Thank you for raising this important issue, Yaroslav Halchenko.
In fact, Amara is no longer open source, as announced by Dean Jansen in Why We are Closing Amara’s Source Code (Amara's blog, January 13, 2020)
Cordially
Claude Almansi
https://github.com/pculture/unisubs is no longer there. I do not spot any "development" or "source" related on https://amara.org/en/volunteer/ . So, is amara still open source or gone dark?
Francois Liot
Where can we find the source code of Amara project ?
Any documentation on how to extend the editor ?
Thanks in advance,
Francois