Model TypeScript data with strict types, narrowing, and generics; configure tsconfig and migrate JavaScript while checking untyped boundaries.
Install
npx skills add alivirgo/Major-AI-Skills --skill typescriptnpx skills add alivirgo/Major-AI-Skills --skill typescript -a claude-code -gnpx skills add alivirgo/Major-AI-Skills --skill typescript -a codex -ggemini skills install https://github.com/alivirgo/Major-AI-Skills.git --path skills/typescriptgh skill install alivirgo/Major-AI-Skills typescriptgit 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/typescript ~/.claude/skills/typescript # Claude Code
cp -R /tmp/alivirgo__Major-AI-Skills/skills/typescript ~/.agents/skills/typescript # Codex, Cursor, Gemini CLI, Copilot, OpenCode