- threshold: 0.80 → 0.50 (compress at 50%, not 80%) - target_ratio: 0.40 → 0.20, now relative to threshold not total context (20% of 50% = 10% of context as tail budget) - summary ceiling: 32K → 12K (Gemini can't output more than ~12K) - Updated DEFAULT_CONFIG, config display, example config, and tests