{"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-e61kpvv5","versions":[{"created_at":"2026-06-17T06:03:13Z","element_count":82,"note":"5軸GA polish 41->94 by M5 (autonomous)","saved_by":"mcp","sha256":"ebf53b27de134fc0e46cedef8a79cdfd557bf48df0b356bacac8689d7f2d7792","version":3},{"created_at":"2026-06-17T05:54:18Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"ea353f55111370e77ffb641d4739cdee03aaa762e77ed9ed90a932b7747b89e7","version":2},{"created_at":"2026-06-17T05:54:17Z","element_count":119,"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}]}