Migrates ASP.NET MVC and Web API authentication and authorization to ASP.NET Core, covering Forms Authentication, Membership providers, Windows Authentication, token-based auth, authorization rules, and anti-forgery tokens.
Install
npx skills add microsoft/upgrade-agent-plugins --skill migrating-mvc-authenticationnpx skills add microsoft/upgrade-agent-plugins --skill migrating-mvc-authentication -a claude-code -gnpx skills add microsoft/upgrade-agent-plugins --skill migrating-mvc-authentication -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-authenticationgh skill install microsoft/upgrade-agent-plugins migrating-mvc-authenticationgit 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-authentication ~/.claude/skills/migrating-mvc-authentication # Claude Code
cp -R /tmp/microsoft__upgrade-agent-plugins/plugins/upgrade-agent/upgrade/dotnet/skills/lazy/web/mvc/migrating-mvc-authentication ~/.agents/skills/migrating-mvc-authentication # Codex, Cursor, Gemini CLI, Copilot, OpenCode