0128-bash-defensive-patterns

What problem does it solve?

It prevents common Bash failures—silent error masking, unsafe variable handling, brittle parsing, and unmanaged cleanup—so your production scripts behave reliably under real-world edge cases.

Core Features & Use Cases

• Strict mode foundations: Use set -Eeuo pipefail to fail fast on errors, unset variables, and broken pipelines.
• Error trapping and cleanup: Add trap handlers for ERR and EXIT to log failures and reliably remove temporary resources.
• Defensive safety patterns: Apply quoting discipline, safe arrays/read loops, robust argument parsing, structured logging, signal-aware orchestration, and atomic/idem-potent file operations.

Use Case: Build a CI/CD helper script that moves artifacts, validates inputs, logs meaningful status, and safely cleans up even when jobs are interrupted or commands fail mid-run.

Quick Start

Use the 0128-bash-defensive-patterns skill to harden your deployment Bash script by enabling strict mode, validating inputs, and adding traps for error logging and temporary file cleanup.