- The breakeven study grades at the shadow book's capacity AND risk per trade, and labels each with where it came from. A missing setting row now reads "shadow_book default" instead of crediting the setting; the committed report said shadow_book_capacity though the snapshot has no such row. - _production_book_config reads strategies through the same _portfolio_monitor_strategies() hook as the monitor. - breakeven_gate_reset is rejected when there is no post-stop episode or cooldown for it to start, and the study skips its diagnostic arm for a book without one, so a production config change cannot abort the run. - identical_to_control is renamed ties_control_on_graded_metrics and needs real values: be_2r ties on every graded metric but still changed 2 trades. - _BookConfig drops an unused field and hashes by identity; the min-R:R sweep swaps its gate in with dataclasses.replace instead of passing it. - New tests cover the parity guard's success path, the no-config fallback and the gate-reset check. The breakeven report is regenerated: every row, diagnostic row and the parity check are identical; only the labels, the risk fields and the renamed flag changed. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>