{"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-d4m5p0if","versions":[{"created_at":"2026-06-29T19:38:20Z","element_count":73,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"ffc1afae725fae883cf531bbd9528dda03b46518eb745599dd3285d3d79b86f9","version":3},{"created_at":"2026-06-29T19:25:02Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"fec6cdb123d1b0076d96962e9ee6808a6cffa3be201f632707edb5a99f93b8ea","version":2},{"created_at":"2026-06-29T19:25:02Z","element_count":105,"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}]}