Cypher can now work from my full Garmin and Fitbit history, plus more than 3,000 archived ChatGPT conversations.

I did not dump everything into memory and hope for the best.

Health records and conversation history are separate. Sources are preserved. Duplicate protection is built in. Real calculations were tested. A Fitbit unit-conversion error got caught. And old assistant replies cannot quietly become facts about me.

That is what making an assistant trustworthy actually looks like.