Official Muse Code cookbook: four built-in playbooks load only on the turn you invoke them. /plan grounds a decision-complete plan and stops for approval; /grilling and /grill-with-docs pressure-test designs (optionally writing ADRs); /taste strips AI-slop UI defaults. Explicit-invocation only—won’t auto-plan ordinary implement requests.
Meta’s Muse Code co-trained agent (with Muse Spark) fans work out automatically: parent spawns write-capable children, each in its own git worktree so parallel edits never collide; background observer agents stay live for memory/skill/goal/verification. Fully auditable event log; workers + reviewers by default. Install: curl -fsSL https://dev.meta.ai/install.sh | bash.
Meta’s official macOS cookbook ships metacua—a hackable CLI where Muse Spark captures the screen, calls computer tools with normalized 0–1000 coordinates, and executes native mouse/keyboard events until `computer.stop`. Distinct from community Muse Jailbreak (Chrome tunnel): this is Model API + local GUI loop. Warning: real Mac control; prefer a VM/dedicated user; leave `--allow-bash` off unless isolated.