coterm is built on Ghostty

Coterm is not a fork of Ghostty. It embeds libghostty, the library at the core of the Ghostty terminal, for GPU-accelerated rendering, the same way an app uses WebKit for web views. Ghostty is a standalone terminal; coterm is a different application built on top of its rendering engine.

What coterm adds on top

libghostty gives coterm a fast, accurate terminal. coterm builds an application around it for multitasking, organization, and programmability:

• Workspaces in a vertical sidebar, each showing its git branch, working directory, ports, and the latest line of agent output.
• Notification rings when a pane needs your attention, plus an iOS companion app to check on your terminals from your phone.
• Vertical tabs and split panes that scale to dozens of sessions.
• A CLI and Unix socket API to script workspaces, panes, input, and an in-app browser.

Why libghostty

Reusing libghostty means coterm inherits Ghostty's rendering quality and performance instead of reimplementing a terminal, and stays focused on the workspace, organization, and automation layer that sits above the terminal grid. Your existing ~/.config/ghostty/config for themes, fonts, and colors is read directly.