{"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-flv32mzw","versions":[{"created_at":"2026-06-10T23:23:54Z","element_count":84,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"2920ea1796e4d72925e6e3aff445a6dc8ade25f76062b0af54dbd3d79061688a","version":10},{"created_at":"2026-06-10T23:07:42Z","element_count":54,"note":"legacy fix: rooms設備語除去 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"050bc5f74366836fcc6824e9f0a62ee17c2c58ef8e3a43d92532482affa3f3a9","version":7}]}