{"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-7wib3c56","versions":[{"created_at":"2026-06-26T19:32:09Z","element_count":73,"note":"5軸GA polish 41->92 by M5 (autonomous)","saved_by":"mcp","sha256":"1ec329594860d2605fdaf5959a848217979dfc54a657f45bca2aaeccb646ab66","version":3},{"created_at":"2026-06-26T19:24:28Z","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":"73b0d77fc2666f3785bfd04bcf0b5ec4d5683fdd714731faee9570e3006da996","version":2},{"created_at":"2026-06-26T19:24:28Z","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}]}