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Hacktoberfest Hack Day São Paulo x FLUSP

Hacktoberfest 2026

Saturday October 31, 2026
9:00AM to 5:00PM UTC-03
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Centro de Competência em Software Livre (CCSL), IME-USP
Av. Prof. Luciano Gualberto, 1171
CCSL lobby, Imre Simon auditorium
São Paulo, São Paulo 05508-010
Brazil

Event Description

[pt-BR]

E se, neste Halloween, em vez de caçar fantasmas, você caçasse bugs? No dia 31 de outubro, o FLUSP — FLOSS at USP recebe a Hacktoberfest 2026 para um dia de experimentação, aprendizado e construção coletiva no CCSL, no IME-USP.

A edição deste ano da Hacktoberfest tem um novo foco: Open-Source AI. Em vez de simplesmente contar pull requests, a proposta é colocar a mão no código, explorar modelos open-weight, ferramentas de IA open source e agentes, aprender junto e construir coisas de verdade.

E não poderia haver lugar melhor para isso. O FLUSP é uma comunidade de estudantes da USP dedicada a contribuir com projetos de software livre, com uma cultura baseada em compartilhamento de conhecimento, revisão de código, mentoria e colaboração. O grupo mantém encontros semanais no CCSL, um espaço do IME dedicado justamente à promoção do software livre.

Durante o Hack Day, vamos transformar essa filosofia em prática: formar equipes, experimentar ideias, construir projetos e aprender com outras pessoas. Você não precisa ser especialista em IA nem chegar com um projeto pronto — basta trazer curiosidade, vontade de construir e, de preferência, seu laptop.

E sim: é Halloween. Então venha preparado para encontrar alguns bugs assustadores, modelos que fazem coisas inexplicáveis e, quem sabe, um ou outro merge sobrenatural.

Código aberto, ideias abertas e um sábado inteiro para construir. Nos vemos no Hack Day!

[en]

What better way to spend Halloween than hunting bugs instead of ghosts? On October 31st, FLUSP — FLOSS at USP is hosting Hacktoberfest 2026 for a full day of experimentation, learning, and collaborative building at the CCSL, at IME-USP.

This year's Hacktoberfest comes with a new focus: Open-Source AI. Instead of simply counting pull requests, the goal is to get hands-on with open-weight models, open-source AI tools, and agents — learning together, experimenting, and actually building things.

There couldn't be a better place for it. FLUSP is a community of USP students dedicated to contributing to free and open-source software, with a culture built around knowledge sharing, code review, mentoring, and collaboration. The group holds weekly meetings at the CCSL, a space at IME dedicated to fostering free and open-source software.

During the Hack Day, we'll put that philosophy into practice: form teams, explore ideas, build projects, and learn from one another. You don't need to be an AI expert or arrive with a fully formed project — bring your curiosity, your willingness to build, and, preferably, your laptop.

And yes: it's Halloween. So be ready for terrifying bugs, mysterious model behavior, and maybe even a supernatural merge.

Open code, open ideas, and a whole Saturday to build. See you at Hack Day!

Who can attend?

Locations have different requirements for who can attend. This location is open to the following:

Links & Resources

Agent Skills Explained: What They Are, What They Aren't, and How to Use Them

Overview of the Agent Skill Open Standard and SKILL.md authoring.

Open link →
A Developer's Guide to Open-Weight LLM API Integration

Guide to deploying and integrating large open-weight LLMs.

Open link →
How to Run Google's Gemma 4 Locally with Ollama

Local setup and edge execution for models under 10B parameters.

Open link →
Hermes Agent: A Practical Guide

Setting up and orchestrating workflows using open-source agent harnesses.

Open link →
Gemma 4 Resources

General hub and documentation overview.

Open link →
Gemma Quickstart

Getting started guide and rapid API setup.

Open link →
Gemma API Docs

Endpoint specifications and API references.

Open link →
Gemma Beginner Guide

Step-by-step introduction for new developers.

Open link →

Hosted by

Mateus Ramos

We are a group of graduate and undergraduate students at the University of São Paulo (USP) that aims to contribute to free software (Free/Libre/Open Source Software - FLOSS) projects.

Contact Host