enum MLContextType {  
  "cpu",   // script-controlled context
  "gpu"   // script-controlled context
  "webgpu",  // managed by the user agent
  // later other context types may be defined, even using multiple devices, e.g. "cpu+npu" etc.
  // Note: in fact all these context types could be separate interface classes as well...
};

enum MLPowerPreference {  // a hint
  "default",
  "high-performance",
  "low-power"
};

dictionary MLContextOptions {  // not a hint
  MLContextType contextType = "cpu";
  MLPowerPreference powerPreference = "default";
  GPUDevice? gpuDevice = null;
};

[SecureContext, Exposed=(Window, DedicatedWorker)]
interface ML {
  Promise<MLContext> createContext(optional MLContextOptions options);

  [Exposed=(DedicatedWorker)]
  MLContext createContextSync(optional MLContextOptions options);

  // Internal slots
  // [[boolean managed]]  // `true` if the user agent controls the context (not really needed)
  // [[MLContextType contextType]] 
  // [[MLPowerPreference powerPreference]]
  // [[implementation]] // perhaps "adapter" would be better

  // further methods (and eventually properties) will follow
};