Small tools, games, and experiments I made.
A Baekjoon-style judge right in your browser.
355 visitors last week
Pick a topic and AI fetches, scores, and summarizes the stories worth reading.
222 visitors last week
A type specimen for the family this whole site is set in.
100 visitors last week
Live quota headroom across my pooled Claude Code, Codex, Grok, and OpenCode Go accounts.
80 visitors last week
How many tokens did I use?
76 visitors last week
Sleep, readiness, and steps from my health devices, one value per day.
36 visitors last week
Reading agents unroll an arXiv paper into margin notes, figure guides, and an adversarial review.
29 visitors last week
A little record shop of what I’m listening to.
19 visitors last week
Create Sunghyun's Apple Wallet business card with where and when we met.
13 visitors last week
Type a name and see what's taken, with an honest AI vibe score.
10 visitors last week
Party Mafia, each on their own phone, hosted live by an AI game lead.
7 visitors last week
Turn standard Korean into its regional dialects, side by side.
6 visitors last week
Curated reading paths through the digital garden.
Play one quick game against Sunghyun.
Pass one phone around: everyone gets the word but the liar. Vote them out.
Roll a handful of 3D dice and read the sum.
5 visitors last week
Spin the bottle to pick someone from the circle.
A party table against the dealer, with AI dealt in if you like.
Upload your materials and get interviewed by a live voice agent.
4 visitors last week
Flip a 3D coin when you just need heads or tails.
Think out loud with a duck that listens and asks the right questions.
March your flag past an army of hidden ranks.
3 visitors last week
Climb from Greater Peon to Greater Dalmuti, one unfair hand at a time.
Spin the toy revolver until one name is left.
2 visitors last week
cho.sh