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Ralphthon.

RPH-003 / 2026-03-29 / Archived

Ralphthon Seoul #2

A connected Seoul edition run alongside Ralphthon SF, with a live bridge between the two cities.

Team Attention archive

랄프톤 2026 SF x 서울, OpenAI가 함께하는 신개념 해커톤 | 팀어텐션 아카이브

Watch on YouTube

Core from Luma

Protocol brief

  • AI agents code while hackers build community.
  • Seoul and San Francisco ran independently but connected live for one hour: Seoul 9am matched SF 5pm.
  • The first Seoul edition generated 501,955 lines of code and 543 commits, setting the benchmark for Seoul #2.

Hosted by

Host line

Luma lists Goobong Jeong, 하도윤, min sing, 서인근, and Jeffrey Kim as hosts.

Goobong Jeong하도윤min sing서인근Jeffrey Kim

Run order

Schedule

  1. Local opening
  2. Ralph handoff
  3. Seoul-SF live bridge
  4. Demo and awards

Evidence

Proof

Seoul-SF bridgePrevious participants became hostsSame handoff ruleTop two Seoul #1 teams reached 100% autonomy
Open public event page

Luma record

Operational notes

Venue

  • NAVER D2SF Gangnam.
  • 18F, Samsung Fire & Marine Insurance Seocho Tower, 14 Seocho-daero 74-gil, Seocho-gu, Seoul.
  • The event ran as the Seoul side of the same SF + Seoul Ralphthon weekend.

SF-Seoul Bridge

  • SF ran on March 28 and Seoul ran on March 29.
  • Seoul 9am was aligned with San Francisco 5pm.
  • The two cities were independent events but connected through a live cross-city speaker hour.

Speakers

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

Rules and Prizes

  • The lobster rule from the first Seoul edition returned: touching the laptop required wearing the costume.
  • The agent was expected to keep working while the laptop was closed or while builders stepped away.
  • 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.

Judges

  • 이태양, Bass Ventures 대표.
  • 이상희, Sendbird Korea 대표.
  • 한기용.
  • 이재규, ZEP Tech Lead.

Sponsors and OSS Partners

  • Sponsors listed on Luma: OpenAI, Naver D2SF, Hanriver Partners, Kakao Ventures, and Bass Ventures.
  • OSS partners listed on Luma: OmX, OmO, and OmC.
  • The page says the first Seoul edition's top two teams reached 100% autonomous agent execution.