{"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-03kng9md","versions":[{"created_at":"2026-06-13T20:46:39Z","element_count":83,"note":"5軸GA polish 45->95 by M5 (autonomous)","saved_by":"mcp","sha256":"7c3e528e83b2c4bb01d2a293af7944c85afaca43cd87e67e262b4bdc643175ee","version":3},{"created_at":"2026-06-13T20:41:20Z","element_count":88,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"769f84b44b74badcba6c94265692079ca4c140f1959d891ff03ebfdadc8bc4dc","version":2},{"created_at":"2026-06-13T20:41:17Z","element_count":88,"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}]}