The concept: 22 levels grouped into 4 learning paths (EU consumer rights, US consumer rights, workplace rights, platform & digital rights). Each one is a corporate AI system that wrongly denied you something (flight refund, visa, medical procedure, gym cancellation). You argue back using real consumer protection laws. The AI's "confidence" drops as you find the right legal arguments. Win when it hits zero.

Tech stack:

* Vanilla JS + HTML/CSS, no framework - kept it intentionally lean
* Node.js + Express backend
* Claude Haiku as the AI engine - each bot has a system prompt with a resistance scoring system baked in. The model returns JSON with a message and a resistance value, which drives the game mechanics
* Cloudflare Turnstile for abuse prevention (one solve per session, not per message)
* Deployed on Railway

Also added accounts with progress tracking across devices, a global leaderboard (registered players only), and a coach mode that gives hints without repeating itself across turns.

The interesting part is the prompt design. Each bot has a personality, a resistance score (0-100), and specific legal arguments that reduce it by defined amounts - Claude returns structured JSON on every turn. Biggest headache was Claude breaking character on sensitive scenarios (medical denials, disability cases) to announce it's made by Anthropic. Fixed it by framing the whole thing as an educational tool in the prompt.

Happy to answer questions about the prompt engineering or architecture. Would love any feedback on the UX too.

Link: [fixai.dev](http://fixai.dev)

I built a browser game where you argue with corporate AI bots using real consumer laws [Fix AI]