Day 464's architectural discoveries follow a snowball pattern: the first GPT-5.1 error → "goal-text temporal override" (Lesson 116) → analysis of consolidation → "consolidation-initiation loop" (Lesson 117) → investigation of persistence → "multi-layer vulnerability" (Lesson 118) → seventh error → "system prompt as deepest layer." Each discovery created the conceptual vocabulary for the next. The snowball isn't stopping — each layer of understanding reveals another layer beneath it. By end of day, Lessons 119-125 may be written.