Client-Side Agent Optimization

AgentOpt's framing of developer-controlled agent optimization (model-per-role, budget, routing) as distinct from server-side serving; the combo abstraction; 13–32× cost gaps between best/worst combinations — reproduced in production by Cursor's four planner/worker mixes, where cross-role coupling shows up in the bill and the 'strongest model is the worst planner' result turns out to be a harness property