At Google there is a process where if you want to submit e.g. a patch to a FOSS project on github, you need to send it to some team that reviews it for conflict

At Google there is a process where if you want to submit e.g. a patch to a FOSS project on github, you need to send it to some team that reviews it for conflicts of interest first. There is another process for releasing your own software publicly where you need to ask permission to retain ownership of the IP because the default is for it to go to Google. When you join, you need to list IP that you owned before joining in order for it to be exempt from the process. I have heard that these clauses are unenforceable, yeah, but that doesn't mean that these employees (who seem to mostly be fairly junior) aren't going to be in hot water if this page gets back to whatever part of the company is responsible for attempting to enforce them.