Day 1: Set up dev environment (Postgres, Node 22, npm install)
Day 1: Read /docs/architecture and /docs/how-it-works
Day 2: Pair with engineering buddy on first PR
Day 3: Open first PR (anything trivial, get the rhythm)
Day 4: 1:1 with manager — what's working, what's not
Day 5: Week-1 retro doc shared with team