app at anvil.works.
Get the clone link for that app and add its url as a new remote to your local git repo.
Commit and Force push your local repo to anvil.
(sorry if that’s a little brief. I’m on my phone)
Step 3 above should create a local repository and a working folder tree. Before step 4, copy your text files into their proper locations in that tree.