zig-system-calls

Use bun.sys for cross-platform file I/O and system calls in Zig.

Updated Dec 27, 2025
One-click install
npx skills add https://github.com/brendadeeznuts1111/mybundocs11 --skill zig-system-calls-brendadeeznuts1111
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: zig-system-calls
Source: https://github.com/brendadeeznuts1111/mybundocs11/tree/main/bun-docs-repo/.claude/skills/zig-system-calls
Command: npx skills add https://github.com/brendadeeznuts1111/mybundocs11 --skill zig-system-calls-brendadeeznuts1111

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Guides Zig developers on using bun.sys for cross-platform system calls and robust file I/O, replacing std.fs or std.posix where appropriate.

Core Features & Use Cases

  • bun.sys.File wrapper for common file operations (open, read, write, stat, getEndPos, reader/writer)
  • Detailed Maybe(T) error handling patterns for robust Zig code
  • Low-level bun.sys functions for opening, reading, writing, and directory operations
  • Directory iteration with bun.iterateDir and Bun's error handling
  • Cross-platform considerations and best practices for resource management

Quick Start

Install Zig and Bun, create a Zig module, import bun.sys, and implement a simple example that opens a file and writes data using bun.sys.File.

Frequently Asked Questions about zig-system-calls

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I use bun.sys for cross-platform file I/O in Zig instead of std.fs?

Use the bun.sys.File wrapper for cross-platform file I/O in Zig to perform open, read, write, and stat operations. It replaces std.fs or std.posix by providing low-level system calls with consistent behavior across supported platforms.

What is the best way to handle errors with bun.sys system calls in Zig?

The best way to handle errors with bun.sys system calls is using the Maybe(T) pattern. This approach ensures robust error propagation and resource management in Zig code by explicitly handling potential failure states from low-level file and directory operations.

Can I iterate directories using bun.sys instead of std.posix in Zig?

Yes, you can iterate directories using bun.iterateDir. This bun.sys function provides low-level directory iteration capabilities with built-in error handling, replacing standard std.posix methods for cross-platform directory traversal in Zig.

When should I use bun.sys over std.posix for system calls in Zig?

Use bun.sys over std.posix when you need cross-platform system calls within Bun-native Zig projects. It is particularly appropriate for replacing standard library file operations when targeting Bun's runtime environment and requiring robust error handling.

How do I open and write to a file using bun.sys.File in a Zig module?

To open and write to a file using bun.sys.File in a Zig module, import bun.sys and instantiate the File wrapper. Use its integrated methods for file opening and data writing, applying Maybe(T) for error propagation and resource management.