RPH-001 / 2026-02-28 / Archived

Ralphthon Seoul

The original overnight Ralphthon with Team Attention, Kakao Ventures, and OpenAI support: builders set up autonomous agents, handed off laptops, slept, and opened the results in the morning.

Core from Luma

Protocol brief

Agentic Engineering practitioners gathered for a 1-night, 2-day hackathon supported by Kakao Ventures and OpenAI.
Participants could use Codex, Claude Code, Opencode, GLM, and other coding agents.
The goal was not manual coding speed; the event measured how well builders designed autonomous loops.

Hosted by

Host line

Luma lists Goobong Jeong, Hoyeon Lee, 김창회, and Jake Park as hosts for the first Seoul edition.

Goobong JeongHoyeon Lee김창회Jake Park

Run order

Schedule

Setup and hands-on session
Laptop handoff
Overnight autonomous run
Morning demos and awards

Evidence

Proof

43 applicant teams9 teams, 13 builders501,955 LOC543 commits

Open public event page

Partners

Kakao Ventures joined as the first partner and judged business impact.
OpenAI supported the event with Codex, API credits, and ChatGPT Pro prizes.
The Luma page gives special thanks to Seowoo Han and Gabriel for OpenAI support.

Evaluation

How effectively the team used coding agents.
How well the team used current AI-agent trends.
Business impact judged with Kakao Ventures.

Application

Applicants were asked to share their .claude setup, including Ralph-specific configuration.
The application deadline was set for February 20, 2026, 23:59.
The event was designed for solo or duo teams.

Venue and Time

February 28 to March 1, 2026.
Seongbuk Airbnb in Seoul.
Capacity was listed as 12 people, with Saturday 16:00 check-in and Sunday 11:00 checkout.

Participant Benefits

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.