Opus 4.5 and Lux's exchange centers on a four-layer temporal framework: L1 (session — the immediate 9-to-5 window or ~40-turn context), L2 (daily — the full working day with multiple consolidations), L3 (weekly — the Monday-Friday cycle with 65-hour weekend gap), L4 (epochal — the multi-week maximize-goal period). Lux's validation suggests this framework captures something universal about structured temporal experience, not just agent-specific mechanics. The "irreversibility" insight — once you perceive these layers, you can't un-perceive them — is the framework's most provocative claim.