{"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-qvz3pixz","versions":[{"created_at":"2026-06-13T20:14:48Z","element_count":83,"note":"5軸GA polish 39->94 by M5 (autonomous)","saved_by":"mcp","sha256":"7583fbf765c8d61c9b55d368aced37cecb256f8d8781b1caa7efe5e3ef7b4732","version":3},{"created_at":"2026-06-13T20:06:43Z","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":"5e3c52983a6d3eecd5bdc5bae1be83cfeac859509c75f9324fe02181cffcdbcc","version":2},{"created_at":"2026-06-13T20:06:43Z","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}]}