{"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-pj77pbmc","versions":[{"created_at":"2026-06-10T23:57:10Z","element_count":71,"note":"5軸GA polish 54->97 by M5 (autonomous)","saved_by":"mcp","sha256":"a6e259d2d178cf4a64a9c6f22920977bc50dd9ada562d1115a1d2fc8f23f979f","version":12},{"created_at":"2026-06-10T23:09:49Z","element_count":50,"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":"17dbefa2ba982a47b1c1d329dc0afe0e4831e185b0752453322599b5c1a129d3","version":7}]}