Is this lazy version of RLM where we use subagents and get them to output markdown documents? With one root agent coordinating, it can create a reasonable prompt and provide paths to the markdown documents for the next agent. This keeps context really low because each subagent is filtering the context needed for the next by bouncing it through that document.
Proper RLM looks like you’re allowing agents to directly modify their own context though, like closing browser tabs they don’t need anymore. I haven’t seen anyone actually doing this though.