Twenty yes/no questions, no text answers, one hackathon project out.
You paste a hackathon link (or its description, or nothing) and answer twenty yes/no questions about yourself. Then it names one project: a name and one sentence. No list of options and no explanation. If you don't like it, Ask 3 more keeps your answers and asks three more questions. Start from 0 begins again with different questions.
Made for Build With AI: Basics on Devpost. The hackathon's skill pack starts by asking what you want to build, and assumes you already know. This is the step before that.
| Question | Later question | On a phone |
|---|---|---|
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Needs Node 22 or newer and an Anthropic API key.
npm install
cp .env.example .env # put your key in .env
npm start # http://localhost:3000npm run mock runs without a key. It uses a fixed list of sample questions (not adaptive) and is only for working on the interface.
Keys: Y and N answer, A asks 3 more, 0 starts from 0, Enter begins.
The page is plain HTML, CSS and JavaScript, no framework and no build step. A small Node server (server.js) keeps the API key off the browser, fetches the hackathon page, and calls Claude. The server keeps nothing between requests; the page sends the whole run every time.
lib/hackathon.jsturns the link into plain text. Claude reduces that to a short brief: theme, rules, judging, how much time there is.lib/oracle.jsholds the prompts. The questions go in three phases: who you are (1-8), what kind of thing (9-15), and its character (16-20). Each run draws 8 random life areas for the first phase, so two runs in a row start differently.public/app.jsasks for the next question for both answers while you are still reading the current one, so most taps get the next question in under a second.
The model is claude-sonnet-5-5, effort low for questions and high for the verdict, with JSON output. Each answer is its own content block with a cache marker on the last one, so a question costs about $0.001 and a full run about $0.05. The server prints time, tokens and cost for every call.
Built with the Devpost Learn skill pack (.agents/skills/). The planning documents it produced are in devpost/: scope, PRD, spec and the build checklist. The checklist also records where the build left the pack's normal order.
MIT