{"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-rq6lkp7k","versions":[{"created_at":"2026-06-10T22:56:02Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote20954809 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"22b7e99d54e005599fdb12329c1ea9a263ca0fcb0f83f35a1551439904a28991","version":10},{"created_at":"2026-06-10T18:29:56Z","element_count":91,"note":"5軸GA polish 56->98 by M5 (autonomous)","saved_by":"mcp","sha256":"219ebbc5c5c1f30dc547d0a627928bf524785cb9bcf159b9458144d3319b379b","version":3}]}