bash-defensive-patterns

1# Bash Defensive Patterns
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3Comprehensive guidance for writing production-ready Bash scripts using defensive programming techniques, error handling, and safety best practices to prevent common pitfalls and ensure reliability.
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5## Use this skill when
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7- Writing production automation scripts
8- Building CI/CD pipeline scripts
9- Creating system administration utilities
10- Developing error-resilient deployment automation
11- Writing scripts that must handle edge cases safely
12- Building maintainable shell script libraries
13- Implementing comprehensive logging and monitoring
14- Creating scripts that must work across different platforms
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16## Do not use this skill when
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18- You need a single ad-hoc shell command, not a script
19- The target environment requires strict POSIX sh only
20- The task is unrelated to shell scripting or automation
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22## Instructions
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241. Confirm the target shell, OS, and execution environment.
252. Enable strict mode and safe defaults from the start.
263. Validate inputs, quote variables, and handle files safely.
274. Add logging, error traps, and basic tests.
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29## Safety
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31- Avoid destructive commands without confirmation or dry-run flags.
32- Do not run scripts as root unless strictly required.
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34Refer to `resources/implementation-playbook.md` for detailed patterns, checklists, and templates.
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36## Resources
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38- `resources/implementation-playbook.md` for detailed patterns, checklists, and templates.