Which app is this?

I dont think so - but from scanning the document i don't think its upgrading within a connection but only impacting future requests.

doing this I indeed found some bugs and other inconsistent behavior of our libraries - it really added some amount of value besides the obvious

Does it do everything right? no. Is it good a writing bug free code? no. Is it good at writing the code where everyone knows how its supposed to look like but somebody has to do it? hell jeah - reviewing such code is so much faster than writing it.

Jeah I thought it was just rainy 🙈