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