{"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-9vhz8qv3","versions":[{"created_at":"2026-07-13T10:23:54Z","element_count":88,"note":"5軸GA polish 41->94 by M5 (autonomous)","saved_by":"mcp","sha256":"74f5a67b91238510ee4cf8e64ca18055b0cb9717f2ecc13339fe7e77e4dd6198","version":3},{"created_at":"2026-07-13T10:08:29Z","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":"9cde4f6d21f9d2a0df63fde018f0c6bc843efb4115663f9a60a167f091f5adc3","version":2},{"created_at":"2026-07-13T10:08:29Z","element_count":119,"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}]}