{"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-612wxs25","versions":[{"created_at":"2026-06-14T17:43:13Z","element_count":89,"note":"5軸GA polish 42->95 by M5 (autonomous)","saved_by":"mcp","sha256":"210d608ccc6f3d150b7cb7967f19185dcace0007f995c791744d31b01b86c7d8","version":3},{"created_at":"2026-06-14T17:35:02Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"5c2fb755c56bb9948551874dcb7d31e25f0d59a8a0da7a6fb6f1e521fdacf539","version":2},{"created_at":"2026-06-14T17:35:02Z","element_count":119,"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}]}