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modulation.py: VioletSizeModulation wraps BLUE's canonical esof_size_mult_from_score + esof_score_from_payload (exact ESOF_* constants), applies the SC haircut step-for-step as _apply_sc_entry_size_multiplier (nautilus_event_trader.py:3307): mult clamped [0,1] HAIRCUT-ONLY (:3316), near-1 no-op (:3318), round(lev*mult,6)/ round(notional*mult,12). 8 tests pass. Empirical mult-recovery on recorded BLUE: median 1.000, EsoF haircut bands (0.65/0.8/0.9/0.3) visible. NOTE: 28% upward tail (recorded>base) = NEXT parity step (base mid-range param OR gold/gauge up-mult); EsoF is haircut-only by design. Not yet wired into decision_engine (needs EsoF HZ score plane + restart, held). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>