It will be fun to do a search on the next release of Terraform for code which I have written while not under contract with HashiCorp (I am still the #8 all time contributor according to GitHub, despite not having worked on it since ~2017-8, when non-employed maintainers were summarily removed from projects by a middle manager).
I have not and will not sign anything which assigns copyright for OSS (even to the FSF), so it will be interesting to see whether all of that code has been rewritten.