shellcheck

name	shellcheck
description	Use this skill when the user wants to lint shell scripts, check bash/sh scripts for errors, find bugs in shell code, or improve script quality.

shellcheck Plugin

Static analysis tool for shell scripts (bash/sh).

Commands

Check

• shellcheck check run — Lint a shell script
• shellcheck check json — Lint script and output JSON

Usage Examples

• "Check this shell script for errors"
• "Lint my bash script"
• "Find bugs in deploy.sh"
• "Check script and output as JSON"

Installation

brew install shellcheck

Examples

# Basic check
shellcheck myscript.sh

# JSON output
shellcheck --format json myscript.sh

# Set minimum severity
shellcheck --severity=warning myscript.sh

# Check multiple files
shellcheck *.sh

# Source files
shellcheck --source-path=SRC myscript.sh

Key Features

• 300+ built-in checks
• JSON, CheckStyle, GCC output formats
• CI integration
• Editor integrations (VSCode, Vim, Emacs)