What is Bash strict mode?

Bash strict mode uses settings like 'set -Eeuo pipefail' to ensure scripts exit immediately when a command fails, a variable is unset, or a pipe sequence breaks.

Is this applicable to both Bash and POSIX shell?

While focused on Bash-specific features for maximum safety (like [[ ]] and arrays), it also includes guidance on POSIX-compliant alternatives for portability.

Can this skill help with temporary file management?

Yes, it provides patterns for using mktemp and EXIT traps to ensure temporary files are securely created and always cleaned up, even on script failure.

Does it support dry-run functionality?

Yes, it includes patterns for implementing a DRY_RUN flag, allowing you to preview destructive operations like file deletions or cloud API calls before executing them.

How does this skill improve CI/CD pipelines?

It implements fault-tolerant patterns and comprehensive logging, ensuring pipelines fail loudly and clearly rather than proceeding with corrupted states.

Bash Defensive Patterns

Name: Bash Defensive Patterns
Author: Microck

byMicrock

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Deployment & DevOps

Implements robust, production-ready shell scripting techniques to ensure reliability and fault tolerance in automation tasks.

This skill equips Claude with a comprehensive framework for writing high-quality Bash scripts that are resilient to common execution pitfalls. It covers essential defensive programming practices such as strict mode enforcement, sophisticated error trapping, and safe variable handling. Whether building CI/CD pipelines, system utilities, or complex deployment automation, this skill ensures that shell scripts are maintainable, portable, and capable of handling edge cases without silent failures.

Key Features

01Strict mode enforcement using set -Eeuo pipefail for early error detection

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03Robust command-line argument parsing with support for long and short flags

04Advanced error trapping and automated resource cleanup routines

05Idempotent script design patterns to ensure safe re-execution

06Structured logging and dry-run capabilities for safe testing and observability

Use Cases

01Developing system administration utilities that require safe file and directory operations

02Hardening CI/CD pipeline scripts to prevent silent failures during build or deployment

03Creating maintainable shell libraries for cross-platform infrastructure automation

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add microck/ordinary-claude-skills bash-defensive-patterns

For use in Claude.ai and ChatGPT

Download Skill