{"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-1pu9p595","versions":[{"created_at":"2026-06-13T16:42:40Z","element_count":73,"note":"5軸GA polish 42->93 by M5 (autonomous)","saved_by":"mcp","sha256":"55cb609636b0b061cfa442ebf2dbb04662f6ef69546e9198be84ba796ff65cf2","version":3},{"created_at":"2026-06-13T16:31:56Z","element_count":86,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"f7a936e2878937342828417e02b4a1e9c46dc0d22d22f1ef691cf97adc258790","version":2},{"created_at":"2026-06-13T16:31:55Z","element_count":86,"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}]}