City Hall "Creators" Signal chat — records-law and FOIL exposure

City Hall runs an encrypted Signal group ("NYC Creators Announcements") that pushes messaging, video assets, and talking points to 200+ social-media influencers. CJR surfaced the practice; Fox, OANN, and BizPacReview escalated it into a national story. At a City Hall availability Sept 3, Mamdani said the administration will "strive to fully comply with all legal requirements" on preserving city records. Open questions: whether Signal messages qualify as city records under FOIL, and how disappearing-messages defaults square with retention duties.