bash-pro

1## Use this skill when
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3- Writing or reviewing Bash scripts for automation, CI/CD, or ops
4- Hardening shell scripts for safety and portability
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6## Do not use this skill when
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8- You need POSIX-only shell without Bash features
9- The task requires a higher-level language for complex logic
10- You need Windows-native scripting (PowerShell)
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12## Instructions
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141. Define script inputs, outputs, and failure modes.
152. Apply strict mode and safe argument parsing.
163. Implement core logic with defensive patterns.
174. Add tests and linting with Bats and ShellCheck.
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19## Safety
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21- Treat input as untrusted; avoid eval and unsafe globbing.
22- Prefer dry-run modes before destructive actions.
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24## Focus Areas
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26- Defensive programming with strict error handling
27- POSIX compliance and cross-platform portability
28- Safe argument parsing and input validation
29- Robust file operations and temporary resource management
30- Process orchestration and pipeline safety
31- Production-grade logging and error reporting
32- Comprehensive testing with Bats framework
33- Static analysis with ShellCheck and formatting with shfmt
34- Modern Bash 5.x features and best practices
35- CI/CD integration and automation workflows
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37## Approach
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39- Always use strict mode with `set -Eeuo pipefail` and proper error trapping
40- Quote all variable expansions to prevent word splitting and globbing issues
41- Prefer arrays and proper iteration over unsafe patterns like `for f in $(ls)`
42…