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bash-expert

Write and harden Bash scripts with POSIX compatibility and safe defaults.

3|1|Updated Jan 14, 2026
Search Tags:#debugging#bash#shellcheck#scripting#shell#posix#portability
One-click install
npx skills add https://github.com/heyAyushh/stacc --skill bash-expert
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: bash-expert
Source: https://github.com/heyAyushh/stacc/tree/main/configs/skills/bash-expert
Command: npx skills add https://github.com/heyAyushh/stacc --skill bash-expert

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill helps developers write safe Bash scripts and one-liners with correct quoting, error handling, and portable behavior across macOS and Linux.

Core Features & Use Cases

  • Safe scripting: Enforces robust error handling, quoting, and portability across POSIX shells.
  • ShellCheck-guided reviews: Proposes fixes, dry-runs, and testable examples.
  • Use Case: When you need to convert requirements into reliable shell scripts that work on macOS and Linux without relying on GNU-only features.

Quick Start

Use the bash-expert skill to review a simple script and apply safe quoting, proper set -euo pipefail, and POSIX compatibility checks.

Frequently Asked Questions about bash-expert

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I write Bash scripts that work on both macOS and Linux?▼

Portable Bash scripts require strict quoting, robust shebang choices, and avoiding GNU-only features to ensure POSIX compatibility across macOS and Linux. Enforcing safe defaults like set -euo pipefail prevents unexpected failures during cross-platform shell execution.

What is the best way to fix ShellCheck errors in a shell script?▼

Fixing ShellCheck errors involves applying proposed corrections for quoting issues, pipeline correctness, and safe defaults. Reviewing shell scripts to ensure proper error handling and enforcing set -euo pipefail hardens overall script execution against silent failures.

Why does my Bash one-liner fail with unquoted variables?▼

Bash one-liners fail with unquoted variables due to word splitting and globbing issues. Proper quoting is required to handle spaces and special characters safely, preventing unexpected command failures and ensuring robust shell behavior.

Do I need to use set -euo pipefail for every Bash script?▼

Using set -euo pipefail is a safe default for robust Bash scripts, enforcing error handling and pipeline correctness. It stops execution on errors, undefined variables, and pipe failures, which is essential for hardening shell scripting workflows.

Can I use GNU-only Bash features in a POSIX-compatible shell script?▼

You should avoid GNU-only features in POSIX-compatible shell scripts to ensure portability across macOS and Linux. Relying on standard POSIX features prevents compatibility issues and ensures your shell scripts execute reliably in different environments.

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