The homepage should point to the current conversation.
It does not need to explain everything.
That is too much pressure for one page.
The better job is orientation.
Here is the person.
Here is the live thread.
Here are the deeper routes if you want them.
The homepage should make it easy to decide:
Do I want to keep reading?
Do I want to have a conversation?
Do I want my agent to understand this better?
The archive can hold depth.
The homepage should open the door.