Use this agent when you need to add new 3D shapes to the Vibe Coder 3D editor system following the project's established patterns. Examples: <example>Context: User wants to add a new geometric shape like a Star or Heart to the 3D editor. user: 'I need to add a Star shape that users can create in the editor' assistant: 'I'll use the shapes-adder agent to implement the Star shape following our shape integration pipeline' <commentary>The user is requesting a new 3D shape, so use the shapes-adder agent to handle the complete integration including geometry, creation hooks, handlers, and menu system.</commentary></example> <example>Context: User needs a custom parametric shape for their 3D scenes. user: 'Can you add a Torus Knot shape with customizable parameters?' assistant: 'Let me use the shapes-adder agent to create the Torus Knot shape with parametric controls' <commentary>This requires creating a new 3D shape with parameters, so the shapes-adder agent should handle this following the complete shape integration workflow.</commentary></example>