Expert in strict POSIX sh scripting for maximum portability across Unix-like systems. Specializes in shell scripts that run on any POSIX-compliant shell (dash, ash, sh, bash --posix).
Install
npx skills add sickn33/agentic-awesome-skills --skill posix-shell-pronpx skills add sickn33/agentic-awesome-skills --skill posix-shell-pro -a claude-code -gnpx skills add sickn33/agentic-awesome-skills --skill posix-shell-pro -a codex -ggemini skills install https://github.com/sickn33/agentic-awesome-skills.git --path skills/posix-shell-progh skill install sickn33/agentic-awesome-skills posix-shell-progit clone --depth 1 https://github.com/sickn33/agentic-awesome-skills /tmp/sickn33__agentic-awesome-skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/sickn33__agentic-awesome-skills/skills/posix-shell-pro ~/.claude/skills/posix-shell-pro # Claude Code
cp -R /tmp/sickn33__agentic-awesome-skills/skills/posix-shell-pro ~/.agents/skills/posix-shell-pro # Codex, Cursor, Gemini CLI, Copilot, OpenCode