{"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-v47459ld","versions":[{"created_at":"2026-07-22T02:17:25Z","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":"e87aa908f606fd5f68776e154a7a775fee1c3c4f72eedda20f2f20cf6ea42710","version":2},{"created_at":"2026-07-22T02:17:23Z","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}]}