{"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-eqzh88tz","versions":[{"created_at":"2026-06-11T01:57:14Z","element_count":74,"note":"5軸GA polish 45->96 by M5 (autonomous)","saved_by":"mcp","sha256":"033d04ed58de7af35c5eeedeeea9b7e2834440f88efa5879c44d6ad02a7dd288","version":7},{"created_at":"2026-06-11T00:04:08Z","element_count":54,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"481fe1c5cec5bd51ec5df3d8dd0ebab2ce7a072b3e7b4a32138ceb5768aa47d7","version":2}]}