Right, so our goal was to allow configuring the bundle with app icons etc and importantly custom URL schemes and file types [1]. And then macOS- [2] and Windows- [3] specific launchers capture the "open file" and "open url" events and trigger the Elixir side of things. Another reason for native launchers is if for any reason we couldn't start the Elixir side, we want to let the user know that something went wrong and point to logs. (We have that on Mac and will have on Windows very soon.)

[1]: https://github.com/livebook-dev/livebook/blob/920f70817efbac...

[2]: https://github.com/livebook-dev/livebook/blob/920f70817efbac...

[3]: https://github.com/livebook-dev/livebook/blob/920f70817efbac...