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Meta's Muse Code Gives Each Child Agent Its Own Git Worktree to Prevent Conflicts

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Meta launched Muse Code, a CLI coding agent powered by Muse Spark 1.2, in August 2026 with a parent-child multi-agent architecture. Unlike conventional single-threaded agents, Muse Code's parent agent spawns child agents that each operate in isolated git worktrees, eliminating the risk of agents overwriting each other's uncommitted changes. The system also includes a dedicated background reviewer agent that critiques code independently, and a replayable event log that allows sessions to be resumed even after a crash. This orchestration-focused design is most valuable for complex, parallel tasks such as large migrations or features requiring simultaneous backend and test changes. Meta has acknowledged that Muse Spark trails competing models on raw coding benchmarks, making the architecture itself — rather than model quality — the primary differentiator.

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Meta's Muse Code Gives Each Child Agent Its Own Git Worktree to Prevent Conflicts · ShortSingh