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

Serverless Postgres with branching, edge functions, and generous free tiers
Antonio B De Castro

A practical guide to integrating LLMs without losing your mind
Antonio B De Castro

The first ‘AI software engineer’ demo showed the future—and the enormous gap between demos and reality
Antonio B De Castro

RAG goes mainstream, open-source LLMs close the gap, and the framework wars get interesting
Antonio B De Castro

The JavaScript ecosystem is being rewritten in Rust, one tool at a time
Antonio B De Castro

A look back at the most disruptive year in software since the smartphone era
Antonio B De Castro

Why solving pointless puzzles makes you a measurably better production engineer
Antonio B De Castro

Angular, Solid, Preact, Vue, and Qwik all ship signals—React is the holdout
Antonio B De Castro

IDE-integrated AI versus browser-based AI—a head-to-head comparison across real tasks
Antonio B De Castro

Podman, containerd, and the unbundling of the container ecosystem