> AIUI the forks are required because Microsoft is gatekeeping functionality used by Copilot from extensions so they can't be used by these agents. reply

I always wonder how this works legally. VSCode needs to comply with the LGPL (it's based on Chromium/Blink which is LGPL) ; they should provide the entire sources that allow us to rebuild our own "official" VSCode binary

I think that MS provides these extensions as plugins. The core of VSCode is OSS, it's the extra bits that have a different license.