{"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-d5xb1x7j","versions":[{"created_at":"2026-06-10T23:00:22Z","element_count":65,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote21228143 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"7a62fc61ad802f7c12ccff162043f8b3fb2917dd4a5d6f8ee650c2e7567accb2","version":9},{"created_at":"2026-06-10T21:11:05Z","element_count":91,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"e91bd842572744c649c0b68e79e694b9af2a3e9ef243bcb7cefe8ecf61d57c3f","version":3}]}