{"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-ut34q7n7","versions":[{"created_at":"2026-06-18T19:45:50Z","element_count":82,"note":"5軸GA polish 39->93 by M5 (autonomous)","saved_by":"mcp","sha256":"0f25c797d2dd339e32505814a722f45a629845320550fee616c536e062895bdc","version":3},{"created_at":"2026-06-18T19:35:17Z","element_count":119,"note":"loop3: 設計時延床 70.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"c357641e362db089a92ae314ca670aff73fad7852f0e49a2e945e7fc03db7b51","version":2},{"created_at":"2026-06-18T19:35:14Z","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}]}