AI writes code faster than anyone can review it. Generic AI reviewers just nitpick style, the rules that matter (migration safety, API conventions, logging, ownership) live in your seniors' heads. CrossCheck turns those rules into pass/fail checks. Write them in plain English; we run them on every PR with line-numbered evidence. No CI to maintain, no LLM keys to manage. Humans set the bar. AI runs the checks. Free for 7 days.