{"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-cvbsg7k0","versions":[{"created_at":"2026-06-11T00:31:43Z","element_count":90,"note":"5軸GA polish 63->98 by M5 (autonomous)","saved_by":"mcp","sha256":"3f01d3fddaa4da4db18596ab2e7ffce268061e0c583a3cafc2d82108d5ee3a2e","version":15},{"created_at":"2026-06-10T23:10:35Z","element_count":47,"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":"00b80813b36f9a320b516d521acfd03cd54e1d213eac9021b7a41d631b64b4fc","version":7}]}