Question

i would love to be able to create custom script for various tasks (invert, mirror, transform, etc...). Something simple, but which permit users to create and share tools for a more personalized workflow...

Answer 1

+1 here.

I need something like "User Extension" like them https://s1toolbox.com/studioonescripts or like Reaper can do.

But only four votes in four years.
It is very sad to think that this request will never happen...

I think what this shows is that the user needs for the software and the concept or appeal of the software is not for advanced users.

We need to consider other software such as Ableton Live or Reaper, but as a Studio One fan, it is an unbearable choice.