Muse Code and Muse Spark 1.2

Meta has released Muse Code (beta), a terminal coding agent powered by the new Muse Spark 1.2 model, designed to handle complex software engineering tasks across large repositories by planning changes, writing code, and validating results with minimal user intervention. Muse Code operates using a main agent coordinated with persistent background agents and maintains a local event log for crash recovery and long-running task reliability. Muse Spark 1.2 represents a significant upgrade focused on code generation, debugging, and codebase understanding, with improvements achieved through scaled training compute and co-training with Muse Code.