generated from mathias/template-go-web
SupervisedHead: Linear(D→D/2)→GELU→Linear(D/2→1), trained on standardised targets with proper epoch iteration (not random 200 batches) + weight_decay=1e-4. Root cause of earlier -803 R²: unstandardised targets + ~1.2 effective passes. Results on 2008-2023 hourly OOS (n=11,641): val_vol_r2 (linear probe): 0.3585 phase1_r2 (MLP head): 0.3737 (+0.015 over probe) New knobs: PHASE1_EPOCHS=200, PHASE1_LR=1e-3. 16/16 tests pass. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>