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.
MIT Claude Code plugin hands tasks to DeepSeek, Gemini (Antigravity), Codex, OpenCode or Copilot as worker CLIs—each in an isolated git worktree with your verify command—then returns a compact verdict/patch for Claude to review; API keys stay in a local browser form.