Migrates ASP.NET Framework Web.config configuration to ASP.NET Core appsettings.json and IConfiguration/IOptions patterns. Covers appSettings, connectionStrings, custom config sections, environment-specific transforms, and encrypted config.
Install
npx skills add microsoft/upgrade-agent-plugins --skill migrating-mvc-configurationnpx skills add microsoft/upgrade-agent-plugins --skill migrating-mvc-configuration -a claude-code -gnpx skills add microsoft/upgrade-agent-plugins --skill migrating-mvc-configuration -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-configurationgh skill install microsoft/upgrade-agent-plugins migrating-mvc-configurationgit 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-configuration ~/.claude/skills/migrating-mvc-configuration # Claude Code
cp -R /tmp/microsoft__upgrade-agent-plugins/plugins/upgrade-agent/upgrade/dotnet/skills/lazy/web/mvc/migrating-mvc-configuration ~/.agents/skills/migrating-mvc-configuration # Codex, Cursor, Gemini CLI, Copilot, OpenCode