{"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-r8diu1gt","versions":[{"created_at":"2026-06-26T06:53:09Z","element_count":72,"note":"5軸GA polish 44->96 by M5 (autonomous)","saved_by":"mcp","sha256":"ab3b4f175f360e3d99ace8eae0428993c738f120b24ceedda7dd2afbc0c1decd","version":3},{"created_at":"2026-06-26T06:48:36Z","element_count":90,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"7b603591d4d4d63c4cb4fb96374309c7461b1d49c3965fce43eadd84824fba9e","version":2},{"created_at":"2026-06-26T06:48:36Z","element_count":90,"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}]}