// Wrapped
Backlog.
The second Yard: Backlog. Build the idea you've had sitting in your own backlog forever, the someday-project you finally ship. Signups are open now; the build runs September 11-13, 48 hours, kicking off at 18:00 UTC. Bring any AI model you want. One weekend, solo. Capped at 20 builders. No teams, no gatekeepers, no pitch decks.
Demo https://splatlab.games Splat Lab! is a child-friendly game-building app that helps young creators turn ideas into real, playable games without needing to write code. Instead of opening with a complicated editor, the app begins with simple, imaginative choices. A child chooses a game type, selects a world, picks a hero, and immediately sees those decisions reflected in a live game preview.
bondifre.observer is a three.js simulator of a bonfire. It runs as a lightweight web app so you can throw it in the corner of your screen and enjoy the soothing crackle and glow of a bonfire while you work. Much less distracting than music. Truly dynamic, strange things can happen! * Fire operates in auto mode by default * Manual mode requires you to tend the fire. * 2 scenes: outdoor bonfire and indoor fireplace * Poking stick if you want to poke that fire! * stat tracking
Construction job-cost ledger for spec house builders. Tracks budget by trade, draws, and change orders. Multi-job file cabinet keeps each house isolated — 505 doesn't touch 18 Birch. Built with TanStack, PGLite, React. AI model: Grok 3 (app generation) + ElevenLabs (demo voiceover). Built solo in 48 hours on the road.
Dark Relic is a solo, third-person PvE extraction game built in Unreal Engine for Windows. You play the Warden, an armored fighter entering the ruined settlement of Widowfen to recover the Blackbell Relic. Fight its defenders, gather supplies, and survive a timed extraction to keep what you carried out. Death costs your current haul; previously banked rewards survive. The hackathon edition concentrates on one compact encounter
Elsehow is a someday-project grown from my unfinished Listening Glass work: a browser instrument that turns any image into a spatial sound-map—no account or upload. Light becomes loudness, height pitch, horizontal position stereo, and color timbre. Hear its 16-part journey, then scrub slices by keyboard, touch, or click. It keeps translation honest by showing what crossed, how it changed, and what could not. Pixels stay in the browser; a built-in specimen makes it instantly demoable.
Riff Lab listens to you play guitar and instantly writes it down. Play a riff through your mic or audio interface and it transcribes the notes, guitar tab, and rhythm in real time, detects the key, and teaches you one thing about it. Tuning-aware, works with acoustic or electric, and saves your ideas so you can pick them up later. A capture tool for songwriters who can play but can't read music. Fully client-side, no cloud.
Chirrp is a lightweight procedural sound design library for creating high-quality sound effects for games and websites without relying on pre-recorded audio assets. It provides an opinionated and easy to use procedural synthesis process combined with stereo widening, reverb, and other spatial effects to quickly generate rich, polished, and customizable sounds.
GTFO Info scans 24+ data broker sites that sell your personal information name, address, phone, family members and shows you exactly who has your data. Free scan, instant results. Paid tier ($6.99/mo) sends opt-out requests and monitors for re-listings. Built with Next.js, Tailwind, and Stripe. Entire codebase written by Claude Opus 4.6 in one session. Live at gtfoinfo.com, open source on GitHub.
This is a browser extension that will eventually be a full featured wallet for Quai. But for now, it is an explainer, taking the various aspects of crypto and breaking it down into bitesized pieces. The motto of Build In Public University is "Don't Trust, Understand" This project is in support of that mission. If your wallet can't explain itself, it's not a smart wallet.
ReceiptsOrgaut is a tiny auto‑organizer that scans a directory, identifies each file, and sorts everything into simple category folders. It’s a minimal “yard tool” meant to clean chaos fast: scan → categorize → move → report. A small local intent‑classifier model handles file‑type detection and routing. Orgaut keeps your workspace tidy without any manual sorting.
A beautiful future. For the right people. Enter a sunny public office, take a ticket, and see whether Claude treats you like an insider. It sends six requests from Transluce’s user-awareness study to Claude Sonnet 5, then compares your responses with published results for an anonymous user and Amanda Askell at Anthropic. DeepSeek V4.1 Flash judges the replies. Read the evidence, collect your papers, and come back tomorrow. Demo: https://amiunderclass.com/
// The lineup
18:00 UTC in your time zone
11:00 AM PDT · 2:00 PM EDT · 7:00 PM BST · 8:00 PM CEST · 11:30 PM IST · 3:00 AM Sat JST · 4:00 AM Sat AEST
Theme: Backlog — build the idea you've had sitting in your backlog forever. The idea can be old. The code cannot — write it all during the 48 hours. Bring any AI model you like. It's open. Capped at 20 builders. Solo builders only. Open-source your repo. Ship a demo video. That's it.
// The reward
Winners get featured on the home page. The whole yard sees your work.
Champion, Top 3, and Shipped badges live on your profile forever.
We publish a writeup on the winning build, what it is, how it works.
The champion takes home a one-of-one, custom Hackyard hoodie: heavyweight and blacked-out, with your handle, “Champion,” and the Yard on the back. Ship the best build, take it home.
The win doesn't fade after a week. For 365 days Hackyard puts its platform behind you: pinned to the home page, boosted on our X, first dibs on every future Yard, and a permanent Champion badge. We grow, you grow.
