Meta launches Muse Code AI coding agent for macOS and Linux

Meta Platforms has launched a new artificial intelligence tool designed to assist software developers with complex coding projects, marking a significant expansion of its offerings in the competitive AI assistant market. The tool, called Muse Code, entered public beta on August 5, 2026, and is powered by the company's latest coding-focused model, Muse Spark 1.2.

Muse Code is a terminal-based application currently available for macOS and Linux systems. Unlike some competing tools, it does not feature a dedicated graphical interface. Instead, it operates within a developer's command-line environment, where it can be installed with a single command. The company positions Muse Code as an "agentic" tool capable of handling complete software engineering tasks across large code repositories, rather than merely suggesting individual lines of code.

According to the company, Muse Code can autonomously plan changes, write code, run commands and tests, and validate the results. A key feature is its ability to manage multiple persistent subagents that work simultaneously on different parts of a larger task, which is intended to speed up complex projects. Meta CEO Mark Zuckerberg stated in a...