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Ralphthon.

RPH-002 / 2026-03-28 / Archived

Ralphthon SF + Seoul

The connected SF + Seoul edition brought Seoul's agent handoff protocol into the San Francisco builder network while the Korean partner surface ran in parallel.

Main field film

실리콘밸리 개발자들은 더이상 코드를 쓰지 않습니다 | 랄프톤 SEOUL X SF

Watch on YouTube
Team Attention archive / Team Atn랄프톤 2026 SF x 서울, OpenAI가 함께하는 신개념 해커톤 | 팀어텐션 아카이브Related field note / Team Atn랄프톤, 랍스터가 되어야 코딩할 수 있는 해커톤 | 팀어텐션 아카이브

Core from Luma

Protocol brief

  • The SF Luma page states the core rule plainly: if you want to touch your laptop, you put on a lobster costume first.
  • While AI agents code, builders are expected to meet the people shaping what comes next.
  • The event included science-fair demos, finalist stage demos, and OpenAI-supported prizes.

Hosted by

Host line

Luma lists Goobong Jeong, Sigrid Jin, Ray Fernando, Weights & Biases, Hoyeon Lee, Jake Park, and Seongmin Han as hosts.

Goobong JeongSigrid JinRay FernandoWeights & BiasesHoyeon LeeJake ParkSeongmin Han

Run order

Schedule

  1. Check-in and team building
  2. Spec writing and agent setup
  3. Ralph begins
  4. Science Fair and finalist demos

Evidence

Proof

Application required277 builders attended (application required)OpenAI API credit prizesScience Fair demo floor
Open public event page

Luma record

Operational notes

Venue

  • 400 Alabama St, San Francisco.
  • Hosted at Weights & Biases / CoreWeave.
  • This archive entry combines the SF edition with the connected Seoul partner surface.

Prizes

  • 1st place: $10,000 in OpenAI API credits plus 6 months of ChatGPT Pro.
  • 2nd place: $5,000 in OpenAI API credits plus 6 months of ChatGPT Pro.
  • 3rd place: $3,000 in OpenAI API credits plus 6 months of ChatGPT Pro.
  • All accepted participants received $100 in OpenAI credits.

Speakers

  • Geoffrey Huntley.
  • Romain Huet.
  • Mo Tiwari.
  • Jaegyu Lee.

Judges

  • Q, Yeachan Heo, Yujong Lee, John Jeong, Chanhee Lee, CJ Na, Jay Warida.
  • Mantra Patel, Justin Shin, Sheshansh Agrawal, George Zhang, Austin Wang, Ben Kim, and Shriank K.
  • The Luma page also identifies Yeachan Heo as part of bellman.

Schedule

  • 8:30 doors, check-in, and team building.
  • 9:30 welcome, event intro, and how to run Codex plus Ralph Loop.
  • 10:00 hacking begins with spec writing and agent setup.
  • 12:30 Ralph begins; agents work autonomously and the lobster costume rule starts.
  • 15:30 laptops open for review and demo prep, followed by 16:30 science fair submissions.
  • 17:30 speaker session, 18:30 finalist demos, 19:30 awards, and networking after 20:00.

Sponsors and OSS Partners

  • Sponsors listed on Luma: OpenAI, Naver D2SF, Hanriver Partners, Kakao Ventures, Bass Ventures, Weights & Biases by CoreWeave.
  • OSS partners listed on Luma: OmX, OmO, and OmC.
  • The page describes those OSS projects as having accumulated 60K stars.