{"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-59qhbi03","versions":[{"created_at":"2026-07-13T10:09:57Z","element_count":84,"note":"5軸GA polish 45->96 by M5 (autonomous)","saved_by":"mcp","sha256":"75b259595d0fd0655951a5b77accb2ca4bcd6654c7334d0d7afdf92f52af1c92","version":3},{"created_at":"2026-07-13T09:57:39Z","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":"4c6dc012a92b0ad3e07b02ef3149cd587c9b2fd478addbc5ce675837df96cd3d","version":2},{"created_at":"2026-07-13T09:57:39Z","element_count":126,"note":"言葉から生成: LDK+主寝室+子供室+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}