I would like to design a…

I would like to design a reliable profile service for nostr:

- profile should be stored in a safe location under user control
- profile should have versions so that you can go back in needed
- profile should be able to sync to all devices, apps, relays
- profile should be extensible to add more information
- profile should be able to add have private, and shared items

These 5 features would greatly improve my social media experience