diff --git a/.codespellignore b/.codespellignore
new file mode 100644
index 0000000..e69de29
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..2d87374
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,74 @@
+# Run formatting on all PRs
+
+name: CI
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+  workflow_dispatch: # Allows triggering the workflow manually in GitHub UI
+
+# If another push to the same PR or branch happens while this workflow is still running,
+# cancel the earlier run in favor of the next run.
+#
+# There's no point in testing an outdated version of the code. GitHub only allows
+# a limited number of job runners to be active at the same time, so it's better to cancel
+# pointless jobs early so that more useful jobs can run sooner.
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  format:
+    name: Check formatting
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: pnpm/action-setup@v4
+        with:
+          version: 10.5.1+sha512.c424c076bd25c1a5b188c37bb1ca56cc1e136fbf530d98bcb3289982a08fd25527b8c9c4ec113be5e3393c39af04521dd647bcf1d0801eaf8ac6a7b14da313af
+      - uses: actions/setup-node@v4
+        with:
+          node-version: "18.x"
+          cache: "pnpm"
+      - name: Install dependencies
+        run: pnpm install
+      - name: Check formatting
+        run: pnpm format:check
+
+  lint:
+    name: Check linting
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: pnpm/action-setup@v4
+        with:
+          version: 10.5.1+sha512.c424c076bd25c1a5b188c37bb1ca56cc1e136fbf530d98bcb3289982a08fd25527b8c9c4ec113be5e3393c39af04521dd647bcf1d0801eaf8ac6a7b14da313af
+      - uses: actions/setup-node@v4
+        with:
+          node-version: "18.x"
+          cache: "pnpm"
+      - name: Install dependencies
+        run: pnpm install
+      - name: Check linting
+        run: pnpm lint
+
+  readme-spelling:
+    name: Check README spelling
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: codespell-project/actions-codespell@v2
+        with:
+          ignore_words_file: .codespellignore
+          path: README.md
+
+  check-spelling:
+    name: Check code spelling
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: codespell-project/actions-codespell@v2
+        with:
+          ignore_words_file: .codespellignore
+          path: src
diff --git a/eslint.config.js b/eslint.config.js
index 79a552e..af6a2b5 100644
--- a/eslint.config.js
+++ b/eslint.config.js
@@ -19,6 +19,11 @@ export default tseslint.config(
     },
     rules: {
       ...reactHooks.configs.recommended.rules,
+      "@typescript-eslint/no-explicit-any": 0,
+      "@typescript-eslint/no-unused-vars": [
+        "warn",
+        { args: "none", argsIgnorePattern: "^_", varsIgnorePattern: "^_" },
+      ],
       "react-refresh/only-export-components": [
         "warn",
         { allowConstantExport: true },
diff --git a/package.json b/package.json
index aaf2e3a..a65eec3 100644
--- a/package.json
+++ b/package.json
@@ -11,6 +11,7 @@
     "build": "tsc -b && vite build",
     "lint": "eslint .",
     "format": "prettier --write .",
+    "format:check": "prettier --check .",
     "preview": "vite preview"
   },
   "dependencies": {