diff --git a/.github/scripts/validate-pr-number.js b/.github/scripts/validate-pr-number.js
new file mode 100644
index 00000000000000..d65dfd7e525270
--- /dev/null
+++ b/.github/scripts/validate-pr-number.js
@@ -0,0 +1,36 @@
+// @ts-check
+
+const { readFileSync } = require('node:fs');
+
+module.exports = main;
+
+/**
+ *
+ * @param {{filePath:string}} options
+ * @returns {number}
+ */
+function main(options) {
+  return validatePrNumber(options.filePath);
+}
+
+/**
+ *
+ * @param {string} filePath
+ * @returns {number}
+ */
+function validatePrNumber(filePath) {
+  try {
+    const content = readFileSync(filePath, 'utf-8').trim();
+    const prNumber = Number(content);
+
+    if (isNaN(prNumber) || !Number.isInteger(prNumber)) {
+      throw new Error('The ID in pr.txt is not a valid PR number.');
+    }
+
+    console.info('✅ PR ID valid');
+    return prNumber;
+  } catch (err) {
+    console.error(`Error: ${err.message}`);
+    process.exit(1);
+  }
+}
diff --git a/.github/workflows/pr-website-deploy-comment.yml b/.github/workflows/pr-website-deploy-comment.yml
index cb10d9b5f6a6bb..d636e5ad9ddcde 100644
--- a/.github/workflows/pr-website-deploy-comment.yml
+++ b/.github/workflows/pr-website-deploy-comment.yml
@@ -19,14 +19,18 @@ jobs:
     runs-on: ubuntu-latest
     if: ${{ github.event.workflow_run.event == 'pull_request' && github.event.workflow_run.conclusion == 'success' }}
     outputs:
-      pr_number: ${{ steps.pr_number.outputs.id }}
+      pr_number: ${{ steps.pr_number.outputs.result }}
       website_url: ${{ steps.website_url.outputs.id }}
     permissions:
       id-token: write
 
     steps:
-      - name: Download WebSite artifacts
-        uses: actions/download-artifact@v4
+      - uses: actions/checkout@v4
+        with:
+          sparse-checkout: |
+            .github
+
+      - uses: actions/download-artifact@v4
         with:
           name: pr-website-artifacts
           path: ./website
@@ -41,13 +45,18 @@ jobs:
           github-token: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Load PR number
+        uses: actions/github-script@v7
         id: pr_number
-        run: echo "id=$(cat pr.txt)" >> $GITHUB_OUTPUT
-        working-directory: ./results
+        with:
+          script: |
+            const run = require('./.github/scripts/validate-pr-number');
+            const result = run({filePath:'results/pr.txt'});
+            return result;
+          result-encoding: string
 
       - name: Load WEBSITE URL
         id: website_url
-        run: echo "id=${{env.DEPLOY_HOST_URL}}pull/${{steps.pr_number.outputs.id}}/" >> $GITHUB_OUTPUT
+        run: echo "id=${{env.DEPLOY_HOST_URL}}pull/${{steps.pr_number.outputs.result}}/" >> $GITHUB_OUTPUT
 
       - name: Login via Azure CLI
         uses: azure/login@v2
@@ -67,7 +76,7 @@ jobs:
               --destination '$web' \
               --source ./website \
               --account-name ${{ env.AZURE_STORAGE }} \
-              --destination-path pull/${{steps.pr_number.outputs.id}} \
+              --destination-path pull/${{steps.pr_number.outputs.result}} \
               --auth-mode login \
               --overwrite