Why does the skill emphasize absolute paths?

Using absolute paths (e.g., /usr/bin/curl) is a 2025 best practice that prevents PATH hijacking, where an attacker places a malicious binary in a local directory to intercept commands.

How does this skill prevent command injection in Bash?

It enforces the use of array-based command execution and the '--' separator, ensuring that user-provided inputs are treated as literal strings rather than executable code.

How are secrets handled by this security skill?

It provides patterns to avoid hardcoding secrets, recommending secure file reads from protected directories or integration with cloud-based secret managers like AWS Secrets Manager.

Does this skill support Windows file systems?

Yes. It includes a mandatory requirement to use backslashes for all Windows file paths, ensuring compatibility with native tools while preventing path-related errors.

Security-First Bash 2025

Name: Security-First Bash 2025
Author: JosiahSiegel

byJosiahSiegel

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Security & Testing

Implements zero-trust security patterns and mandatory validation protocols for robust, enterprise-grade Bash scripting.

The Security-First Bash 2025 skill equips Claude with the specialized logic required to author shell scripts that withstand modern exploit vectors. It enforces a zero-trust architecture by mandating input validation, preventing command injection through safe array usage, and mitigating path traversal via strict sanitization. Designed for 2025 security standards, this skill also handles complex cross-platform requirements like Windows backslash formatting and provides best practices for secrets management and privilege escalation, ensuring your automation is both professional and production-ready.

Key Features

01Strict Windows pathing compliance using backslash normalization

02Mandatory regex-based input validation and length checking

037 GitHub stars

04Secure temporary file management with automatic cleanup handlers

05Environment sanitization and absolute path enforcement to prevent hijacking

06Advanced command injection prevention using safe array execution

Use Cases

01Refactoring legacy shell scripts to meet modern security compliance standards

02Hardening automation scripts for enterprise CI/CD and DevOps pipelines

03Building secure system utilities that manage sensitive credentials or high-privilege tasks

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add josiahsiegel/claude-plugin-marketplace security-first-2025

For use in Claude.ai and ChatGPT

Download Skill