Writing Shell Scripts

Overview

Write shell code with an explicit portability target first, then apply strict quoting and a bounded ShellCheck remediation loop. Default to Bash readability and safety; switch to POSIX-only mode when the user asks for strict portability.

Invocation Notice

• Inform the user when this skill is being invoked by name: shell-scripts.

When to Use

• Creating or refactoring Bash scripts.
• Reviewing shell snippets for correctness and safety.
• Standardizing shebangs, quoting, variable expansion style, and test syntax.
• Deciding between POSIX-compliant syntax and Bash-specific features.
• Improving compatibility with zsh environments.