{"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-ovalvillagehouse-w04o5si0","versions":[{"created_at":"2026-06-24T04:37:12Z","element_count":88,"note":"5軸GA polish 41->94 by M5 (autonomous)","saved_by":"mcp","sha256":"254f136d9505ea56b8a7fc2df1496d4f75a86e023798e9f932f76ead22d94dd3","version":3},{"created_at":"2026-06-24T04:30:04Z","element_count":86,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"63e385fbf8f3e388178b911aa32144fe11d1b7a3b356db224068a0cf828f6faa","version":2},{"created_at":"2026-06-24T04:30:03Z","element_count":86,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}