Club badminton
A drop-in badminton club in Snoqualmie, WA ran Mondays and Thursdays on a whiteboard and illegible handwriting. This replaced it: check in, record the game, watch the scoreboard move.
What it is
Every Monday and Thursday, a drop-in club in Snoqualmie turns up with rackets and a whiteboard. Names get scrawled at the top, wins get tallied in the margin, and by the last game of the night nobody can read the handwriting or agree on who beat whom.
Sno Baddy puts the same night on a phone. An admin starts the session, players tap Check In, and the app knows who is on court. Tap Generate Matches and it proposes the next round from wait time, skill and who has already played whom — the part a whiteboard cannot do.
Session list
The home screen is the season. Tonight sits at the top; every past Monday and Thursday sits under it, finalized and still readable months later. An admin starts a new one in a tap.
Check-in
Players tap Check In on their own phone; an admin can check anyone in or out from the card grid. Walk-ins get added by hand, with no account, and count like everyone else.
Scores
Pick two teams and a number, or flip Win/Loss Only for a night nobody wants to type. Generate Matches proposes the next batch: longest waiters first, no back-to-back games, teams split for even skill.
End of night
Finalizing closes the session and hands out awards: The Slayer, The Unstoppable, The Untouchable, The Point Collector. Under them sits the night’s full table — matches, wins, losses, points, win rate.
Profiles
Tap any name for wins and losses per session as a bar chart, plus every match you played — partner, opponents, score. Each profile also carries a short poem about the player, written by Claude.
How it works
Four things happen every club night, in this order, and the app only ever asks for the next one.
01
An admin opens tonight’s date and taps Start. The session goes live for everyone who has the app open.
02
Players tap Check In from their own phone; walk-ins get added by hand. Who’s Here fills up with skill dots and arrival times.
03
Generate Matches proposes the next fair batch. After a game, someone saves the score and the scoreboard updates for everyone.
04
The admin closes the session. Awards get handed out and the night’s numbers roll into the season leaderboard.
Features
Tap in when you arrive, tap out when you leave. Who’s Here updates for everyone with the app open.
Proposes balanced doubles from wait time, skill level, and who has already played whom tonight.
Full mode records the actual points. Win/Loss mode records only who won, for nights nobody wants to type.
Wins, losses, points and win rate for tonight, sortable by any column, with the full match log underneath.
Cumulative record for the whole season, plus two season awards for volume played and best win rate.
Closing a night hands out The Slayer, The Unstoppable, The Point Collector and a few more.
Win rate per session as a bar chart, plus every match with partner, opponent and score.
Claude writes a short poem for each profile and rewrites it when that player’s match count changes.
Start, close or reopen a session, edit or delete a match, and set anyone’s skill level from one to five.
Built with
Names, skill levels and scores live in a Supabase Postgres database behind row-level security. Sign-in is Google OAuth or email and password. The poems cost a few cents of Anthropic credit. It is, objectively, more engineering than a whiteboard requires. The whiteboard cost $4.99.
FAQ
Yes. No ads, no subscription, nothing to buy. The Anthropic API credit the player poems burn through is measured in cents, and it is mine.
To check in or record a score, yes — Google sign-in or an email and password, then about ten seconds to pick a skill level. Walk-ins need nothing: an admin adds them by hand.
A Supabase Postgres database with row-level security, served from Vercel. It holds display names, skill levels and match scores. Vercel Analytics and Speed Insights collect page-level traffic data.
That is the only place it really gets used — the whole thing is built mobile-first for people standing next to a court. It is a website, not an App Store download.
Not as it stands. Admin emails are a hard-coded whitelist and it assumes one club and one season. The source is on GitHub if you want to fork it and change that.