Validate a JavaScript or TypeScript project by authoring and replaying an eval plan that can build or type-check, run tests, start the project, probe endpoints, and exercise browser flows. Use this directly or when another Modernizer skill delegates its required validation.
Install
npx skills add microsoft/upgrade-agent-plugins --skill typescript-runtime-validationnpx skills add microsoft/upgrade-agent-plugins --skill typescript-runtime-validation -a claude-code -gnpx skills add microsoft/upgrade-agent-plugins --skill typescript-runtime-validation -a codex -ggemini skills install https://github.com/microsoft/upgrade-agent-plugins.git --path plugins/upgrade-agent/upgrade/typescript/skills/typescript-runtime-validationgh skill install microsoft/upgrade-agent-plugins typescript-runtime-validationgit 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/typescript-runtime-validation ~/.claude/skills/typescript-runtime-validation # Claude Code
cp -R /tmp/microsoft__upgrade-agent-plugins/plugins/upgrade-agent/upgrade/typescript/skills/typescript-runtime-validation ~/.agents/skills/typescript-runtime-validation # Codex, Cursor, Gemini CLI, Copilot, OpenCode