Compare the categorization rule engine against a company's current books without changing anything. Returns how often the engine would agree, what it would newly claim, what no rule matches, and the rows where it would book differently — each naming the rule that would have claimed it. Rows a person booked themselves and rows in closed months are counted apart and left out of the agreement rate, because the live engine would not touch them. Rule and account breakdowns split each key by verdict. Read-only.