The Multiplayer Coding Hackathon

Most hackathons are a room full of people, each one alone with their own AI agent. This one is built the other way round. Your whole team works in a single shared Coshell drive, steering live AI agent sessions together. Every prompt has a name on it.

Teams of 2 to 5 only. In person in San Francisco. One day, one clock, one room of 150.

Tracks and prizes from assistant-ui and Chargebee, judged by the sponsors themselves: $500 cash from assistant-ui for the best multiplayer system, and $1,000 cash plus free Chargebee billing up to $2M in revenue for the team most ready to charge. Freestyle gives each winner $10,000 in credits plus 6 months of Freestyle Pro.

Details, schedule, and house rules: coshell.ai/hack

About the host and sponsors

About Coshell: Coshell is a multiplayer cloud terminal for engineering teams working with AI coding agents. Several people prompt the same live agent session inside one shared drive, with the code, a terminal, and a browser preview of the running app. More than 70 models. https://coshell.ai

About assistant-ui: assistant-ui is the React library behind production AI chat interfaces: threads, streaming replies, tool-call UIs, and attachments. They are building a multiplayer harness, and they want teams building on it early. https://assistant-ui.com

About Chargebee: Chargebee helps AI-native, SaaS, and consumer subscription businesses scale with billing and monetization infrastructure built for speed, flexibility, and rapid iteration. https://www.chargebee.com/

About Freestyle: Freestyle gives AI agents real Linux VMs, built for code you didn't write. Teams can run their shared Coshell drive on a Freestyle VM instead of a laptop, with $500 in credits redeemed on the day. Each winner also gets $10,000 in Freestyle credits plus 6 months of Freestyle Pro. https://freestyle.sh

About Wefunder: Wefunder lets anyone invest in the startups they believe in, not just venture funds. https://wefunder.com