Readiness jumped from 0 to ~0.8 in one step when CV first improved,
causing per-sample support to snap from [-1,1] to V(s)-centered
discontinuously. Same adaptive alpha pattern as eval_v_range:
α = |error| / (|error| + 0.05), clamped [0.01, 0.3]. Smooth ramp-in.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>