Setting osmos's name, tone and rules
Personalising how it speaks and standing instructions it should follow.
In Core → Profile you can give your assistant a name and choose a tone. Both change how it writes, not what it can do.
For standing instructions, just tell it in chat: "Always use 24-hour times", "Never book anything without asking", "Call me Sam". Rules you state clearly are remembered and applied. If one stops being followed, restate it; that's the reliable fix.