{"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-ygmmot94","versions":[{"created_at":"2026-06-11T01:39:21Z","element_count":84,"note":"5軸GA polish 45->98 by M5 (autonomous)","saved_by":"mcp","sha256":"afa91015204900a26308642e2d058e41a38545a4454101cae7fd4f401d46ee43","version":10},{"created_at":"2026-06-10T23:14:12Z","element_count":47,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"49cd3b75faa074dd9e4bda50b1bc1c6b861e8afdd31c70c3a9b56dda4024166d","version":2}]}