{"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-vofk1ejj","versions":[{"created_at":"2026-06-11T01:39:34Z","element_count":74,"note":"5軸GA polish 45->97 by M5 (autonomous)","saved_by":"mcp","sha256":"0a2837496db13a9885bd1ab760cab908843de4b8ef9796e564c121a141828f84","version":10},{"created_at":"2026-06-10T23:15:10Z","element_count":46,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"2969f5bb90383854ac39624a6ab287709c4037c190b60c319d777f3c37b6cf82","version":2}]}