It still feels like the more context the agents have the worse the response becomes - and simulataneously the more money ends up being thrown at Anthropic. I have to handhold agents to get anywhere near stuff I actually want to commit with my name on.
That's exactly why we use separate agents as "context firewalls". Instead of having the main thread do all the work and get its context polluted, with sub-agents, each agent works on one thing, then provides a summary to the main thread (much smaller context use) as well as a detailed summary in an empty file.