w_risk_fc grows from AH*(SH2+9) to AH*(SH2+13). Risk branch now sees all 12 ISV signals (including 4 regime: velocity, disagreement, transition_ema, stability) + predicted_error. Forward + backward updated with wider stride and 12-signal loop. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>