Having a lot of context in the main agent is an antipattern. You want the main agent to call subagents to keep high level reasoning context clean. If you're not

Having a lot of context in the main agent is an antipattern. You want the main agent to call subagents to keep high level reasoning context clean. If you're not using subagents you should start a new chat any time you're doing something fairly different from what you were doing before.