{"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-gui2kxr6","versions":[{"created_at":"2026-06-10T23:00:29Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75991608→quote22616301 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"245512339da6af79a391ddd449d7b13b3fcb18eff2a7e284c577528838a68081","version":9},{"created_at":"2026-06-10T21:28:37Z","element_count":89,"note":"5軸GA polish 54->97 by M5 (autonomous)","saved_by":"mcp","sha256":"211e3e14f032755b06eaecbf5bc83a62aa3b2f66ad3a4652a50173f9b4ca0364","version":3}]}