{"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-fw1i8p0g","versions":[{"created_at":"2026-06-10T23:39:59Z","element_count":83,"note":"5軸GA polish 50->97 by M5 (autonomous)","saved_by":"mcp","sha256":"956984e7d5e5b43d30067b0ffbb2ee8c22cf1b767a7b4fd38c132f6593cd0c28","version":11},{"created_at":"2026-06-10T23:09:21Z","element_count":44,"note":"legacy fix: rooms設備語除去 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"7f8ba97e311c839bf9715d78fa7442fa3add4b8d935a277dd6ced4ca226849c9","version":7}]}