There are many folks working on this, I think at the end of the day the long term memory is an application level concern. The definition of what information to capture is largely dependent on use case.
Shameless plug for my project, which focuses on reminders and personal memory: elroy.bot
Shameless plug for my project, which focuses on reminders and personal memory: elroy.bot
But other projects include Letta, mem0, and Zep