{"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-1fg5bwli","versions":[{"created_at":"2026-07-03T19:41:50Z","element_count":91,"note":"5軸GA polish 45->96 by M5 (autonomous)","saved_by":"mcp","sha256":"995e1ebc761fbdb49b97d981b80c98f00495bced28a2633414287145b656a715","version":3},{"created_at":"2026-07-03T19:30:31Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"e06e974e7b5a0306babbb2aff3caf2b9313e93293a80fbe6c741e7983bab09c2","version":2},{"created_at":"2026-07-03T19:30:31Z","element_count":105,"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}]}