Build-alongs, start to finish

5 parts

A five-part build-along: a point-of-sale system that keeps selling when the connection drops, reconciles stock across tills without conflicts, and is honest about which payments can be verified offline.

1. 1. Offline-first POS, part 1: why the network cannot be on the critical path
2. 2. Offline-first POS, part 2: never store a stock level
3. 3. Offline-first POS, part 3: selling with the router unplugged
4. 4. Offline-first POS, part 4: idempotent sync and the last-item problem
5. + 1 more