=== BP no-pen 30ep seed=42 ===
BP + ‖f‖² penalty: seed=42, lam=0.0, epochs=30
  ep 1: test_acc=0.3920
  ep 5: test_acc=0.4950
  ep 10: test_acc=0.5296
  ep 15: test_acc=0.5539
  ep 20: test_acc=0.5721
  ep 25: test_acc=0.5813
  ep 30: test_acc=0.5851

FINAL test acc: 0.5851
Compare to:
  BP-trainable (3-seed mean):   0.609
  Penalized DFA lam=1e-2:       0.363
  DFA-shallow:                  0.349

Margin vs DFA-shallow baseline: +23.61 pp
  → BP+penalty intermediate; partial capacity loss + residual mode 2
Saved results/bp_no_penalty_30ep/bp_pen_lam0.0_s42.json
=== BP no-pen 30ep seed=123 ===
BP + ‖f‖² penalty: seed=123, lam=0.0, epochs=30
  ep 1: test_acc=0.3958
  ep 5: test_acc=0.4851
  ep 10: test_acc=0.5345
  ep 15: test_acc=0.5564
  ep 20: test_acc=0.5748
  ep 25: test_acc=0.5827
  ep 30: test_acc=0.5845

FINAL test acc: 0.5845
Compare to:
  BP-trainable (3-seed mean):   0.609
  Penalized DFA lam=1e-2:       0.363
  DFA-shallow:                  0.349

Margin vs DFA-shallow baseline: +23.55 pp
  → BP+penalty intermediate; partial capacity loss + residual mode 2
Saved results/bp_no_penalty_30ep/bp_pen_lam0.0_s123.json
=== BP no-pen 30ep seed=456 ===
BP + ‖f‖² penalty: seed=456, lam=0.0, epochs=30
  ep 1: test_acc=0.3969
  ep 5: test_acc=0.4957
  ep 10: test_acc=0.5344
  ep 15: test_acc=0.5612
  ep 20: test_acc=0.5716
  ep 25: test_acc=0.5845
  ep 30: test_acc=0.5863

FINAL test acc: 0.5863
Compare to:
  BP-trainable (3-seed mean):   0.609
  Penalized DFA lam=1e-2:       0.363
  DFA-shallow:                  0.349

Margin vs DFA-shallow baseline: +23.73 pp
  → BP+penalty intermediate; partial capacity loss + residual mode 2
Saved results/bp_no_penalty_30ep/bp_pen_lam0.0_s456.json
=== ALL DONE ===