I write software, and sometimes I write about it.
I'm a co-founder and the founding engineer of Ranqia, where we build the infrastructure that lets brands shape what LLMs say about them. I study Computer Science at Insper, and I collaborate with LABORA at FGV EMAp, a lab for mathematical modeling in epidemiology. I got here from a small town in Alagoas through math olympiads, and the whole road is on my site.
- whatsapp-mcp. Give your AI agents your WhatsApp. An MCP server that reads, searches and sends your messages, running on your own Cloudflare account.
- pi-harness. The extensions I run pi with: permissions, providers and more, each installable on its own.
- repositron. A typed, generic repository base for SQLAlchemy 2.0. Full CRUD, zero per-table boilerplate.
- regbr2cf. A CLI to move registro.br domains to Cloudflare nameservers in bulk.
- dms-music-theme. A DankMaterialShell plugin that tints the system theme to match the album art of what's playing.
- neural-network. A neural network written from scratch, with the math documented.
- Sim, outro harness de coding agent, on why "giving an LLM tools" was always a regex over text, and the harness I built on top of pi.
- Leaving Next.js for a SPA and a Worker, on moving an app to React Router and Cloudflare Workers.
More in the log, and how my machine is set up in the wiki.
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