01 · The modelThree heads, one card.
A brand studio for athletes, fantasy-style card leagues for fans, and a card market where values move on real performance. Fans first; the DFS model proved the beachhead, and the matchup is where fans spend the night.
The card is the unit across all three. The athlete's page issues it, the league plays it, the market prices it.
02 · The feedPlays in, cards out.
Plays arrive from Sportradar, land in Redis, and fan out over Ably to every open arena. A reducer turns each play into fantasy points and a value move. The arena is a pure function of the event log, so a reconnect replays the log and lands in the same state.
Points: 2PT 2, 3PT 3, FT 1, REB 1.2, AST 1.5, STL 3, BLK 3, TO minus 1. Win probability is the score gap against the time left, nothing cleverer.
03 · LearnedPick the one screen that is the product and build that first.
Everything else is a form. The schema merged first, then the arena spec. The arena above is that spec running on a script; the real feed comes next, and nothing in the arena changes when it does.
The drawing below was the plate until tonight.
Punch list · 3 open- Wire the arena to the real feed
- Fan screens
- Stats feed: Sportradar to Redis