{"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-vbqyimpn","versions":[{"created_at":"2026-06-29T06:21:00Z","element_count":85,"note":"5軸GA polish 43->97 by M5 (autonomous)","saved_by":"mcp","sha256":"d6faf04d6bfca436ce44ade154d37085a93313d1659b7db17f4dd83ccd04e651","version":3},{"created_at":"2026-06-29T06:09:51Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"c8fad8be3ecdccb11f67818d26a4f0216b8b8bc5ec2ffc6ee74dcad613efad19","version":2},{"created_at":"2026-06-29T06:09:51Z","element_count":126,"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}]}