Any way to use RTK to "compact" a conversation in chat history AFTER the chat had been generated?

[KernelBypass]

RTK may decrease cache hits. So, for some, it makes sense not to use it during the chat.
But once the chat is approaching the max context window limit (say, 1M in Claude), is there any way to use RTK to rebuild the chat history to reduce the context footprint?

So, like loseless compacting done post factum.