{"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-i5cf7hvk","versions":[{"created_at":"2026-06-13T16:04:16Z","element_count":88,"note":"5軸GA polish 39->93 by M5 (autonomous)","saved_by":"mcp","sha256":"7aca18686e273ebdc3f29c6d96373d5850835c80230d04eb97ef0d40d301a525","version":3},{"created_at":"2026-06-13T15:55:16Z","element_count":101,"note":"loop3: 設計時延床 70.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"655ef3457dca3f980f95e645f040e49f52be41c96229e788d8be93f1b594e29a","version":2},{"created_at":"2026-06-13T15:55:16Z","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}]}