Derive Macro GpuiComponentShape 

#[derive(GpuiComponentShape)]
{
    // Attributes available to this derive:
    #[gpui_component_shape]
}

Derive macro for GPUI component shape metadata.

When #[gpui_component_shape(...)] is present, state = ... may be omitted if the backing state follows the ComponentState naming convention. By default the derive calls <State>::new(window, cx). Override the constructor with new = ..., a closure, or a direct constructor expression.

value = ... or values(...) publish exact supported value types. For value_binding shapes, value compatibility may also be inferred from State: GpuiComponentStateValueBinding<T>.

Common MCP input metadata is inferred from declared value metadata when the shape has unambiguous string, boolean, numeric, date, date-time, array, set, range, object-map, or unconstrained JSON value shapes. Each generated ComponentShapeFor<Value> impl carries the value-specific metadata; the shape-level metadata is emitted only when all declared values agree. Use mcp_input = string, mcp_input = object, or another McpInput expression when a generic or custom shape knows its model-facing MCP input better than the value type can be inferred.