{"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-1w4sr3hg","versions":[{"created_at":"2026-06-11T00:31:36Z","element_count":72,"note":"5軸GA polish 57->95 by M5 (autonomous)","saved_by":"mcp","sha256":"e36a43fe2f8661b30220418e8dadbbb31ed101ce724f2d65e4ffe3f2e078e371","version":15},{"created_at":"2026-06-10T23:10:14Z","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":"1b57ac526f95891b206d59a871c1cc8387875506b2de38b9672e5492ba5a5519","version":7}]}