I'm an Applied AI Research Engineer at Krafton AI, where I work on character simulation for inZOI and built Terminus-KIRA, a coding-agent harness that reached 74.8% on Terminal-Bench (Rank #2 globally; #1 with Opus 4.6). I finished my M.S. in AI at KAIST in 2025 (advised by Hyunjung Shim) after a B.S. in Cyber Defense at Korea University. My interests are agentic AI, social simulation, and efficient AI. Recent papers: DGQ (ICLR 2025) and TuneQDM (ECCV 2024). On the side I'm building Playground, a small open-world village whose AI NPCs remember every visitor, packaged as @ugonfor/ai-npc-world on npm.

You can reach me at hyogon.ryu (at) kaist.ac.kr.

Last updated: May 2026.