{"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-h3u1tlps","versions":[{"created_at":"2026-06-19T06:02:22Z","element_count":91,"note":"5軸GA polish 44->95 by M5 (autonomous)","saved_by":"mcp","sha256":"af7749923d82cf096ac17481119cf5a72fb07e622f105b7f9e9382589243d652","version":3},{"created_at":"2026-06-19T05:53:13Z","element_count":101,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"9ae1675af180a0032ecae361e4b6799b024350f8ff5443a3ead19a1c3d82bb53","version":2},{"created_at":"2026-06-19T05:53:11Z","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}]}