Notes
Technical
essays.
Short pieces expanding on decisions from the cases — tool calling, prompt caching, model routing, multi-tenancy. For people who read code.
- 02May 20, 2026
6 versions in 6 years: lessons from keeping a product alive
Started in Excel in 2020. Went through VBA, MS Access, plain React, Next.js, and today Next.js + Supabase. What I learned between each jump about building software that survives in production in a real operation.
ProdutoOperações· ~6 minRead - 01Apr 22, 2026
Per-feature model routing: 70% savings without losing quality
General chat doesn't need the most expensive model; strategic analysis does. Per-feature routing with workspace override saves ~70% without sacrificing the critical decision. Measured in the AgroTrack pilot.
AICusto· ~5 minRead