One of the biggest selling points for Elephas, your competitor, to me, was the "Brains" feature. It allows you to add files, URLs, and even Notion documents and more as "background knowledge" to an Assistant.

In my use case, I added some legal texts and statutes to a specific Assistant ("Brain" as they're called in Elephas), and whenever I chat with it, it remembers this background information (URLs must be cached, of course). It's more or less an advanced instruction system for Assistants.

This feature would be a great addition, in my opinion.