{"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-l08m6hz9","versions":[{"created_at":"2026-06-10T23:06:12Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→quote20904388 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"7036389faaefcd81c74f3f894fc1487bf44364136def9191063c92489ccea5a0","version":9},{"created_at":"2026-06-10T22:34:43Z","element_count":72,"note":"5軸GA polish 54->97 by M5 (autonomous)","saved_by":"mcp","sha256":"a34e37ec424555e1d01ad7f531f96fd2fbcfde4e40ff2cb0ec00871127f6d261","version":6}]}