{"domain":"chemistry-calc.x402tookit.com","count":1,"changes":[{"captured_at":"2026-10-21T05:03:31.693697","card_hash":"535172419d4486e10ebc83c55656558423348083c5473c22015001fdc713d80c","previous_card_hash":null,"diff":{"skills_added":[],"skills_removed":[],"skills_changed":[],"fields_changed":[],"other_changed":true,"is_empty":false,"human_summary":"internal fields changed"}}]}