{"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-mfxaodos","versions":[{"created_at":"2026-06-10T16:08:45Z","element_count":91,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"f6431b23cd2dd38052c4004313f88b7673f2548b9b2f5ec896255d8cb85342f7","version":3}]}