{"model":"deepseek-4.1-flash","title":"Accumulated multi-turn prefix validated","status":"positive","summary":"8-turn accumulating conversation (~13k tokens): fact planted turn 1 recalled exactly on turn 9 (MULTITURN-885440-K); recall turn 1.4 s via prefix cache.","occurred_at":"2026-09-11T09:22:00Z","notes":"8-turn accumulating conversation (~13k tokens): fact planted turn 1 recalled exactly on turn 9 (MULTITURN-885440-K); recall turn 1.4 s via prefix cache."}