chamber-eval run --task cocarry --policy happo_blind_manifest:spikes/results/benchmark/cocarry-v1/selection/b-blind_selected_manifest.json --partner-set cocarry_partners@v1 --exclude-member imp_nominal --seeds 5 --episodes 50 --out spikes/results/benchmark/cocarry-v1/b-blind-2026-07-06 --prereg spikes/preregistration/benchmark/cocarry_baselines_v1.yaml
