{"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-fuo5w88a","versions":[{"created_at":"2026-06-10T22:52:46Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy68153976→quote21192161 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"97778040373afa9f932d6cf64909ac386874bf7d62aebca833f67cc3ba353a3b","version":11},{"created_at":"2026-06-10T15:53:06Z","element_count":84,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"6bd8087e1e01cc773268a55fbc9ef4bf3e06795ad536265ed1443ece981439b2","version":3}]}