cuozg/bash-optimize
skills/bash-optimize/SKILL.md
Use this skill to refactor an existing shell script for clarity, performance, and maintainability without changing its behavior. Use it when the user says a script is "messy," "hard to read," "slow," or asks to "clean up" or "improve" a .sh file. Covers removing unnecessary subshells, simplifying conditionals, improving variable quoting, and applying best practices. Do not use for validation-only tasks — use bash-check for that.
$ install --global
skillsauthnpx skillsauth add cuozg/oh-my-skills bash-optimizeInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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TrivyContainer and dependency vulnerability scanner
95%
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SemgrepStatic code analysis for vulnerabilities
95%
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mcp-scan (Snyk)Model Context Protocol security validation
95%
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Snyk (dep)Open source security scanning
50%
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Socket.devSupply chain security analysis
50%
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OWASP Dep-Check
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Last scanned: Apr 20, 2026, 8:37 AM16.8s1 file scanned
SKILL.md
- name:
- bash-optimize
- description:
- >
- author:
- kuozg
- version:
- 1.0
bash-optimize
Refactor an existing shell script to improve readability, reduce complexity, and apply best practices — behavior must not change.
When to Use
- A working script has grown hard to read or maintain
- Performance bottlenecks exist (e.g., unnecessary subshells, repeated calls)
- Script lacks
set -euo pipefailor proper quoting - Preparing a script for team ownership or long-term maintenance
Workflow
- Read — Read the full script and understand its intended behavior
- Identify — List specific issues: quoting gaps, useless forks, repeated code, poor naming, missing guards
- Refactor — Apply improvements: extract functions, fix quoting, add
set -euo pipefail, replace anti-patterns - Verify — Confirm the refactored script produces identical behavior for all identified execution paths
- Report — List every change made with before/after examples
Rules
- Never change observable behavior — refactor only
- Apply
set -euo pipefailat the top unless the script explicitly requires lenient error handling - Quote all variable expansions unless word-splitting is intentional
- Replace
$(cat file)with< fileredirection where appropriate - Extract repeated logic into named functions
- Prefer
[[ ]]over[ ]for conditionals in bash scripts
Output Format
Optimized script (inline replacement) plus a report listing each change, the problem it solved, and the pattern applied.
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