Calyx: Native macOS Terminal with AI & Session Management

Calyx is a native macOS terminal application designed to enhance developer productivity through deep integration with AI agents and advanced session management. It targets power users and engineers seeking a modern, customizable, and powerful command-line environment on macOS, offering features like persistent sessions, browser scripting, and AI-driven code assistance.

How It Works

Built upon the libghostty terminal engine, Calyx leverages Metal for GPU-accelerated rendering and a "Liquid Glass UI" adhering to macOS's Tahoe design language. Its core innovation lies in its robust AI agent integration, enabling inter-pane communication via an MCP server and exposing language server protocol (LSP) features to CLI agents. This architecture facilitates features like agent-driven code analysis, automated tasks, and programmatic browser control.

Quick Start & Requirements

Installation is straightforward via Homebrew (brew tap yuuichieguchi/calyx && brew install --cask calyx) or manual download from releases. Building from source requires macOS 26+ (Tahoe), Xcode 26+, Zig, and XcodeGen. Official documentation is available at help.getcalyx.app.

Highlighted Details

• AI Agent & LSP Integration: Facilitates AI agent communication (Claude Code, Codex, etc.) via MCP server and provides LSP proxy for language server features (hover, definition, diagnostics) to CLI agents.
• Persistent & Remote Sessions: Offers daemon-backed sessions that survive application quits/crashes, with auto-save/restore and support for persistent SSH sessions.
• Browser Scripting: Includes 25 CLI commands for programmatic browser automation (e.g., calyx browser click, calyx browser fill, calyx browser eval).
• Modern UI & UX: Features Liquid Glass UI with customizable themes, tab groups, split panes, a command palette, and a compose overlay for multiline input.
• Scrollback Search & Drag/Drop: Enables searching terminal scrollback and dropping files/URLs directly into the terminal.

Maintenance & Community

Information regarding maintainers, community channels (e.g., Discord, Slack), or sponsorships was not present in the provided project description.

Licensing & Compatibility

Licensed under the MIT License, which is permissive for commercial use and integration into closed-source projects.

Limitations & Caveats

Cursor click-to-move functionality may exhibit offset behavior on full-width text lines. Certain Ghostty configuration options (e.g., background opacity, blur) are managed by Calyx for its UI and cannot be independently configured via the Ghostty config file.