Master defensive Bash programming techniques for production-grade scripts. Use when writing robust shell scripts, CI/CD pipelines, or system utilities requiring fault tolerance and safety.

Bash Defensive Patterns Comprehensive guidance for writing production ready Bash scripts using defensive programming techniques, error handling, and safety best practices to prevent common pitfalls and ensure reliability. Use this skill when Writing production automation scripts Building CI/CD pipeline scripts Creating system administration utilities Developing error resilient deployment automation Writing scripts that must handle edge cases safely Building maintainable shell script libraries Implementing comprehensive logging and monitoring Creating scripts that must work across different platforms Do not use this skill when You need a single ad hoc shell command, not a script The target environment requires strict POSIX sh only The task is unrelated to shell scripting or automation Instructions 1. Confirm the target shell, OS, and execution environment. 2. Enable strict mode and safe defaults from the start. 3. Validate inputs, quote variables, and handle files safely. 4. Add logging, error traps, and basic tests. Safety Avoid destructive commands without confirmation or dry run flags. Do not run scripts as root unless strictly required. Refer to resources/implementation playbook.md for detailed patterns, checklists, and templates. Resources resources/implementation playbook.md for detailed patterns, checklists, and templates. Limitations Use this skill only when the task clearly matches the scope described above. Do not treat the output as a substitute for environment specific validation, testing, or expert review. Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.

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