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The Multiplayer Coding Hackathon

MCCoshell
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when3 Oct 2026
whereSan Francisco
prizeTBA
priceFree
formatIn-Person
organiserCoshell

about this event

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 more, judged by the sponsors themselves. The grand prize, Best Built Together, comes with a fast-tracked interview for possible VC investment. Free. 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 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. https://freestyle.sh

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

tracks

assistant-ui Track

Track from assistant-ui, judged by the sponsors themselves. assistant-ui is the React library behind production AI chat interfaces: threads, streaming replies, tool-call UIs, and attachments.

Sponsored Tracks

Additional tracks and prizes from assistant-ui and more, judged by the sponsors themselves.

when

October 3, 202609:00–18:00 PDT

The Multiplayer Coding Hackathon

One-day, in-person AI Hackathon; teams of 2 to 5 work together in a single shared Coshell drive and steer live AI agent sessions. Details, schedule, and house rules: coshell.ai/hack

◍ TBA

tickets

Ticket types, prices and availability for The Multiplayer Coding Hackathon
ticketspriceFeeStatusdescription
General AdmissionFreeTBAAvailableFree entry to the one-day, in-person AI Hackathon in San Francisco.

prizes

Prize places and values for The Multiplayer Coding Hackathon
#PRIZEprice
Grand PrizeBest Built Together — comes with a fast-tracked interview for possible VC investmentTBA
The Multiplayer Coding Hackathon3 Oct 2026 · San Francisco · TBA
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