Circuit is an add-on that generates procedural circuit-like patterns consisting of branching paths and geometric routing. It provides user controls for adjusting pattern density, trace width, and randomness. The tool features content-aware editing and includes a live update function to preview changes as they are made. It operates from a dedicated custom tab within the 3D viewport and is well-suited for creating sci-fi user interfaces, heads-up display graphics, technical panels, and cyberpunk-style decals.