Migrates ASP.NET MVC Identity to ASP.NET Core Identity, updating IdentityDbContext, UserManager, SignInManager, authentication middleware, and OWIN cleanup. Use when upgrading ASP.NET MVC projects that use Identity authentication, migrating Identity-based login systems, or converting OWIN-based auth to ASP.NET Core middleware.
Install
npx skills add microsoft/upgrade-agent-plugins --skill migrating-aspnet-identitynpx skills add microsoft/upgrade-agent-plugins --skill migrating-aspnet-identity -a claude-code -gnpx skills add microsoft/upgrade-agent-plugins --skill migrating-aspnet-identity -a codex -ggemini skills install https://github.com/microsoft/upgrade-agent-plugins.git --path plugins/upgrade-agent/upgrade/dotnet/skills/lazy/web/mvc/migrating-aspnet-identitygh skill install microsoft/upgrade-agent-plugins migrating-aspnet-identitygit 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-aspnet-identity ~/.claude/skills/migrating-aspnet-identity # Claude Code
cp -R /tmp/microsoft__upgrade-agent-plugins/plugins/upgrade-agent/upgrade/dotnet/skills/lazy/web/mvc/migrating-aspnet-identity ~/.agents/skills/migrating-aspnet-identity # Codex, Cursor, Gemini CLI, Copilot, OpenCode