OptionalColumnDecision-date column on the training unit when Mode is column.
none: assemble features as they are now (no point-in-time logic).column: a decision-date column on the training unit defines "as-of".offset: assemble as of N days before the label event.OptionalOffsetNumber of days before the label event when Mode is offset.
Point-in-time / "as-of" assembly strategy (plan §6.3) — the single biggest new correctness primitive. For forward prediction, features must be assembled as they were at the decision point, not as they are today, or the model leaks the future.