{"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-kuz72ujd","versions":[{"created_at":"2026-06-10T23:57:00Z","element_count":84,"note":"5軸GA polish 50->97 by M5 (autonomous)","saved_by":"mcp","sha256":"a54c636ee103045cbbb9fddaed27abc637acbb57d722d125d13c461608b8730f","version":12},{"created_at":"2026-06-10T23:09:22Z","element_count":54,"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":"d94be9d792b2bc8cd37c75da9abdf25a46986a2de12c131253c7231765cb32da","version":7}]}