Useful read. One thing I add for engineers at any level: ladders describe scope, but promotions are mostly evidence. Keep a short win log every month so you have real examples when it matters.

Good thread. For mentees learning git, I would start with a clear branching habit before worrying about hash internals.

Migrations like this are a good reminder to write down why a default changed. Junior devs often skip reading the design discussion, but it teaches more than the release notes.