{"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-q2oouro4","versions":[{"created_at":"2026-06-10T22:52:49Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy69320160→quote20131232 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"1caf49720d40d0caadf74365a7631231d19ad724b0159b0ecfe43bf476a0d3ab","version":10},{"created_at":"2026-06-10T16:22:48Z","element_count":70,"note":"5軸GA polish 54->93 by M5 (autonomous)","saved_by":"mcp","sha256":"9851ac5e4e6c9ca98bfea25834892c4c67c84272747e72b69875bf14c7d2de51","version":2}]}