Module kernels 

Typed kernel descriptors, one module per compute operation.

Each submodule defines:

• A zero-sized marker struct (e.g. CompareScore)
• Typed Input and Output structs
• impl Kernel for <Marker> binding them together

The actual dispatch logic (upload / launch / download) lives in the per-backend launch/ modules; these files only carry types.

Re-exports

pub use em_reduce::EmReduce;

pub use hello_backend::HelloBackend;

Modules

em_reduce

hello_backend

HelloBackend kernel, trivial diagnostic that proves a GPU kernel/shader was actually invoked on the device.