{"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-f50mpzqw","versions":[{"created_at":"2026-06-10T22:52:45Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote21228016 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"c8ab6306a60a9fc50bd4665ef7e29e9bb7de9fdf2475ea61236016377906a2e8","version":12},{"created_at":"2026-06-10T15:53:05Z","element_count":91,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"4f231f76b0366f58c66d47c2ff732f8f58c0bf0db8e75f7ef24e58e40723584e","version":4}]}