Meta wants to get inside your terminal with its new coding agent

Muse Code showcases Muse Spark's fresh software engineering chops

To demonstrate the capabilities of its next-generation Muse Spark model, Meta has released a terminal coding agent called Muse Code that it thinks can help developers to tidy up their software projects.Meta co-trained Muse Code on version 1.2 of its Muse Spark model, also released this week and now apparently boasting improved code generation smarts.Developers can think of this beta release as the equivalent to OpenAI Codex or Anthropic’s Claude Code, two other LLM-based service offerings tweaked for the modern coder. Meta designed its new agent to be handy at planning changes to a codebase, writing the code and validating the results.

Currently, Meta has Muse Spark locked away as a proprietary, closed-weight model hosted in the cloud, an approach its rivals also embrace but which departs from the open-weight approach Meta previously implemented with its Llama models.

But Meta CEO Mark Zuckerberg did not rule out opening up Muse Spark in the future. “I'll have more to share on that soon,” he replied to a question posed on X about Muse Spark being open source. An agent orchestratorMuse Code is best described as an agent orchestrator that runs on your command line. As Zuck noted in a series of X messages, when a developer starts a task, Muse Code fires up background agents to maintain a context file that other sub-agents doing the work can consult should they lose their way. The tool logs every action before execution, so no work is lost. Multiple agents can work in parallel on the task using their own isolated work trees. “Your working copy is never touched,” Zuck wrote.In one test, the agent platform simultaneously built six features for a single game, with no collisions among the agents, Zuckerberg enthused. “TBH it's a good harness,” boasted Hongyu Ren, a researcher for Meta’s Superintelligence Labs, on X. Remedial coding