How does this skill improve Bash script performance?

It utilizes the new Bash 5.3 in-shell command substitution syntax which executes commands in the current shell context, eliminating the performance cost of forking subshells.

Can I perform decimal math without external tools like 'bc'?

Yes, this skill leverages the Bash 5.3 'fltexpr' loadable builtin to perform floating-point arithmetic natively within the shell.

Does this skill support Windows environments?

Yes, it includes mandatory guidelines for using backslashes in file paths to ensure tool compatibility with Windows-based file operations.

How does this skill handle repository documentation?

It follows a strict documentation policy that prioritizes updating existing README files and avoids creating new markdown files unless specifically requested by the user.

Is it safe to use these features on older systems?

The skill provides fallback patterns and feature detection logic to ensure scripts remain functional even on older versions of Bash while utilizing 5.3 features where available.

Bash 5.3 Modern Patterns

Name: Bash 5.3 Modern Patterns
Author: JosiahSiegel

byJosiahSiegel

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Developer Tools

Implements high-performance Bash 5.3 features and modern shell scripting patterns for optimized system automation and developer tools.

This skill equips Claude with the latest capabilities of Bash 5.3 (released 2025), enabling the creation of efficient, subshell-free scripts that significantly reduce execution overhead. It focuses on performance optimization using new command substitution syntaxes, enhanced built-ins for sourcing and reading, and advanced features such as native floating-point arithmetic and configurable glob sorting. Additionally, it enforces critical cross-platform standards, ensuring correct Windows file path formatting and maintaining repository cleanliness through strict documentation guidelines and minimal file creation.

Key Features

01Native floating-point arithmetic support via fltexpr builtin

02Enhanced interactive scripts with programmable read completion

037 GitHub stars

04Dynamic glob sorting and reusable signal handling with BASH_TRAPSIG

05Optimized in-shell command substitution to eliminate subshell overhead

06Advanced result handling using the new REPLY variable syntax

Use Cases

01Interactive CLI tools with advanced path completion and history

02Modular shell library management using custom source paths

03High-performance log processing and data transformation loops

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add josiahsiegel/claude-plugin-marketplace bash-53-features

For use in Claude.ai and ChatGPT

Download Skill