Columnist

Matheus Puppe

Software engineer & founder of Gestão Bem

I build software products end to end — from the Amarra-cais framework to Purple Stock and Hora Solar — and write about systems, AI and what I learn running them in production.

github.com/puppe1990

Essays

Security & Cryptography 7 min

Capturing real browser traffic to feed an agent: the Network Listener extension

An agent guesses less when it reads what the page already told the API. How capture, scope, evidence-backed findings and replay fit together in an MV3 extension with SQLite.

Matheus Puppe

Systems Engineering 8 min

Translating EPUBs with LLMs: a resilient queue, per-chapter retry and cheap models

A deploy lands mid-translation, the model drops a tag and the bill grows. Running a book translator taught me how to design the queue, the cancellation and the cost per chapter.

Matheus Puppe

About the journal