developing-complex-posix-shell-scripts skill

This skill defines guidelines for writing complex POSIX shell scripts: production utilities, reusable system tools, or scripts that require multiple flags, structured logging, or robust error handling — while remaining strictly portable.

Use developing-simple-posix-shell-scripts for ad-hoc tasks or scripts under ~50 lines without CLI scaffolding.

When to Use This Skill

• Reusable system utilities or production automation scripts targeting /bin/sh
• Scripts with multiple named flags / options
• Requires structured logging with severity levels
• Needs -h / help output
• Has cleanup logic, dependency checks, or complex control flow
• Must run portably on Alpine, BusyBox, embedded, or other minimal systems

Core Requirements

Shebang & Safety Modes