{"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-2289mlra","versions":[{"created_at":"2026-07-15T19:35:08Z","element_count":84,"note":"5軸GA polish 45->96 by M5 (autonomous)","saved_by":"mcp","sha256":"a57486cdea5d746d235d1ba7c4425db7b23f15d92df6247a3b21263d52f407c8","version":3},{"created_at":"2026-07-15T19:29:03Z","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":"9707c0e28ccab06f34bdd9340e1b6b8f7d3c07ac4a17201ec0ce082883d48c73","version":2},{"created_at":"2026-07-15T19:29:03Z","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}]}