Bun as runtime, package manager, bundler, and test runner. When to choose Bun vs Node, migration notes, and Vercel support.
Install
npx skills add affaan-m/ECC --skill bun-runtimenpx skills add affaan-m/ECC --skill bun-runtime -a claude-code -gnpx skills add affaan-m/ECC --skill bun-runtime -a codex -ggemini skills install https://github.com/affaan-m/ECC.git --path .agents/skills/bun-runtimegh skill install affaan-m/ECC bun-runtimegit clone --depth 1 https://github.com/affaan-m/ECC /tmp/affaan-m__ECC
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/affaan-m__ECC/.agents/skills/bun-runtime ~/.claude/skills/bun-runtime # Claude Code
cp -R /tmp/affaan-m__ECC/.agents/skills/bun-runtime ~/.agents/skills/bun-runtime # Codex, Cursor, Gemini CLI, Copilot, OpenCode