Defense-in-Depth in a Tiny Supabase App: 5 Patterns I Baked Into Altair Before Open-Sourcing It

This story was originally published on HackerNoon at: https://hackernoon.com/defense-in-depth-in-a-tiny-supabase-app-5-patterns-i-baked-into-altair-before-open-sourcing-it. Before I flipped my Supabase PSA tool public, I had to convince myself a fork couldn't ship a security hole. Here are the five patterns that made me trust it. Check more stories related to cybersecurity at: https://hackernoon.com/c/cybersecurity. You can also check exclusive content about #row-level-security, #jwt-authentication, #typescript-security, #authorization-architecture, #ci-enforcement, #defense-in-depth, #auth-middleware, #supabase, and more. This story was written by: @drh. Learn more about this writer by checking @drh's about page, and for more stories, please visit hackernoon.com. I open-sourced a Supabase PSA tool last week. To trust the click, I layered five auth patterns — middleware JWT check, withAuth wrappers, role-scoped column whitelists, CI-enforced architecture, and RLS — so any single layer failing wouldn't matter. Plus the one mistake I almost shipped: a service-role key in client code.