{"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-wdtg82l7","versions":[{"created_at":"2026-07-13T10:09:59Z","element_count":72,"note":"5軸GA polish 44->96 by M5 (autonomous)","saved_by":"mcp","sha256":"ca42645900f7287fd223e05ee44cab7d00c91603982acfbfa802546638bdab94","version":3},{"created_at":"2026-07-13T09:58:37Z","element_count":89,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"d43ac08307a11444597d9daa4576ffa678a5d1afbf22927d00671cad9087b2ca","version":2},{"created_at":"2026-07-13T09:58:37Z","element_count":89,"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}]}