developer guide
Publishing extensions
Ship your extension to users through a repository.
Package
Run the build script to produce a signed .rextx package. The package embeds your manifest and a checksum that repositories and clients verify on install.
Publish to a repository
Host the package anywhere reachable by URL and add an entry to your repository manifest. To submit to the official repository, open a pull request against the repository index on GitHub — submissions are reviewed for safety and manifest correctness.
Shipping updates
Bump the version in your manifest, rebuild, and update the repository entry. Users see the update in their Extensions tab within the next repository refresh.