{"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-oz2hzlf4","versions":[{"created_at":"2026-07-17T19:41:17Z","element_count":84,"note":"5軸GA polish 43->97 by M5 (autonomous)","saved_by":"mcp","sha256":"bc5db691c85e7f34ff5ceca33a5ed71134cf51808c5e1c2c91356033958bbaa1","version":3},{"created_at":"2026-07-17T19:29:38Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"a19808aec1fcacf451e6381da326823cf79a7b8ea060f78088de3f57f5bc3b47","version":2},{"created_at":"2026-07-17T19:29:38Z","element_count":105,"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}]}