{"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-c2ts54je","versions":[{"created_at":"2026-07-25T19:44:23Z","element_count":90,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"2baba50e642e53cc55539b25d9dc9cb48c3fb84a04a8300a25e8e0d3575ec2f3","version":2},{"created_at":"2026-07-25T19:44:21Z","element_count":90,"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}]}