Open Source Swift Terminals

XcodeGen is a command line tool written in Swift that generates your Xcode project using your folder structure and a project spec. The project spec is a YAML or JSON file that defines your targets, configurations, schemes, custom build settings and many other options. All your source directories are automatically parsed and referenced appropriately while preserving your folder structure. Sensible defaults are used in many places, so you only need to customize what is needed. Very complex projects can also be defined using more advanced features. Generate projects on demand and remove your .xcodeproj from git, which means no more merge conflicts! Automatically generate Schemes for different environments like test and production. Share build settings across multiple targets with build setting groups. Easily copy and paste files and directories without having to edit anything in Xcode.

cmux is a Ghostty-based macOS terminal designed for developers who work with AI coding agents. It combines a terminal, browser, notifications, workspaces, panes, tabs, and a CLI into one agent-friendly environment. The project does not force a specific agent workflow, but instead provides primitives that developers can use to coordinate their own tools. Vertical tabs and workspace organization make it easier to track multiple agent sessions or coding contexts at once. Built-in notifications help users notice when long-running agents or commands need attention. cmux is best suited for macOS developers who use terminal-based AI coding tools and want a more organized, interactive control surface around them.

SwiftFormat is a code library and command-line tool for reformatting Swift code on macOS or Linux. SwiftFormat goes above and beyond what you might expect from a code formatter. In addition to adjusting white space, it can insert or remove implicit self, remove redundant parentheses, and correct many other deviations from the standard Swift idioms. Many programmers have a preferred style for formatting their code, and others seem entirely blind to the existing formatting conventions of a project. When collaborating on a project, it can be helpful to agree on a common coding style, but enforcing that manually is tedious and error-prone, and can lead to arguments if some participants take it more seriously than others. Having a tool to automatically enforce a common style eliminates those issues, and lets you focus on the behavior of the code, not its presentation.

RepoBar is a macOS menu bar application that provides a real-time dashboard for monitoring GitHub repositories without opening a browser. Built with SwiftUI and AppKit, the tool surfaces key repository signals such as CI status, pull requests, issues, releases, traffic metrics, and recent activity directly in the system menu bar. RepoBar is designed for developers managing multiple repositories simultaneously, offering glanceable insights that reduce context switching and improve workflow awareness. The application also tracks local Git repository state, helping users correlate remote repository activity with their local development environment. It includes a bundled CLI and supports configurable refresh schedules, repository pinning, and fast navigation to GitHub actions or checks. The project emphasizes speed, minimalism, and continuous visibility into development operations.

Ghostty is a modern terminal emulator designed to deliver high performance, low latency, and a refined user experience for developers. It is built with a focus on speed and efficiency, leveraging modern rendering techniques to provide smooth text display and responsive interaction. The project emphasizes simplicity while maintaining advanced capabilities expected from professional terminal tools. It integrates with modern development workflows and supports customization for user preferences. Ghostty aims to balance minimalism with power, avoiding unnecessary complexity while retaining flexibility. It is particularly suited for developers who want a fast and clean terminal environment. Overall, it represents a next-generation approach to terminal design.

Ghostty Blackhole is a Ghostty terminal shader that renders a ray-traced black hole directly inside the terminal window. It turns terminal contents into the background sky, so nearby text bends, stretches, magnifies, and disappears through the simulated gravitational lens. The shader can run in different size modes, including a Pomodoro-style timing mode, a Claude Code token mode, and a demo mode. In token mode, the black hole grows as Claude Code’s context window fills, creating a visual warning before compaction becomes necessary. The project uses a single fragment shader and live physics-inspired rendering rather than static overlays. It is useful for terminal customization, visual experimentation, and playful feedback during long AI coding sessions.