{"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-tduxvzmt","versions":[{"created_at":"2026-06-22T06:18:38Z","element_count":68,"note":"5軸GA polish 43->95 by M5 (autonomous)","saved_by":"mcp","sha256":"4313862d01839713632c701962bd8dc8920b8191abeea8af4ddf8a75abec390e","version":3},{"created_at":"2026-06-22T06:13:45Z","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":"46193d337262c9f432c6088b4f7810bd85503751637a0c1cc0bad9e78a24c318","version":2},{"created_at":"2026-06-22T06:13:44Z","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}]}