Meta Ships Muse Code Beta — a Terminal Coding Agent on Muse Spark 1.2 With Persistent Background Sub-Agents in Isolated Worktrees
Meta AI Research (surfaced via r/singularity, 221 upvotes / 59 comments)·high signal
Meta Superintelligence Labs released Muse Code in beta on August 5 alongside Muse Spark 1.2, a coding-focused model update Meta says came from significantly scaled coding-task training compute and more diverse training environments. Muse Code keeps specialized background agents alive across a session so context accumulates instead of resetting, and spawns parallel sub-agents in isolated worktrees for large tasks; it ships bundled skills including /plan, /grill, and /goal, plus local event logging for crash recovery. Meta benchmarks against Terminal-Bench 2.1 and DeepSWE 1.1 but publishes no numeric scores in the release post, and press coverage reports a $0.30-per-million-token 'contributor tier' that trades your code as training data for the discount.