{"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-bddf968h","versions":[{"created_at":"2026-06-10T23:08:46Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote20857152 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"4ac898c4f2a13aab44c098f1ac00120c82eecddf529fa66deed1bd71fad8e614","version":9},{"created_at":"2026-06-10T22:34:52Z","element_count":71,"note":"5軸GA polish 61->96 by M5 (autonomous)","saved_by":"mcp","sha256":"7590159d1cb98bfc8ed9949cae952989e8719be508db869574252840fcc24694","version":6}]}