{"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-staplehurstlodgehous-edyjoux0","versions":[{"created_at":"2026-06-11T04:11:10Z","element_count":84,"note":"5軸GA polish 44->94 by M5 (autonomous)","saved_by":"mcp","sha256":"7ec1aed575e40b1c1c571d4fad500da4c4823988ed4128b60fbfc390587dbf72","version":3},{"created_at":"2026-06-11T04:02:18Z","element_count":101,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"a6fff34bb83df11eccf2207401b26178adaff462125acfa888095559ff395701","version":2}]}