Bash Defensive Patterns

If you're tired of shell scripts that work on your machine but explode in production, this is your checklist. It walks you through strict mode setup, proper error traps, input validation, and safe file handling so your CI/CD pipelines and deployment scripts don't silently fail or nuke the wrong directory. The implementation playbook gives you actual patterns and templates, not just theory. Best for production automation where you need fault tolerance and can't afford the "it worked yesterday" debugging cycle. It won't help with one-off commands or strict POSIX sh environments, but for modern Bash scripting that needs to survive contact with reality, it covers the defensive fundamentals most people learn the hard way.