Your AI config shouldn't sit behind a paywall.

The AI Profile Builder is a side project by the Alunah agency in Braunschweig, Germany. We build websites and SEO systems, and in that work we kept noticing the same thing: almost nobody has a precise, living model of how they want their AI assistants to behave — and everyone who does get dramatically better results.

So we built this: an uncompromisingly free, client-side settings panel for your AI. No quiz. No personality scores. Just a configurator that compiles your preferences into a CLAUDE.md you can drop into Claude Code, paste into ChatGPT Custom Instructions, or feed any other LLM that accepts context.

No account. No database. No analytics. No email gate. Every setting stays in your browser. Export is a plain Markdown file you own.

We took inspiration from published CLAUDE.md files, Cursor rules, Anthropic's prompt-engineering docs, and the wider prompt-engineering community. Where we noticed a gap — options that stack instead of forcing a single pick, concrete behavioural examples per rule — we filled it.

There is no pro version. No upsell. If this saves you time, tell someone. If it doesn't, tell us why. That's enough.