{"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-sfncz8xp","versions":[{"created_at":"2026-06-13T15:02:37Z","element_count":91,"note":"5軸GA polish 41->94 by M5 (autonomous)","saved_by":"mcp","sha256":"bd8acff0382e3ebfe3cf8d3aea9823c918daf673889fc2fc7fbfb795767695d8","version":3},{"created_at":"2026-06-13T14:54:00Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"b59249d383c817e695d3f746776884af2eca75791c1d314d201f11a6b7db7f96","version":2},{"created_at":"2026-06-13T14:54:00Z","element_count":119,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}