sl_distance = max(pnl_ema_loss, atr_mid_ema) per pearl_blend_formulas_must_have_permanent_floor. Fires force-flat (3, 0) when unrealized_pl_per_lot drops below -sl_distance. Multi-horizon mask averaging + trail trigger land in Tasks 5-6. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>