{"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-wydsgh8z","versions":[{"created_at":"2026-06-23T06:08:26Z","element_count":83,"note":"5軸GA polish 42->95 by M5 (autonomous)","saved_by":"mcp","sha256":"49222550ec6418914d7400bbf856d8e332e3a42b9341aca7971ef1a7ef865fdc","version":3},{"created_at":"2026-06-23T05:57:21Z","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":"d1be5a5cbabb0fc1541f467541f8264083e95b502471271261231ea5ce81f022","version":2},{"created_at":"2026-06-23T05:57:21Z","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}]}