Oh so Google is finally releasing their VCS system I hear so much about. Well it’s Jj not Piper but it looks like Jj will eventually replace Piper and if half the things I’ve heard about Piper are true it will be very successful.
CLAs are generally a statement that you ensure code you contribute is acceptable by the licensing and legal things around them.
They don't want to accidentally bring in GPL-3 or private code into an Apache licensed project, and my understanding is this is a self-certifying statement that you won't and have full rights to make the contributions
