{"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-bermondseyheightsbun-efgyjwbo","versions":[{"created_at":"2026-07-02T09:33:07Z","element_count":71,"note":"5軸GA polish 38->90 by M5 (autonomous)","saved_by":"mcp","sha256":"b42c7f2b4199e935ba3e8d5a125ef46db6f517183d20fbc0d3a2cad12f0484b1","version":3},{"created_at":"2026-07-02T09:24:45Z","element_count":101,"note":"loop3: 設計時延床 55.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"dcfd1390fa910935c968ed6b4688faa7c105794f35ccc6183df6a4a5e0ef2b7f","version":2},{"created_at":"2026-07-02T09:24:45Z","element_count":101,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}