{"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-jh75li7n","versions":[{"created_at":"2026-06-10T22:52:49Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy54927201→quote20424136 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"eafd70be18a95fb4db3c5dd687cb79681c06f5bada3fdef1c64493b37b33cf52","version":10},{"created_at":"2026-06-10T16:22:59Z","element_count":91,"note":"5軸GA polish 56->94 by M5 (autonomous)","saved_by":"mcp","sha256":"71bd9db2b32537553061a14ff6ec00db403a9e5c14a2f29e418e488e9e5b412b","version":2}]}