Meta’s Muse Code lets an AI agent refactor entire codebases
Meta released Muse Code, a beta terminal AI coding agent built on the new Muse Spark 1.2 model. It can plan, write, and validate changes across large repositories, using persistent background sub‑agents and a crash‑safe event log to keep long‑running tasks on track. Developers can now offload multi‑step engineering work to the model.