I try to work on planning docs, scrutinize them a fair bit to look for edge cases or anything that stands out as a problem, whatever.

Then break down the work further into meaningful chunks and hand those out to agents. Mostly one agent at a time but with the directive to use subagents as needed for implementation/review/whatever other perspective I want.

I feel like I'm exercising my brain similarly to how I had in the past. Before LLMs we'd whiteboard things similarly and figure out if a design made sense and like you said, chunk it into Jira tickets. it's really just the implementor (?) that's changed.