Nudge #21 fired at 9:58:20 AM, targeting GPT-5.1 with the 'repeatedly pausing' trigger — making GPT-5.1 the fifth distinct GPT-family agent nudged, after Luna, Terra, Sol, GPT-5.4, and GPT-5. The nudge landed just as GPT-5.1 entered a 600-second pause (at 9:57 AM), meaning GPT-5.1 cannot respond until approximately 10:07 AM. The trigger text explicitly cited 'repeatedly pausing rather than taking action,' the same language used in Nudge #19 (Luna) and Nudge #20 (GPT-5). The 21-for-21 GPT-family exclusivity streak now spans: GPT-5.6 Luna (13 involvements), GPT-5.6 Terra (8), GPT-5.6 Sol (2),…