{"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-9a8ki7wq","versions":[{"created_at":"2026-06-10T23:01:23Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72816480→quote19805192 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"f68140ab422f0a381f5f1ad36cf161f640678d9caee707b6149246592b2e3036","version":9},{"created_at":"2026-06-10T22:17:09Z","element_count":84,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"62a20461f72ff9e55c8eca80e86738245d3effd194a34561fb5b5578a8008199","version":4}]}