{"chapter":"last-call-01","checkpoint":"cabinet-envelope","resume":"/mystery/cabinet-envelope","links":[{"title":"The cabinet’s sealed envelope","url":"/mystery/cabinet-envelope"}],"question":"The cabinet’s sealed envelope","note":"Prepared checkpoint checklist, not a verified visit history. Personal notes stay in your browser tab until you explicitly download them; they are not sent to the server. Bookmark links contain only a public checkpoint name."}