What exact facts do AI rewrites most often change for you?

I’m launching KeepFacts on August 19. It compares a trusted source with an AI rewrite locally and flags changed, missing, or added dates, numbers, amounts, versions, URLs, emails, and must-preserve terms.

I’m not looking for generic upvotes. I’m looking for concrete misses and false positives: what exact item did your rewrite change, and did KeepFacts catch it?

Please use the built-in sample or non-sensitive text—nothing is uploaded. Try it here: https://masakinakao.github.io/keepfacts/?lang=en