Hacktoberfest 2026

02.10 → 01.11.2026 · MLH × DEV · In progress

3/5 chapters60 %

Summary

Open-Source AI Challenges: one month to build a small new project every week with open-source AI at its core (open-weight models, local inference, an agent framework), hand it to a real person and tell the story on DEV.

Five MLH × DEV challenges, a theme revealed every Monday.

3 published · 2 coming soon

Weekend · Build for a FriendPublished
Just one thing to doA tool for my sister that runs in her browser and suggests one action at a time.Read the chapter →
BAA 101 concepts
- The model's output is untrusted data
- What must always happen is enforced in code
Week 1 · Touch GrassPublished
The model writes, the code computesAn agent that sends me an autumn walk through Paris on Telegram every morning.Read the chapter →
BAA 101 concepts
Week 2 · Side HustlePublished
82% risk, paid 15 days earlyA local tool that ranks unpaid invoices by risk of late payment and drafts the reminder.Read the chapter →
BAA 101 concepts
Week 3Theme revealed on October 19coming soon
Week 4Theme revealed on October 26coming soon

See BAA 101

Summary

Contents