I think there are caveats anyway.

1. What happens if it overflows during assistant's turn, while it makes tool calls? Is it better to make a compaction in the middle of the chain of tool calls, or maybe before a potentially long chain of tool calls? If latter, how to choose the right point for compaction?

2. There should be enough space in the context window for a summary. What if, theoretically, a single new user message already overflows the context window? Or what happens if a summary is too long?

Maybe those are stupid questions, but I'm making a point that there is a room for going in-depth.