cross-platform-compatibility
Handle cross-platform compatibility including file paths, environment detection, platform-specific dependencies, and testing across Windows, macOS, and Linux. Use when dealing with platform-specific code or OS compatibility.
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/aj-geddes/useful-ai-prompts --skill cross-platform-compatibility- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads cross-platform-compatibility automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Cross-Platform Compatibility
Table of Contents
Overview
Comprehensive guide to writing code that works seamlessly across Windows, macOS, and Linux. Covers file path handling, environment detection, platform-specific features, and testing strategies.
When to Use
- Building applications for multiple operating systems
- Handling file system operations
- Managing platform-specific dependencies
- Detecting operating system and architecture
- Working with environment variables
- Building cross-platform CLI tools
- Dealing with line endings and character encodings
- Managing platform-specific build processes
Quick Start
Minimal working example:
// ❌ BAD: Hardcoded paths with platform-specific separators
const configPath = "C:\\Users\\user\\config.json"; // Windows only
const dataPath = "/home/user/data.txt"; // Unix only
// ✅ GOOD: Use path module
import path from "path";
import os from "os";
// Platform-independent path construction
const configPath = path.join(os.homedir(), "config", "app.json");
const dataPath = path.join(process.cwd(), "data", "users.txt");
// Resolve relative paths
const absolutePath = path.resolve("./config/settings.json");
// Get path components
const dirname = path.dirname("/path/to/file.txt"); // '/path/to'
const basename = path.basename("/path/to/file.txt"); // 'file.txt'
const extname = path.extname("/path/to/file.txt"); // '.txt'
// Normalize paths (handle .. and .)
const normalized = path.normalize("/path/to/../file.txt"); // '/path/file.txt'
Reference Guides
Detailed implementations in the references/ directory:
| Guide | Contents |
|---|---|
| File Path Handling | File Path Handling |
| Platform Detection | Platform Detection |
| Line Endings | Line Endings |
| Environment Variables | Environment Variables |
| Shell Commands | Shell Commands |
| File Permissions | File Permissions |
| Process Management | Process Management |
| Platform-Specific Dependencies | Platform-Specific Dependencies |
| Testing Across Platforms | Testing Across Platforms |
| Character Encoding | Character Encoding |
| Build Configuration | Build Configuration |
Best Practices
✅ DO
- Use path.join() or path.resolve() for paths
- Use os.EOL for line endings
- Detect platform at runtime when needed
- Test on all target platforms
- Use optionalDependencies for platform-specific modules
- Handle file permissions gracefully
- Use shell escaping for user input
- Normalize line endings in text files
- Use UTF-8 encoding by default
- Document platform-specific behavior
- Provide fallbacks for platform-specific features
- Use CI/CD to test on multiple platforms
❌ DON'T
- Hardcode file paths with backslashes or forward slashes
- Assume Unix-only features (signals, permissions, symlinks)
- Ignore Windows-specific quirks (drive letters, UNC paths)
- Use platform-specific commands without fallbacks
- Assume case-sensitive file systems
- Forget about different line endings
- Use platform-specific APIs without checking
- Hardcode environment variable access patterns
- Ignore character encoding issues
FAQ
What does the cross-platform-compatibility skill do?
Handle cross-platform compatibility including file paths, environment detection, platform-specific dependencies, and testing across Windows, macOS, and Linux. Use when dealing with platform-specific code or OS compatibility.
How do I install cross-platform-compatibility?
Run npx skills add https://github.com/aj-geddes/useful-ai-prompts --skill cross-platform-compatibility in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/cross-platform-compatibility/ (personal) or .claude/skills/cross-platform-compatibility/ (project).
Which AI agents can use cross-platform-compatibility?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is cross-platform-compatibility safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains cross-platform-compatibility?
It is published by aj-geddes in aj-geddes/useful-ai-prompts. It has 479 recorded installs.
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