{"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-8fgq0t4x","versions":[{"created_at":"2026-06-10T22:54:53Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→quote20180810 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"a45fe58ca63f08dfba5bcc2052d13f40015797b7579da7ede8730cf84a2211d6","version":10},{"created_at":"2026-06-10T17:56:44Z","element_count":73,"note":"5軸GA polish 58->97 by M5 (autonomous)","saved_by":"mcp","sha256":"07dd01408bb00b5fbb5a4cfcccca191a842ac18452ff37f842f514e1fb98a029","version":3}]}