{"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-9zp41k4q","versions":[{"created_at":"2026-06-10T22:52:41Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy61441200→quote24278376 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"6fbf2eabc513cf781d024b5c87026ee5c0a8a288d9a26abf35fdadb9081c284b","version":14},{"created_at":"2026-06-10T15:19:22Z","element_count":84,"note":"5軸GA polish 61->97 by M5 (autonomous)","saved_by":"mcp","sha256":"14fb95a2facc8e093b40d46e3b819efcf4a9c1c06bd94b41b35418037dcddab0","version":6}]}