I need the exact opposite - most of my chats are throwaway chats for one-off problems as I work. I don't need them once I get past the problem, so I want them g

I need the exact opposite - most of my chats are throwaway chats for one-off problems as I work. I don't need them once I get past the problem, so I want them gone to avoid cluttering my UI and history. But not all are throwaway. There are some that provided info that is good for long-term reference. It is exceedingly tedious to do the housekeeping to delete the useless ones and keep the good ones, so I end up keeping bookmarks to the good ones and letting everything pile up. If someone would give me an extension to flag a conversation as "Yes, this is worth saving", and purge everything else... that would be a cool extension.