Migrates ASP.NET MVC global filters and custom AuthorizeAttribute subclasses to ASP.NET Core middleware, authorization policies, and filters. Use for GlobalFilterCollection, FilterConfig, HandleErrorAttribute, IActionFilter/IExceptionFilter conversion, or overrides of AuthorizeCore, OnAuthorization, and HandleUnauthorizedRequest.
Install
npx skills add microsoft/upgrade-agent-plugins --skill migrating-mvc-filtersnpx skills add microsoft/upgrade-agent-plugins --skill migrating-mvc-filters -a claude-code -gnpx skills add microsoft/upgrade-agent-plugins --skill migrating-mvc-filters -a codex -ggemini skills install https://github.com/microsoft/upgrade-agent-plugins.git --path plugins/upgrade-agent/upgrade/dotnet/skills/lazy/web/mvc/migrating-mvc-filtersgh skill install microsoft/upgrade-agent-plugins migrating-mvc-filtersgit clone --depth 1 https://github.com/microsoft/upgrade-agent-plugins /tmp/microsoft__upgrade-agent-plugins
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/microsoft__upgrade-agent-plugins/plugins/upgrade-agent/upgrade/dotnet/skills/lazy/web/mvc/migrating-mvc-filters ~/.claude/skills/migrating-mvc-filters # Claude Code
cp -R /tmp/microsoft__upgrade-agent-plugins/plugins/upgrade-agent/upgrade/dotnet/skills/lazy/web/mvc/migrating-mvc-filters ~/.agents/skills/migrating-mvc-filters # Codex, Cursor, Gemini CLI, Copilot, OpenCode