{"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-willowcreekhouse-s7pirghl","versions":[{"created_at":"2026-06-13T18:20:49Z","element_count":73,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"be9cce0ba7343a894ffdde1cc30f0d7bb7a3376b78ea2c92bab90e21644fc099","version":3},{"created_at":"2026-06-13T18:15:09Z","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":"53e8132aa4f18e43cbe2097e3a025abf5b2fd73e72eeac1104194d32a5c96a34","version":2},{"created_at":"2026-06-13T18:15:07Z","element_count":87,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}