Essays and notes on AI, software engineering, developer tools, systems, and the shape of modern product building.
Antonio B De Castro

Automated review bots are catching real bugs—and creating new categories of code review theater
Antonio B De Castro

Internal tools at Fortune 500s, Django shops modernizing, and Rails renaissance—htmx is everywhere now
Antonio B De Castro

Why Svelte’s bet on compiler magic continues to pay off
Antonio B De Castro

Composable error handling, dependency injection, and concurrency—without the FP jargon
Antonio B De Castro

The runtime that was ‘just benchmarks’ now has a complete toolkit and real production users
Antonio B De Castro

The utility framework that conquered the world is getting a complete engine overhaul
Antonio B De Castro

One command to download and run Llama, Mistral, or Mixtral on your laptop
Antonio B De Castro

From Zod to tRPC to Drizzle—TypeScript’s tooling has crossed a quality threshold
Antonio B De Castro

Rate limits, data retention, and model deprecation—the fine print everyone ignores
Antonio B De Castro

Retrieval-Augmented Generation bridges the gap between demos and production