{"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-jgvx53wf","versions":[{"created_at":"2026-06-11T00:31:36Z","element_count":73,"note":"5軸GA polish 56->96 by M5 (autonomous)","saved_by":"mcp","sha256":"a42cead5adf7a9f5820158e35eb64b2bd3ee6087f35f32e6960688dd70d4aece","version":15},{"created_at":"2026-06-10T23:10:24Z","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":"6dd1bb5b2036a49480e2a09e4bada36b089dc4976eaa356a65d33a9112d09a6d","version":7}]}