{"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-0t2vn1if","versions":[{"created_at":"2026-06-13T20:46:35Z","element_count":89,"note":"5軸GA polish 42->95 by M5 (autonomous)","saved_by":"mcp","sha256":"67012f689ad935b9a02adf7a2a45d4fda9fdbe53b4dc31f1ff6c57356f7ce9cc","version":3},{"created_at":"2026-06-13T20:28:25Z","element_count":101,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"fe4aaa1cb540b657cb245d173efd042b42621f9eb86a3b12035b9a3118773118","version":2},{"created_at":"2026-06-13T20:28:25Z","element_count":101,"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}]}