Names of observations minimised by an adaptive strategy (e.g. ‘nsga2’). Each entry references an existing observation already framed lower-is-better (e.g. one_minus_fc, psd_mae). Count sets the semantics: 0 → pure sweep (use record), 1 → single-objective, ≥2 → multi-objective / Pareto. Ignored when strategy is ‘grid’. Forward-compatible with Search.objectives.