Most browser extensions that call an LLM route your requests through the developer's server. That means your queries — every term you look up, every concept you're half-embarrassed not to know — pass through infrastructure you don't control, get logged at some layer, and fund somebody's inference costs until the startup pivots or shuts down. rabbitholes doesn't work that way. When you highlight a word, the request goes from your browser directly to api.anthropic.com . No intermediary. No proxy. No backend I'm running. This wasn't a late-stage privacy checkbox. It was the first architectural decision, because it's the only design that's actually private. An intermediary server that promises not to log is still a server that can log. Direct-to-API means the topology itself is the guarantee. The implementation consequences are real. Your Anthropic API key lives in chrome.storage.sync , encrypted by Chrome, never transmitted anywhere except the Anthropic endpoint.…