{"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-k53s969x","versions":[{"created_at":"2026-07-03T06:03:15Z","element_count":85,"note":"5軸GA polish 43->96 by M5 (autonomous)","saved_by":"mcp","sha256":"83c6d5ef9e9c7578e2f850ba02fb963c53a35f423c7ca0620394a17d62abf4d9","version":3},{"created_at":"2026-07-03T05:50:01Z","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":"caf6db797f137bf106b741948faabe83b169e99395771519e4ac5e0a19cb7b30","version":2},{"created_at":"2026-07-03T05:50:01Z","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}]}