diff --git a/cspell.config.yaml b/cspell.config.yaml
index 170864c..7af4591 100644
--- a/cspell.config.yaml
+++ b/cspell.config.yaml
@@ -52,6 +52,7 @@ words:
   - gcornut
   - giteeai
   - gltf
+  - gpuu
   - grammyjs
   - groq
   - guiiai
diff --git a/packages/gpuu/package.json b/packages/gpuu/package.json
new file mode 100644
index 0000000..62fd8f7
--- /dev/null
+++ b/packages/gpuu/package.json
@@ -0,0 +1,50 @@
+{
+  "name": "@proj-airi/gpuu",
+  "type": "module",
+  "private": true,
+  "description": "A collection of utilities for working with GPUs, especially for WebGPU.",
+  "author": {
+    "name": "Neko Ayaka",
+    "email": "neko@ayaka.moe",
+    "url": "https://github.com/nekomeowww"
+  },
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/moeru-ai/airi.git",
+    "directory": "packages/gpuu"
+  },
+  "exports": {
+    ".": {
+      "types": "./dist/index.d.ts",
+      "import": "./dist/index.mjs",
+      "require": "./dist/index.cjs"
+    },
+    "./webgpu": {
+      "types": "./dist/webgpu/index.d.ts",
+      "import": "./dist/webgpu/index.mjs",
+      "require": "./dist/webgpu/index.cjs"
+    }
+  },
+  "main": "./dist/index.cjs",
+  "module": "./dist/index.mjs",
+  "types": "./dist/index.d.ts",
+  "files": [
+    "README.md",
+    "dist",
+    "package.json"
+  ],
+  "scripts": {
+    "dev": "pnpm run stub",
+    "stub": "unbuild --stub",
+    "build": "unbuild",
+    "typecheck": "tsc --noEmit"
+  },
+  "dependencies": {
+    "defu": "^6.1.4"
+  },
+  "devDependencies": {
+    "@types/node": "^22.13.8",
+    "@webgpu/types": "^0.1.54"
+  }
+}
diff --git a/packages/gpuu/src/index.ts b/packages/gpuu/src/index.ts
new file mode 100644
index 0000000..9013cfe
--- /dev/null
+++ b/packages/gpuu/src/index.ts
@@ -0,0 +1 @@
+console.warn('Please import \'@proj-airi/gpuu\' instead.')
diff --git a/packages/gpuu/src/webgpu/checker.ts b/packages/gpuu/src/webgpu/checker.ts
new file mode 100644
index 0000000..778e570
--- /dev/null
+++ b/packages/gpuu/src/webgpu/checker.ts
@@ -0,0 +1,36 @@
+export interface WebGPUCheckResult {
+  supported: boolean
+  fp16Supported: boolean
+  isNode: boolean
+  reason: string
+  adapter?: GPUAdapter
+}
+
+export async function check(): Promise<WebGPUCheckResult> {
+  try {
+    if (isInNodejsRuntime())
+      return { supported: false, isNode: true, reason: '', fp16Supported: false }
+
+    if (typeof navigator === 'undefined' || !navigator.gpu)
+      return { supported: false, isNode: false, reason: 'WebGPU is not available (navigator.gpu is undefined)', fp16Supported: false }
+
+    const adapter = await navigator.gpu.requestAdapter()
+    if (!adapter)
+      return { supported: false, isNode: false, reason: 'WebGPU is not supported (no adapter found)', fp16Supported: false }
+
+    return { supported: true, isNode: false, reason: '', adapter, fp16Supported: adapter.features.has('shader-f16') }
+  }
+  catch (error) {
+    const errorMessage = error instanceof Error ? error.toString() : String(error)
+    return { supported: false, isNode: false, reason: errorMessage, fp16Supported: false }
+  }
+}
+
+function isInNodejsRuntime() {
+  // eslint-disable-next-line node/prefer-global/process
+  return typeof process !== 'undefined'
+    // eslint-disable-next-line node/prefer-global/process
+    && 'versions' in process && process.versions != null && typeof process.versions === 'object'
+    // eslint-disable-next-line node/prefer-global/process
+    && 'node' in process.versions && process.versions.node != null
+}
diff --git a/packages/gpuu/src/webgpu/index.ts b/packages/gpuu/src/webgpu/index.ts
new file mode 100644
index 0000000..484b939
--- /dev/null
+++ b/packages/gpuu/src/webgpu/index.ts
@@ -0,0 +1,2 @@
+export { check } from './checker'
+export type { WebGPUCheckResult } from './checker'
diff --git a/packages/gpuu/tsconfig.json b/packages/gpuu/tsconfig.json
new file mode 100644
index 0000000..30180dc
--- /dev/null
+++ b/packages/gpuu/tsconfig.json
@@ -0,0 +1,29 @@
+{
+  "compilerOptions": {
+    "target": "ESNext",
+    "lib": [
+      "ESNext",
+      "DOM",
+      "DOM.Iterable",
+      "WebWorker"
+    ],
+    "module": "ESNext",
+    "moduleResolution": "bundler",
+    "types": [
+      "node",
+      // @webgpu/types
+      // https://www.npmjs.com/package/@webgpu/types
+      "@webgpu/types"
+    ],
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+    "isolatedModules": true,
+    "verbatimModuleSyntax": true,
+    "skipLibCheck": true
+  },
+  "include": [
+    "src/**/*.ts",
+    "src/**/*.d.ts",
+    "src/**/*.mts"
+  ]
+}
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 260d10f..6e6d026 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -707,6 +707,9 @@ importers:
       '@shikijs/markdown-it':
         specifier: ^3.1.0
         version: 3.1.0(markdown-it-async@2.0.0)
+      '@types/json-schema':
+        specifier: ^7.0.15
+        version: 7.0.15
       '@types/markdown-it-link-attributes':
         specifier: ^3.0.5
         version: 3.0.5
@@ -927,6 +930,19 @@ importers:
         specifier: ^1.52.0
         version: 1.52.0(encoding@0.1.13)
 
+  packages/gpuu:
+    dependencies:
+      defu:
+        specifier: ^6.1.4
+        version: 6.1.4
+    devDependencies:
+      '@types/node':
+        specifier: ^22.13.8
+        version: 22.13.8
+      '@webgpu/types':
+        specifier: ^0.1.54
+        version: 0.1.54
+
   packages/hfup:
     dependencies:
       defu: