{"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-willowbrookhouse-uxknh0vu","versions":[{"created_at":"2026-06-10T22:53:49Z","element_count":66,"note":"legacy fix: jpy90050184→quote21673268 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"08d742274cf77127e5c025a6700c040bdec33e85ed3ba9782c59670cec93f332","version":10},{"created_at":"2026-06-10T17:08:52Z","element_count":90,"note":"5軸GA polish 43->98 by M5 (autonomous)","saved_by":"mcp","sha256":"3878ec74cc88142ebf486040e65d085960f29bb0995e420791bcbc56b802dfff","version":2}]}