{"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-ayz95h94","versions":[{"created_at":"2026-06-10T22:52:42Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy68153976→quote23104426 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"40d85262397a1169a8ad6124ece296bb5b02d47deca6c7c1cecae7980319329b","version":13},{"created_at":"2026-06-10T15:19:31Z","element_count":84,"note":"5軸GA polish 58->98 by M5 (autonomous)","saved_by":"mcp","sha256":"8b37eb5af8c9b57093e5841e2a1251220ec25570e809a15364d89fb204ac92bf","version":5}]}