Small tools, games, and experiments I made
A Baekjoon-style judge in your browser
8,327 visitors last week
AI picks and summarizes news on your topic
612 visitors last week
Specimen of this site's typeface
68 visitors last week
How much compute am I using?
61 visitors last week
How many tokens did I use?
41 visitors last week
arXiv papers with margin notes, figure guides, and a critical review
33 visitors last week
Live quota across my AI coding accounts
20 visitors last week
Spin a toy revolver until one name is left
11 visitors last week
Sleep, readiness, and steps, by day
10 visitors last week
Who visits, from where, and how fast it loads
8 visitors last week
What I'm listening to
Pass one phone. Find the liar
Is the name taken? Plus an honest AI score
7 visitors last week
Climb from Greater Peon to Greater Dalmuti
6 visitors last week
Sunghyun's Apple Wallet business card
5 visitors last week
Curated reading paths
4 visitors last week
Get interviewed by a live voice agent
3 visitors last week
Flip a 3D coin
Play Sunghyun, AI, or a friend
2 visitors last week
Mafia on your phones, hosted by an AI
Standard Korean into regional dialects
1 visitor last week
Spin the bottle
Blackjack with friends, AI optional
Roll 3D dice
Think out loud with a duck that asks questions
March your flag past an army of hidden ranks