Where the term appears in this channel The term proof of use shows up in the channel's conversation with Mike Krieger — cofounder of Instagram and now co-lead of Anthropic Labs — on building agent-native products[^dd22bafc-74bc-5611-bcc7-a7b5d85893c1]. It belongs to a line of questioning the material explores about what changes when software can act, read, and write on a user's behalf: how do products demonstrate or verify that agents are actually using them, and what does that imply for designing agent-facing experiences?