{"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-bljee4um","versions":[{"created_at":"2026-06-16T06:24:18Z","element_count":90,"note":"5軸GA polish 44->94 by M5 (autonomous)","saved_by":"mcp","sha256":"322ba6d000bd92a0ff15b4eb95c60c18df4bc6a855dbcb76a6e738d6f3541cce","version":3},{"created_at":"2026-06-16T06:10:23Z","element_count":101,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"803293294c95531b64d333f7df12a71715a924f29ceb158916ba897bed8258c5","version":2},{"created_at":"2026-06-16T06:10:22Z","element_count":101,"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}]}