diff --git a/.github/workflows/pr-check.yml b/.github/workflows/pr-check.yml
new file mode 100644
index 0000000..c470d01
--- /dev/null
+++ b/.github/workflows/pr-check.yml
@@ -0,0 +1,36 @@
+# check incoming pr's and make sure that
+# - the code builds
+# - the dist folder does not need updating
+name: PR Check
+
+on:
+  push:
+
+  pull_request:
+
+jobs:
+  build-and-check-dist:
+    name: Run build and check dist folder
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+      - uses: actions/setup-node@8f152de45cc393bb48ce5d89d36b731f54556e65 # v4.0.0
+        with:
+          node-version: '20'
+          
+      - name: Compile with NPM
+        run: |
+          npm ci
+          npm run compile
+          npm run package
+
+      - name: Check if there are changes that where not in the commit
+        run: |
+          if [ -n "$(git status --porcelain)" ]; then 
+            echo "Found changes to commit after building. Here is the output from `git status`:"
+            git status
+
+            exit 1
+          else 
+            echo "No changes found after compiling. PR is good for a review."
+          fi
diff --git a/dist/index.js b/dist/index.js
index 81ce109..e40ebbb 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -35066,7 +35066,7 @@ async function getPrFilesWithBlobSize(pullRequestNumber) {
         : data;
     const prFilesWithBlobSize = await Promise.all(files
         // Cannot get blobs for files without sha (e.g. happens when only changing a permission bit on the file) or without blob_url (e.g. submodules)
-        .filter(file => file.sha != null && file.blob_url != null)
+        .filter(file => file.sha !== null && file.blob_url !== null)
         .map(async (file) => {
         const { filename, sha, patch } = file;
         const { data: blob } = await octokit.rest.git.getBlob({
diff --git a/src/index.ts b/src/index.ts
index e39418b..f0b2a00 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -200,7 +200,7 @@ async function getPrFilesWithBlobSize(pullRequestNumber: number) {
   const prFilesWithBlobSize = await Promise.all(
     files
       // Cannot get blobs for files without sha (e.g. happens when only changing a permission bit on the file) or without blob_url (e.g. submodules)
-      .filter(file => file.sha != null && file.blob_url != null)
+      .filter(file => file.sha !== null && file.blob_url !== null)
       .map(async file => {
         const {filename, sha, patch} = file;
         const {data: blob} = await octokit.rest.git.getBlob({