{"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-lv63e0ud","versions":[{"created_at":"2026-06-10T22:53:13Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy52954560→quote20863604 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"a78a956b2d2d261793cbd3ef02154b7b32149f3058062127222b130ddf2c8f39","version":10},{"created_at":"2026-06-10T16:55:08Z","element_count":72,"note":"5軸GA polish 60->92 by M5 (autonomous)","saved_by":"mcp","sha256":"f437d13dd6e15967624aade9b12972b90528dfcf8cfcbf54e01a8a938cd7d3a9","version":2}]}