Dynasty Draft War Room

The problem

A dynasty startup draft is a two-hour information problem. Rankings live in five browser tabs, none of them tuned to the league's scoring — superflex, tight-end premium, six-point passing touchdowns — and every pick that comes in invalidates the plan. I wanted one screen: who's gone, who's on the clock, and who the board says I should want next.

The build

The app connects to Sleeper's public API — find the league by username, discover the draft, then poll picks every eight seconds. Drafted players fall off the board in real time, with an on-the-clock countdown and turn tracking.

The rankings are the interesting part: a consensus synthesized from KeepTradeCut, FantasyPros, Dynasty Nerds, and the Flock network, then reweighted for the league's actual format — quarterbacks rise for superflex, tight ends get their premium, and the yardage bonuses are priced in. In-app overrides let me pin my own calls on top of the defaults, and a roster view flags which lineup slots I still need to fill.

The whole thing ships as a single self-contained index.html — React 18 bundled with esbuild, about 220KB, no build step, deployable to any static host. One optional Netlify Function syncs board state across devices through Netlify Blobs, with a local-storage fallback when it's unreachable.

Why it's on this site

Because it's the other end of the spectrum from the trading system. Ausi-Trader is 148,000 lines of validated infrastructure; this is a tool that went from "it would be nice if" to used in a live draft inside a Claude session. Knowing which of those two things a problem deserves — and being able to ship either — is most of the job.