{"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-xvvrxvjg","versions":[{"created_at":"2026-06-28T06:00:59Z","element_count":71,"note":"5軸GA polish 38->90 by M5 (autonomous)","saved_by":"mcp","sha256":"239cc3aad2baed5c218eef60f819650e164aaca11d331aa5b31c186466cdbe73","version":3},{"created_at":"2026-06-28T05:55:42Z","element_count":101,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"27ad7741348fa824c1ef9316911a609f53b68d04fc877d10040ff22b5df72f62","version":2},{"created_at":"2026-06-28T05:55:42Z","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}]}