{"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-mccdtt5m","versions":[{"created_at":"2026-06-13T16:42:36Z","element_count":71,"note":"5軸GA polish 43->95 by M5 (autonomous)","saved_by":"mcp","sha256":"1b2689afc44d18ba74babab3a3a2e5ebb40ee7efc734a4d04ddf3b34e57b8ec4","version":3},{"created_at":"2026-06-13T16:26:50Z","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":"70ffe8ec2fe33064a80d8cd06dfc6af4ccb0c74ed1e514fdf95ef2320d1c8b67","version":2},{"created_at":"2026-06-13T16:26:50Z","element_count":126,"note":"言葉から生成: LDK+主寝室+子供室+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}