Muse Code Delegation

Overview

Muse Code is Meta's terminal coding agent, released August 2026 and built on Muse Spark 1.2. It runs either as an interactive TUI or as a one-shot headless command, and the headless form is what delegation uses.

The binary is muse. Meta publishes no npm or PyPI package for it: the documented install is a script served from Meta's own domain.

When To Use

• delegation-core selected muse for the task
• Repository-scale reading where Muse Spark 1.2's 1M-token context helps
• Work that should run unattended, since muse exec is designed for CI