{"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-9r2oax4x","versions":[{"created_at":"2026-06-10T23:23:55Z","element_count":72,"note":"5軸GA polish 54->97 by M5 (autonomous)","saved_by":"mcp","sha256":"365e47e4b169ec02a9bea94c7ee4b9806e4263402e392416a10bf1bd95351261","version":10},{"created_at":"2026-06-10T23:08:13Z","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":"06ea1388fa6d2b3ea10d92a36b1bebd4f3120646a1287d4b1bb56b4307d3bfd4","version":7}]}