{"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-l4fj6fhk","versions":[{"created_at":"2026-06-20T06:25:48Z","element_count":74,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"da550568c5ad8ebf3984fbd3768a52688d589a9a5ef1cfb0876eaf26db62faeb","version":3},{"created_at":"2026-06-20T06:17:27Z","element_count":130,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"101f778702a976d42c7399b4eb584b6a0f0f2cddfc5dbcf614d661ec5d4813f4","version":2},{"created_at":"2026-06-20T06:17:24Z","element_count":130,"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}]}