Run focused checks while implementing and one final static, browser, and persistence validation sequence before calling a Universal App complete.
Install
npx skills add microsoft/rayfin --skill app-validationnpx skills add microsoft/rayfin --skill app-validation -a claude-code -gnpx skills add microsoft/rayfin --skill app-validation -a codex -ggemini skills install https://github.com/microsoft/rayfin.git --path samples/universal-app/template/.agents/skills/app-validationgh skill install microsoft/rayfin app-validationgit clone --depth 1 https://github.com/microsoft/rayfin /tmp/microsoft__rayfin
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/microsoft__rayfin/samples/universal-app/template/.agents/skills/app-validation ~/.claude/skills/app-validation # Claude Code
cp -R /tmp/microsoft__rayfin/samples/universal-app/template/.agents/skills/app-validation ~/.agents/skills/app-validation # Codex, Cursor, Gemini CLI, Copilot, OpenCode