{"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-sqts68j5","versions":[{"created_at":"2026-07-28T06:17:48Z","element_count":87,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"26b5c0db80f5fdbaae04c739bae8370450dd73c0208a63833b43e6f4cf811104","version":2},{"created_at":"2026-07-28T06:17:48Z","element_count":87,"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}]}