Is this skill suitable for cross-platform shell scripts?

Yes, it includes best practices for portable POSIX-compliant conditionals and safe path handling, ensuring scripts work reliably across different Unix-like environments.

What is idempotent script design?

Idempotent design is a pattern where a script can be run multiple times without causing unintended side effects, checking for existing states (like directories or configs) before taking action.

How does this skill improve CI/CD pipelines?

It provides patterns for robust automation, ensuring scripts fail fast and clean up resources properly, which prevents partial deployments or corrupted states in automated environments.

What is included in Bash Strict Mode?

Bash Strict Mode typically uses 'set -Eeuo pipefail' to ensure scripts exit immediately on errors, undefined variables, or failures within a pipeline, preventing silent errors.

Bash Defensive Patterns

Name: Bash Defensive Patterns
Author: HermeticOrmus

byHermeticOrmus

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Deployment & DevOps

Implements production-grade defensive Bash programming techniques to ensure robust, error-resistant shell scripts and automation pipelines.

This skill empowers developers to build bulletproof shell scripts by applying industry-standard defensive patterns. It provides Claude with the expertise to implement strict error handling, secure variable management, and reliable resource cleanup, significantly reducing common shell scripting failures in CI/CD pipelines, system utilities, and deployment automation. By utilizing patterns like Bash 'Strict Mode,' signal trapping, and idempotent design, it ensures scripts are maintainable, portable across platforms, and resilient to unexpected edge cases.

Key Features

01Secure variable and array handling to prevent word splitting and globbing issues

020 GitHub stars

03Robust argument parsing and structured logging templates for better observability

04Idempotent design patterns to ensure scripts are safe for repeated execution

05Advanced error trapping and automatic cleanup routines using EXIT and ERR signals

06Strict mode enforcement for early error detection and fail-fast behavior

Use Cases

01Building reliable CI/CD pipeline scripts and deployment automation

02Developing maintainable shell script libraries for cross-platform use

03Creating system administration utilities that require high fault tolerance

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add hermeticormus/alqvimia-contador bash-defensive-patterns

For use in Claude.ai and ChatGPT

Download Skill