Migrate a JavaScript or TypeScript project from one framework to another while preserving behavior, integrations, build workflows, and validation. Covers application-framework migrations (for example Gatsby to Astro, Create React App to Vite) and tooling/test-framework migrations (for example Karma/Jasmine to Vitest).
Install
npx skills add microsoft/upgrade-agent-plugins --skill jsts-framework-migrationnpx skills add microsoft/upgrade-agent-plugins --skill jsts-framework-migration -a claude-code -gnpx skills add microsoft/upgrade-agent-plugins --skill jsts-framework-migration -a codex -ggemini skills install https://github.com/microsoft/upgrade-agent-plugins.git --path plugins/upgrade-agent/upgrade/typescript/skills/jsts-framework-migrationgh skill install microsoft/upgrade-agent-plugins jsts-framework-migrationgit 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/typescript/skills/jsts-framework-migration ~/.claude/skills/jsts-framework-migration # Claude Code
cp -R /tmp/microsoft__upgrade-agent-plugins/plugins/upgrade-agent/upgrade/typescript/skills/jsts-framework-migration ~/.agents/skills/jsts-framework-migration # Codex, Cursor, Gemini CLI, Copilot, OpenCode