{"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-e8ygaepa","versions":[{"created_at":"2026-07-20T19:38:55Z","element_count":72,"note":"5軸GA polish 45->94 by M5 (autonomous)","saved_by":"mcp","sha256":"9115824ff7aa581afdfbdfc54a28325c373d1a3f983accc1d8d09c2d8078cab1","version":3},{"created_at":"2026-07-20T19:36:27Z","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":"54fe10b2bf3ccdfbf517a2d487bfdcdd58d9d3b0ea9b3e62f3a89a2300e03b28","version":2},{"created_at":"2026-07-20T19:36:27Z","element_count":88,"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}]}