Developer Builds Native tmux Port for Windows Using Claude Code Without Knowing C

Native tmux Implementation for Windows

A developer has built tmux-win, a native terminal multiplexer for Windows that doesn't rely on WSL or Cygwin. The project was created using Claude Code to handle the low-level Win32 API and conpty implementation, even though the developer doesn't know C programming.

Technical Implementation

The tool is built on the Win32 API and conpty (Windows Console Pseudoterminal) with these specific features:

• Vertical and horizontal splits for terminal window management
• Detaching and attaching sessions that actually persist
• Native performance with zero VM overhead

The architecture uses proper client-server design with named pipes for IPC (inter-process communication), not just a wrapper around existing tools.

How Claude Code Assisted

According to the developer, Claude Code handled several challenging aspects:

• Managed Win32 structures and process management that would have taken weeks to research manually
• Translated session and pane logic into pointers and system calls
• Helped debug conpty implementation through multiple iterations until rendering was stable

The developer notes that debugging conpty was particularly challenging but Claude helped iterate through fixes.

The project demonstrates how AI coding assistants can bridge the gap between conceptual understanding and low-level implementation, allowing developers to create system utilities in languages they don't know.