Built for NYC · NYPL × Major League Hacking · Stavros Niarchos Foundation Library
Verified street cleanups → civic pride you can flex → real rewards from real storefronts.
Live now: builtfornyc-hackathon.vercel.app
The problem, in the city's own numbers
The flip
The loop, running live



How the system works — 30 seconds
The AI (and why to trust it)
Economic mobility · inclusion
§16-118 makes every storefront liable for its sidewalk (+18″ of street); snow gets 4 hours (§16-123). Two tickets a year costs $350 — a $20 weekly gig keeps you compliant and pays a neighbor. Scrap, our multilingual voice concierge, does the whole flow by conversation: “Find me someone to shovel snow — I’ll give 70%-off coupons.” English · Español · 中文 · Русский · 한국어 by voice; 7 languages in the UI (the Local Law 30 set).


NYC Open Data is the game engine
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Every ⚡ on the map is a real, currently-open sanitation complaint. Clean that exact spot → the Sentinel verifies → +100 XP and the bounty clears.
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The city’s own street-cleanliness ratings (76% Bronx CD5 ↔ 99.8% Queens CD11) set 2× XP in the dirtiest districts and size every Trash Monster.
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All 20,413 public baskets mapped — the “where do I dump this?” layer that closes the loop legally and practically.
Snapshots ship in-repo with provenance; live aggregate queries power the impact charts. Every integration gotcha we hit is documented for the next builder.
Impact math · community first
Open source · zero-key reproducible · github.com/roshaninfordham/builtfornyc-hackathon
↑↓ / space to navigate · works great full-screen