​Ralphthon @SF

​If you want to touch your laptop, you put on a lobster costume first. 🦞

​While your AI agent codes, you meet the builders who are shaping what comes next.

​This isn't just a hackathon. It's your entry point into a top-tier network of agent-native engineers

​While your agent works, you're in the room with speakers, builders, and conversations you won't find anywhere else.

​Prizes

• ​🥇 1st Place — $10,000 in API credits + 6 months of ChatGPT Pro

• ​🥈 2nd Place — $5,000 in API credits + 6 months of ChatGPT Pro

• ​🥉 3rd Place — $3,000 in API credits + 6 months of ChatGPT Pro

​All accepted participants receive $100 in OpenAI API credits for the event.

​⚠️ In-person only (San Francisco) · Application required · Limited to ~50 builders · Teams of 1–4

​Schedule (Tentative):

• ​9:00 AM – Doors open · Check-in

• ​10:00 AM – Hacking begins · Spec writing & agent setup

• ​12:00 PM – Lightning pitches · Each team presents their idea in 3 minutes

• ​1:00 PM – Ralph begins. Agents run autonomously. If you want to touch your laptop, you put on a lobster costume first. 🦞

• ​1:00 – 5:00 PM – While your agent works, you connect

• ​5:00 PM – Laptops open · Review what your agent built

• ​6:00 PM – Live demos & judging

• ​8:00 PM – Awards

• ​~9:00 PM – Networking

​Judges

• ​Q — Maintainer of oh-my-opencode(39.2K ⭐)

• ​Yeachan Heo (bellman) — Maintainer of oh-my-claude-code(9.4K ⭐) & oh-my-codex

​More judges to be announced.

​Sponsored by

​OpenAI

​

​ZVC: Venue offered

​Z Venture Capital (ZVC) backs the next generation of builders shaping the future of the internet. As the VC arm of LY Corporation (LINE & Yahoo Japan), we partner early with founders across AI, fintech, commerce, media and consumer tech across Japan, US, and Asia.

​Previous in Seoul

​Ralphthon originated in Seoul (Feb 28 – Mar 1, 2026) as a 24-hour overnight format where builders set up agents, went to sleep, and woke up to what shipped.

​Notable open-source contributions from Seoul:

• ​oh-my-claude-code 9K ⭐ — 2nd place winner's harness

• ​Ouroboros 1k ⭐ — 1st place winner's harness

​About

​Organized by Team Attention. We run creative hackathons, clubs, and open-source projects at the intersection of community and AI-native workflows.

​Previous events: Skillthon (Anthropic-sponsored) → Ralphthon Seoul (OpenAI + Kakao Ventures) → Ralphthon SF

​All attendees must submit an application and be approved to attend.

​Contact

​GB Jeong linkedin.com/in/gb-jeong