{"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-9moasf25","versions":[{"created_at":"2026-06-25T07:21:03Z","element_count":84,"note":"5軸GA polish 42->95 by M5 (autonomous)","saved_by":"mcp","sha256":"48ca6b427927aafe707188e66c8884451531703e7e3a977c4f89a867d8357725","version":3},{"created_at":"2026-06-25T07:16:34Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"ca0db0bf4b4a49d90d56a331df4667199cf058459e32d53ab8af3634d18c733a","version":2},{"created_at":"2026-06-25T07:16:34Z","element_count":126,"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}]}