Being able to branch after some point of conversation

Often, during my discussion sessions with the AI, I reach a juncture where we solidify a particular thought or logic. Once this foundational concept is established, I find it necessary to explore further while retaining the essence of the original idea.

Currently, I request the AI to summarize the most recent progress. I then initiate new sessions, paste the summary, and proceed from there.

It would be beneficial if there were a feature allowing me to mark a specific point and seamlessly branch out to explore related topics, all while staying anchored to the initial core concept.