Subagents are good when the harness (And agent?) understand how smart they are. My root level CLAUDE.md has pretty much just "use a lower tier agent when relev

Subagents are good when the harness (And agent?) understand how smart they are. My root level CLAUDE.md has pretty much just "use a lower tier agent when relevant". Then I daily-drive Opus, it automatically offloads simpler stuff to Sonnet or even Haiku based its own reasoning because it "knows" their capabilities. It's so much more cost/token efficient to do it like this. Opus writes the exact implementation plan for Sonnet and then waits for it to complete. After that it checks the work and fixes any issues itself. In Codex, for example, this doesn't work because the whole system doesn't know about agent tiers and barely can use subagents. So I'm just running Sol all the time.