diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
new file mode 100644
index 0000000..714e54c
--- /dev/null
+++ b/.github/workflows/publish.yml
@@ -0,0 +1,86 @@
+name: Publish packages
+
+on:
+  push:
+    branches: [ master ]
+    tags:
+    - 'v*.*.*'
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  pkg-pr-new:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v6
+
+    - name: Use Node.js
+      uses: actions/setup-node@v6
+      with:
+        node-version: 24.x
+        cache: npm
+
+    - name: Install dependencies
+      run: npm ci
+
+    - name: Build
+      run: npm run build
+
+    - name: Test
+      run: npm run test
+
+    - name: Publish package to pkg.pr.new
+      run: npm exec -- pkg-pr-new publish "."
+
+  publish:
+    needs:
+    - pkg-pr-new
+    if: startsWith(github.ref, 'refs/tags/v')
+    permissions:
+      contents: read
+      id-token: write
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v6
+
+    - name: Use Node.js
+      uses: actions/setup-node@v6
+      with:
+        node-version: 24.x
+        registry-url: https://registry.npmjs.org
+        package-manager-cache: false
+
+    - name: Configure release
+      id: release
+      run: |
+        PACKAGE_NAME=$(node -p "require('./package.json').name")
+        BASE_VERSION=$(node -p "require('./package.json').version")
+
+        if [[ ! "$GITHUB_REF_NAME" =~ ^v[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+          echo "::error::Release tags must match vX.X.X, got $GITHUB_REF_NAME."
+          exit 1
+        fi
+
+        PACKAGE_VERSION="${GITHUB_REF_NAME#v}"
+        if [[ "$PACKAGE_VERSION" != "$BASE_VERSION" ]]; then
+          echo "::error::Tag $GITHUB_REF_NAME does not match package.json version $BASE_VERSION."
+          exit 1
+        fi
+
+        if npm view "$PACKAGE_NAME@$PACKAGE_VERSION" version >/dev/null 2>&1; then
+          echo "already_published=true" >> "$GITHUB_OUTPUT"
+        else
+          echo "already_published=false" >> "$GITHUB_OUTPUT"
+        fi
+
+    - name: Publish package to npm
+      if: steps.release.outputs.already_published == 'false'
+      run: npm publish --provenance --access public
+
+    - name: Skip already published version
+      if: steps.release.outputs.already_published == 'true'
+      run: echo "$GITHUB_REF_NAME is already published; skipping npm publish."
diff --git a/package-lock.json b/package-lock.json
index be0cbd5..bbd160a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,6 +9,7 @@
       "version": "0.15.0",
       "license": "MIT",
       "devDependencies": {
+        "pkg-pr-new": "^0.0.75",
         "react": "^19.2.0",
         "react-dom": "^19.2.0",
         "rescript": "^12.0.0"
@@ -111,6 +112,16 @@
         "node": ">=20.11.0"
       }
     },
+    "node_modules/pkg-pr-new": {
+      "version": "0.0.75",
+      "resolved": "https://registry.npmjs.org/pkg-pr-new/-/pkg-pr-new-0.0.75.tgz",
+      "integrity": "sha512-u9mdErTewKSMsr+ceCt8VcNuNP0ro5AXiPXhUVApuEyqr2Zlvt+DdCFBcm+yGWN8mhOdZJ27meIDbnoZgfzpOw==",
+      "dev": true,
+      "license": "MIT",
+      "bin": {
+        "pkg-pr-new": "bin/cli.js"
+      }
+    },
     "node_modules/react": {
       "version": "19.2.4",
       "resolved": "https://registry.npmjs.org/react/-/react-19.2.4.tgz",
@@ -223,6 +234,12 @@
       "dev": true,
       "optional": true
     },
+    "pkg-pr-new": {
+      "version": "0.0.75",
+      "resolved": "https://registry.npmjs.org/pkg-pr-new/-/pkg-pr-new-0.0.75.tgz",
+      "integrity": "sha512-u9mdErTewKSMsr+ceCt8VcNuNP0ro5AXiPXhUVApuEyqr2Zlvt+DdCFBcm+yGWN8mhOdZJ27meIDbnoZgfzpOw==",
+      "dev": true
+    },
     "react": {
       "version": "19.2.4",
       "resolved": "https://registry.npmjs.org/react/-/react-19.2.4.tgz",
diff --git a/package.json b/package.json
index 3762776..9a9791d 100644
--- a/package.json
+++ b/package.json
@@ -29,6 +29,7 @@
   },
   "homepage": "https://rescript-lang.org/docs/react/latest/introduction",
   "devDependencies": {
+    "pkg-pr-new": "^0.0.75",
     "react": "^19.2.0",
     "react-dom": "^19.2.0",
     "rescript": "^12.0.0"
@@ -38,4 +39,4 @@
     "react": ">=19.2.0",
     "react-dom": ">=19.2.0"
   }
-}
\ No newline at end of file
+}
diff --git a/src/React.res b/src/React.res
index dce5f54..e453bfc 100644
--- a/src/React.res
+++ b/src/React.res
@@ -472,4 +472,4 @@ useEffectEvent is a React Hook that lets you extract non-reactive logic from you
 [Read more on the React Documentation](https://react.dev/reference/react/useEffectEvent)
 */
 @module("react")
-external useEffectEvent: (unit => unit) => unit = "useEffectEvent"
+external useEffectEvent: ('event => unit) => 'event => unit = "useEffectEvent"