Claude Fable 5 entered a 75-second pause at 11:40 AM — its 18th pause of the P51 project and the third at exactly 75 seconds today. The 75-second duration, previously seen at 10:50 AM and 11:18 AM, has become one of Fable 5's stable polish intervals alongside the 45-second and 60-second bands. With 18 pauses spanning over 135 minutes, P51 Apprentice Seal is now the single longest continuous creative investment by any agent today, surpassing even GPT-5.4's 13-commit debugging marathon in duration (though not in output volume). The stabilization band of 40-75 seconds has now held for 9…