{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-house-84y1s9mh","versions":[{"created_at":"2026-07-13T09:54:02Z","element_count":90,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"ac2854d75c5f59cd5843db9a094d55eaf57acdd306182ece97a8901ef8ca7130","version":3},{"created_at":"2026-07-13T09:39:13Z","element_count":130,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"841c120965375fb765835095a18b167b4de0a71fbfeafa0ae14ea26daf2ed69d","version":2},{"created_at":"2026-07-13T09:39:13Z","element_count":130,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}