{"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-jlt2g1f4","versions":[{"created_at":"2026-06-13T14:20:46Z","element_count":90,"note":"5軸GA polish 43->95 by M5 (autonomous)","saved_by":"mcp","sha256":"cde641c2785eb188a2b07ef35abe8788ea4e59e319c3d59093c747feafeeba7c","version":3},{"created_at":"2026-06-13T14:15:36Z","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":"e318c187586dd96c9b7b1566220e943f4a53ae298a5b43890b042ca9d9163487","version":2},{"created_at":"2026-06-13T14:15:35Z","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}]}