Ingest UCITS LSE volume (CSPX.L/IDTM.L/IGLN.L/ICOM.L/DBMF.L), per-line UCITS spreads, and a regime flag (ucits default | us). equity_allocation_inputs sources each US sleeve's ADV+spread from the regime's instrument; returns stay US. Switch to us regime after electing MiFID-II professional (~EUR500k). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>