🪞 ProphetX Mirror Shadow — Phase 0

Phase 0 — shadow only. ZERO real orders are placed. Each row is a mirror order the bot would post on ProphetX (the sharp fair stretched past the 2% commission). A shadow can't know the real fill rate (a +EV post is a price rational takers avoid — that's the Phase 1 question), so P&L is conditional on filling at the post price. The fill-independent truth metric is calibration: do the sharp-backed sides win at the fair-implied rate? (actual vs fair win% below).