Kyren — Writing https://kyren.app/blog Notes on RAG, evaluation, Postgres, and shipping small products well. By Masato. en Fri, 12 Jun 2026 00:00:00 GMT A public demo without breaking per-user RLS https://kyren.app/blog/2026-06-12-public-demo-without-breaking-rls https://kyren.app/blog/2026-06-12-public-demo-without-breaking-rls Layering an anonymous demo route on top of strict per-user row-level security in Postgres — using additive permissive policies instead of a magic sentinel UUID. Trade-offs documented. Fri, 12 Jun 2026 00:00:00 GMT