chore: add knip

Author: serhalp

.github/workflows/knip.yml

@@ -0,0 +1,25 @@
+name: Knip
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+permissions:
+  contents: read
+
+jobs:
+  knip:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v6
+      - name: Set up Node.js
+        uses: actions/setup-node@v6
+        with:
+          node-version: 24.x
+      - name: Set up PNPM
+        run: corepack enable
+      - run: pnpm install
+
+      - run: pnpm run knip

knip.config.ts

@@ -0,0 +1,32 @@
+import type { KnipConfig } from "knip";
+
+export default {
+  entry: ["eslint.config.mjs"],
+  // knip's Nuxt plugin doesn't support the Nuxt 4 app/ directory convention yet.
+  // Note: custom entry replaces (not merges with) the plugin defaults.
+  nuxt: {
+    entry: [
+      "app/app.vue",
+      "app/error.vue",
+      "app/pages/**/*.vue",
+      "app/components/**/*.vue",
+      "app/composables/**/*.ts",
+      "app/utils/**/*.ts",
+      "app/layouts/**/*.vue",
+      "app/middleware/**/*.ts",
+      "server/api/**/*.ts",
+      "server/routes/**/*.ts",
+      "server/middleware/**/*.ts",
+      "server/plugins/**/*.ts",
+      "server/**/*.ts",
+    ],
+    config: ["nuxt.config.ts"],
+  },
+  ignoreDependencies: [
+    "vue",
+    "vue-router",
+    "vue-tsc",
+    "vitest-environment-nuxt",
+  ],
+  ignoreBinaries: ["eslint"],
+} satisfies KnipConfig;

package.json

@@ -15,6 +15,7 @@
     "preview": "nuxt preview",
     "postinstall": "nuxt prepare",
     "test:unit": "vitest run",
+    "knip": "knip",
     "test": "pnpm run typecheck && pnpm run lint && pnpm run test:unit",
     "typecheck": "nuxi typecheck"
   },
@@ -32,6 +33,7 @@
     "@nuxt/test-utils": "^4.0.0",
     "@vue/test-utils": "^2.4.6",
     "happy-dom": "^20.6.2",
+    "knip": "^5.83.1",
     "typescript": "^5.6.2",
     "vitest": "^4.0.18",
     "vue-tsc": "^3.2.4"