diff --git a/backend/webgpu/backend.ts b/backend/webgpu/backend.ts
index 30d15f8..a0495a8 100644
--- a/backend/webgpu/backend.ts
+++ b/backend/webgpu/backend.ts
@@ -1,6 +1,15 @@
+import { enableValidationErrors } from "../../deps.ts";
 import { webgpu } from "../../util.ts";
-import { Backend } from "../types.ts";
-import { WebGPUBackendRequest } from "./types.ts";
+import { Backend, BackendRequest, DataType } from "../types.ts";
+import { WebGPUData } from "./data.ts";
+import { Workgroups } from "./types.ts";
+
+export interface WebGPUBackendRequest<T extends DataType = DataType>
+  extends BackendRequest<T> {
+  pipeline: string;
+  data: WebGPUData<T>[];
+  workgroups: Workgroups;
+}
 
 export class WebGPUBackend implements Backend {
   type = "webgpu" as const;
@@ -11,7 +20,7 @@ export class WebGPUBackend implements Backend {
   device!: GPUDevice;
   pipelines: Map<string, [GPUComputePipeline, GPUBindGroupLayout]> = new Map();
 
-  async initialize(options?: GPURequestAdapterOptions) {
+  async initialize(options?: GPURequestAdapterOptions): Promise<void> {
     if (this.initalized) {
       return;
     }
@@ -31,6 +40,8 @@ export class WebGPUBackend implements Backend {
     this.initalized = true;
     this.adapter = adapter;
     this.device = await adapter.requestDevice();
+    
+    enableValidationErrors(this.device, true);
   }
 
   async register(code: string): Promise<string> {
diff --git a/backend/webgpu/data.ts b/backend/webgpu/data.ts
index 3acb671..4b613b9 100644
--- a/backend/webgpu/data.ts
+++ b/backend/webgpu/data.ts
@@ -70,7 +70,7 @@ export class WebGPUData<T extends DataType = DataType> implements Data<T> {
     ) as DataArray<T>;
   }
 
-  dispose() {
+  dispose(): void {
     this.buffer.destroy();
   }
 }
diff --git a/backend/webgpu/shaders/binary.ts b/backend/webgpu/shaders/binary.ts
index d5e0585..2284e9c 100644
--- a/backend/webgpu/shaders/binary.ts
+++ b/backend/webgpu/shaders/binary.ts
@@ -1,6 +1,9 @@
 import { DataType } from "../../types.ts";
+import { prelude } from "./misc.ts";
 
 export const binary = (type: DataType, expr: string) => `
+${prelude}
+
 [[block]]
 struct Data {
   values: array<${type}>;
diff --git a/backend/webgpu/shaders/matmul.ts b/backend/webgpu/shaders/matmul.ts
index b48a337..e88cdc5 100644
--- a/backend/webgpu/shaders/matmul.ts
+++ b/backend/webgpu/shaders/matmul.ts
@@ -1,6 +1,9 @@
 import { DataType } from "../../types.ts";
+import { prelude } from "./misc.ts";
 
 export const matmul = (type: DataType) => `
+${prelude}
+
 [[block]]
 struct Uniform {
   m: u32;
diff --git a/backend/webgpu/shaders/misc.ts b/backend/webgpu/shaders/misc.ts
new file mode 100644
index 0000000..58176be
--- /dev/null
+++ b/backend/webgpu/shaders/misc.ts
@@ -0,0 +1,11 @@
+export const constants = `
+var<private> e: f32 = 2.718281828459045;
+var<private> pi: f32 = 3.141592653589793;
+var<private> tau: f32 = 6.283185307179586;
+var<private> phi: f32 = 1.618033988749895;
+var<private> feigd: f32 = 4.66920160910299;
+var<private> feiga: f32 = -2.5029078750958926;
+var<private> gauss: f32 = 0.8346268416740732;
+`;
+
+export const prelude = constants;
diff --git a/backend/webgpu/shaders/pad.ts b/backend/webgpu/shaders/pad.ts
index b129a46..f61d88f 100644
--- a/backend/webgpu/shaders/pad.ts
+++ b/backend/webgpu/shaders/pad.ts
@@ -1,6 +1,9 @@
 import { DataType } from "../../types.ts";
+import { prelude } from "./misc.ts";
 
 export const pad = (type: DataType) => `
+${prelude}
+
 [[block]]
 struct Uniform {
   w: u32;
diff --git a/backend/webgpu/shaders/transpose.ts b/backend/webgpu/shaders/transpose.ts
index 0f12d4c..fd080e4 100644
--- a/backend/webgpu/shaders/transpose.ts
+++ b/backend/webgpu/shaders/transpose.ts
@@ -1,6 +1,9 @@
 import { DataType } from "../../types.ts";
+import { prelude } from "./misc.ts";
 
 export const transpose = (type: DataType) => `
+${prelude}
+
 [[block]]
 struct Uniform {
   w: u32;
diff --git a/backend/webgpu/shaders/unary.ts b/backend/webgpu/shaders/unary.ts
index b17758d..5f05bce 100644
--- a/backend/webgpu/shaders/unary.ts
+++ b/backend/webgpu/shaders/unary.ts
@@ -1,6 +1,9 @@
 import { DataType } from "../../types.ts";
+import { prelude } from "./misc.ts";
 
 export const unary = (type: DataType, expr: string) => `
+${prelude}
+
 [[block]]
 struct Data {
   values: array<${type}>;
diff --git a/backend/webgpu/types.ts b/backend/webgpu/types.ts
index 0cb979c..b58865e 100644
--- a/backend/webgpu/types.ts
+++ b/backend/webgpu/types.ts
@@ -1,14 +1,4 @@
-import { BackendRequest, DataType } from "../types.ts";
-import { WebGPUData } from "./data.ts";
-
 export type Workgroups =
   | [number, number, number]
   | [number, number]
   | [number];
-
-export interface WebGPUBackendRequest<T extends DataType = DataType>
-  extends BackendRequest<T> {
-  pipeline: string;
-  data: WebGPUData<T>[];
-  workgroups: Workgroups;
-}
diff --git a/benchmarks/deps.ts b/benchmarks/deps.ts
new file mode 100644
index 0000000..e69de29
diff --git a/deps.ts b/deps.ts
index 1f6fcc1..f5a653d 100644
--- a/deps.ts
+++ b/deps.ts
@@ -1 +1,2 @@
 export * from "https://deno.land/x/byte_type/mod.ts";
+export { enableValidationErrors } from "https://crux.land/gpu_err@1.0.0";
diff --git a/tests/deps.ts b/tests/deps.ts
new file mode 100644
index 0000000..e69de29