{"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-d4hxs6lu","versions":[{"created_at":"2026-07-25T11:59:42Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"37ddcb94d7d0dbab321d1b10c0cc76ff3253526d828dffaa7ce28485991ab7be","version":2},{"created_at":"2026-07-25T11:59:39Z","element_count":105,"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}]}