{"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-lindengrovebungalow-vxxs0ho2","versions":[{"created_at":"2026-07-07T17:40:14Z","element_count":85,"note":"5軸GA polish 48->98 by M5 (autonomous)","saved_by":"mcp","sha256":"850d3f90f338fdf455eac12dccc9ef28fd2cf5147f5abffbcc4d6cfcb41c59fe","version":3},{"created_at":"2026-07-07T17:30:47Z","element_count":138,"note":"loop3: 設計時延床 95.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"ecf3684b181d58d6448c54b942cb681e8043068eccf1547a6da419ab89fdb1ae","version":2},{"created_at":"2026-07-07T17:30:47Z","element_count":138,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}