Meta Muse Code

What is Meta Muse Code?

Muse Code is Meta's terminal coding agent, launched in beta on August 5, 2026 on Muse Spark 1.2. It keeps specialised background agents alive for a whole session so they accumulate context, delegates large jobs to subagents running in parallel inside isolated git worktrees, and appends every model call, tool run, approval, and edit to a local event log so a crash resumes where it stopped. It installs with one command on macOS and Linux. Coverage reports it left beta on August 31 with cross-session messaging, subagent workflows, an SDK preview, and monthly plans from $5.

Key features

• Persistent background subagents that keep context across a session
• Parallel subagents in isolated git worktrees
• Append-only local event log with crash resume
• One-command install on macOS and Linux
• Workflows for coordinating teams of subagents; SDK in developer preview

Best for

Read more

• Muse Code vs Claude Code vs Codex CLI — The Big Labs' Terminal Agents ComparedTool Guides · 7 min read

Related comparisons

• Meta Muse Code vs Claude CodeMuse Code is Meta's answer to Claude Code: both are terminal agents that take a task, work across a repository, and hand back a change. Claude Code runs on Anthropic's models and is the more mature product with the larger user base. Muse Code runs on Meta's Muse models and leads with persistent background subagents in isolated git worktrees and an append-only event log.