Founder Compass: Designing a Stateless AI Profiler with Svelte 5 and Cloudflare Workers

I wanted to build an AI tool that respects user privacy by design — no accounts, no database, no stored profiles. I work at the intersection of finance and software in the DACH ecosystem, which shaped many of the architectural decisions described here. This article walks through how Founder Compass works from an engineering perspective: architecture, streaming strategy, and prompt design. TL;DR 12-question profiler that maps founder constraints (risk tolerance, runway comfort, business model preference) to a structured AI report Single Cloudflare Worker, no database: rate limiting runs on the Cache API with a SHA-256-hashed IP key and a 604,800-second TTL SSE streaming via o4-mini — report starts rendering in the browser within ~2 seconds of submission Quiz state and generated report persist exclusively in localStorage — the only data that leaves the browser is the 12 anonymized answers, transmitted once on explicit user consent The Real Reason Most Founders Struggle Most founders do n