Build Express.js routers and middleware with request validation, async error handling, and clear application structure.
Install
npx skills add alivirgo/Major-AI-Skills --skill expressnpx skills add alivirgo/Major-AI-Skills --skill express -a claude-code -gnpx skills add alivirgo/Major-AI-Skills --skill express -a codex -ggemini skills install https://github.com/alivirgo/Major-AI-Skills.git --path skills/expressgh skill install alivirgo/Major-AI-Skills expressgit clone --depth 1 https://github.com/alivirgo/Major-AI-Skills /tmp/alivirgo__Major-AI-Skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/alivirgo__Major-AI-Skills/skills/express ~/.claude/skills/express # Claude Code
cp -R /tmp/alivirgo__Major-AI-Skills/skills/express ~/.agents/skills/express # Codex, Cursor, Gemini CLI, Copilot, OpenCode