{"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-7ro2xo7n","versions":[{"created_at":"2026-06-10T22:53:15Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy44363808→quote19805192 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"94ca30218fb0b08af693e7569d6b40dc90bb3bce1bdd30eacbd794196e7bf345","version":10},{"created_at":"2026-06-10T16:55:13Z","element_count":85,"note":"5軸GA polish 52->94 by M5 (autonomous)","saved_by":"mcp","sha256":"b897b060a11894a8968c9800be686f49287db3ad2a5e33f93e390a57ceb39cdc","version":2}]}