Migrates a custom Katana/OWIN authentication handler to an ASP.NET Core authentication scheme. Use when an application defines its own scheme by deriving from the OWIN AuthenticationHandler base class in Microsoft.Owin.Security.Infrastructure — usually with its own AuthenticationMiddleware subclass and IAppBuilder extension — and the equivalent ASP.NET Core handler must be registered with…
Install
npx skills add microsoft/upgrade-agent-plugins --skill migrating-owin-authentication-handler-to-corenpx skills add microsoft/upgrade-agent-plugins --skill migrating-owin-authentication-handler-to-core -a claude-code -gnpx skills add microsoft/upgrade-agent-plugins --skill migrating-owin-authentication-handler-to-core -a codex -ggemini skills install https://github.com/microsoft/upgrade-agent-plugins.git --path plugins/upgrade-agent/upgrade/dotnet/skills/lazy/libraries/migrating-owin-authentication-handler-to-coregh skill install microsoft/upgrade-agent-plugins migrating-owin-authentication-handler-to-coregit 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/libraries/migrating-owin-authentication-handler-to-core ~/.claude/skills/migrating-owin-authentication-handler-to-core # Claude Code
cp -R /tmp/microsoft__upgrade-agent-plugins/plugins/upgrade-agent/upgrade/dotnet/skills/lazy/libraries/migrating-owin-authentication-handler-to-core ~/.agents/skills/migrating-owin-authentication-handler-to-core # Codex, Cursor, Gemini CLI, Copilot, OpenCode