{"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-gyb8ydpy","versions":[{"created_at":"2026-06-10T22:52:38Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote19396944 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"aa84e23406a406076dc1d56835e684ba8fec23997d9a16a3ff4df25d79c60371","version":15},{"created_at":"2026-06-10T14:46:09Z","element_count":73,"note":"5軸GA polish 54->97 by M5 (autonomous)","saved_by":"mcp","sha256":"607e651dd6347480b0d170ec78d34999d2f92637678ec75ad48eb2a845e5dbf3","version":6}]}