Desktop (Electron) sandbox instances

make dev + make start (Electron) uses MUX_ROOT for persisted state (config, sessions, worktrees, etc.). Running multiple Electron instances against the same mux root is noisy and risky during development.

This skill documents the repo workflow for starting multiple desktop dev instances in parallel (including from different git worktrees) by giving each instance its own temporary MUX_ROOT.

Quick start

make dev-desktop-sandbox

What it does