Notes on backend systems, correctness, reliability and applied AI engineering by Samuel Hernández.https://samhernandezc.bkode.latenhttps://samhernandezc.bkode.lat/notes/deterministic-rules-changing-datahttps://samhernandezc.bkode.lat/notes/deterministic-rules-changing-dataWhy a system that computes from rules and then recommends from live data should keep those two steps apart, and how that changes persistence and testing.Mon, 05 Oct 2026 00:00:00 GMTsystem designcorrectnesstesting