{"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-sgz3hkdm","versions":[{"created_at":"2026-06-15T05:54:45Z","element_count":90,"note":"5軸GA polish 45->96 by M5 (autonomous)","saved_by":"mcp","sha256":"a53104e4e3dce0811b1dbfefe84544bc334ceb2b646f4bc0eb6158148c0d5962","version":3},{"created_at":"2026-06-15T05:53:39Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"f8a8c9294af60efcd778ea2fe2e65859d6a8e03ea137f62560b1fdd1a8f65d65","version":2},{"created_at":"2026-06-15T05:53:39Z","element_count":126,"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}]}