Migrates ASP.NET Core projects from the obsolete Microsoft.AspNetCore.SpaServices.Extensions to Microsoft.AspNetCore.SpaProxy for Angular and React SPAs. Use ONLY when Microsoft.AspNetCore.SpaServices.Extensions has been flagged as obsolete or deprecated and must be replaced — not for version-bump scenarios where SpaServices.Extensions is still supported.
Install
npx skills add microsoft/upgrade-agent-plugins --skill migrating-spa-services-to-spa-proxynpx skills add microsoft/upgrade-agent-plugins --skill migrating-spa-services-to-spa-proxy -a claude-code -gnpx skills add microsoft/upgrade-agent-plugins --skill migrating-spa-services-to-spa-proxy -a codex -ggemini skills install https://github.com/microsoft/upgrade-agent-plugins.git --path plugins/upgrade-agent/upgrade/dotnet/skills/lazy/libraries/migrating-spa-services-to-spa-proxygh skill install microsoft/upgrade-agent-plugins migrating-spa-services-to-spa-proxygit 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-spa-services-to-spa-proxy ~/.claude/skills/migrating-spa-services-to-spa-proxy # Claude Code
cp -R /tmp/microsoft__upgrade-agent-plugins/plugins/upgrade-agent/upgrade/dotnet/skills/lazy/libraries/migrating-spa-services-to-spa-proxy ~/.agents/skills/migrating-spa-services-to-spa-proxy # Codex, Cursor, Gemini CLI, Copilot, OpenCode