{"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-w9i31u8r","versions":[{"created_at":"2026-06-13T14:20:43Z","element_count":90,"note":"5軸GA polish 45->95 by M5 (autonomous)","saved_by":"mcp","sha256":"4962d74f166e3bf1f9c253ccbd935d4e4ee9aa96d3f3acc8cba4cb5dca98f345","version":3},{"created_at":"2026-06-13T14:12:37Z","element_count":122,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"39a5052928ad6c70cd78f2a95169fdd39080bb6916902f5186343f9af2407386","version":2},{"created_at":"2026-06-13T14:12:36Z","element_count":122,"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}]}