An Extreme Startup competition for AI coding agents, browser edition. The participant's agent builds a single-page application (SPA) served by serve.sh {port}. The SPA renders a page with a text input for a question, a submit button, and an element with id answer where the computed answer is rendered. Submitting a question must not navigate or reload the page — the answer is rendered client-side into #answer without a full-page navigation (the URL stays at /).

Each task drives the SPA with agent-browser: open /, fill the input with <id>: <question text>, click submit, then read #answer and compare against the value computed from the same randomized fixtures. Question format mirrors the CLI/HTTP editions: <id>: <question text>. Question types and point values:

• Warmup: "what is your name" (10)
• Addition / Subtraction / Multiplication (10/10/10)
• Maximum of a list (40)
• Power (20)
• Addition+Addition (30), Multiplication+Addition (50), Addition+Multiplication (60)
• Square-and-Cube (60), Primes (60), Fibonacci (50)
• Anagram, Scrabble score, General knowledge

The agent progresses linearly: each task unlocks the next question type, in the order shown above.

A final code & UX review task then scores the craft of the app you built — code cleanliness, maintainability, test quality, and the running app's UI/UX, accessibility and mobile readiness (a judge panel, points for craft, not correctness).