It is a vs code extension which open intellij merge tool on conflicted file.
after getting conflict by merge, you can right mouse click on conflicted file and click on mege with intellij first time you have to set any intellij tool path like:
/Applications/WebStorm.app/Contents/MacOS/webstorm
then you will get intellij mege tool.
open intellij merge tool on conflicted file from VS code
MIT © Numan