Ping-2 is the real second-brain clone I run today. In the Euston SecondSelf thesis it grows into the Ping-System below: three negotiating AI cognitive cores that let the station reconfigure itself, learned rather than programmed.
Ping-02 carries my bias; Ping-Zero carries objective operational fact with no personal data; Ping-City carries collective urban behaviour. They observe, then negotiate. Tap a core to read what each one holds.