{"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-95nce3tc","versions":[{"created_at":"2026-06-13T20:00:37Z","element_count":72,"note":"5軸GA polish 47->97 by M5 (autonomous)","saved_by":"mcp","sha256":"9bccdd4dcee80ecf5dcde653206f1c1115c54d1dbb530ad33fa2b6400e650352","version":3},{"created_at":"2026-06-13T19:43:54Z","element_count":87,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"8b851879342a203246de5fc51f8c77a164d3bb3f395df9472464b5d43443e027","version":2},{"created_at":"2026-06-13T19:43:53Z","element_count":87,"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}]}