~/marcos-marx
Building durable systems.
Learning in public.
I'm Marcos — a systems-minded engineer from Brazil. I rebuild things from first principles to understand them, ship desktop apps in Rust + Tauri, and give every repo a Brazilian name. This site is the public part of the notebook.
Latest writing
Garoa, compota, papagaio — why all my repos have Brazilian namesJun 10, 2026
A naming convention that is also a small act of homesickness. And a tour of what those projects actually do.Building a TTRPG engine with an LLM that won't forget my storyMay 28, 2026
Long-term narrative coherence with a knowledge graph, Rust, and Tauri. Or — how I taught a language model to stop killing NPCs twice.Learning in public, from first principlesApr 15, 2026
Why I rebuild things that already exist, and why "what separates a top 1% engineer" is a question worth asking out loud.Things I'm building
garoa
Open source community management. Like the São Paulo drizzle: it does not storm, it accumulates.
Data · Communitypapagaio
Offline speech-to-text for Brazilian Portuguese, powered by Parakeet. The parrot listens, the cloud does not.
Rust · Tauri · Local AIttrpg engine
An LLM game master with a knowledge graph for memory, so the blacksmith stays dead.
Rust · Tauri · LLM · Graphstomatte
A macOS Pomodoro timer with one extra "t". It judges me, gently.
macOS · Tauri