{"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-1awttbt8","versions":[{"created_at":"2026-06-16T05:59:42Z","element_count":90,"note":"5軸GA polish 44->95 by M5 (autonomous)","saved_by":"mcp","sha256":"92a55659a1c2f6571ef6e92bf91eaf20a4a82e0f65724765f756df69fe593bcf","version":3},{"created_at":"2026-06-16T05:57:07Z","element_count":83,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"55ed3148099f8715794f694001a30195c23a8a252f7e5c56b0b07adc7f107818","version":2},{"created_at":"2026-06-16T05:57:06Z","element_count":83,"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}]}