diff --git a/.github/workflows/check-cdn-types.yml b/.github/workflows/check-cdn-types.yml
index 1225966..a8ae0e3 100644
--- a/.github/workflows/check-cdn-types.yml
+++ b/.github/workflows/check-cdn-types.yml
@@ -30,6 +30,14 @@ jobs:
         id: check
         run: node packages/app-bridge-types/scripts/check-cdn-updates.mjs
 
+      - name: Upload diff artifact
+        if: steps.check.outputs.has_changes == 'true'
+        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
+        with:
+          name: cdn-types-diff
+          path: ${{ steps.check.outputs.diff_file }}
+          retention-days: 30
+
       - name: Create PR
         if: steps.check.outputs.has_changes == 'true'
         env:
diff --git a/packages/app-bridge-types/scripts/check-cdn-updates.mjs b/packages/app-bridge-types/scripts/check-cdn-updates.mjs
index 74165bf..fe79acd 100644
--- a/packages/app-bridge-types/scripts/check-cdn-updates.mjs
+++ b/packages/app-bridge-types/scripts/check-cdn-updates.mjs
@@ -179,8 +179,14 @@ Merging this PR will trigger a patch release of \`@shopify/app-bridge-types\`.
 const prBodyFile = join(tempDir, 'pr-body.md');
 writeFileSync(prBodyFile, prBody);
 
+// Write diff to a file for artifact upload
+const diffFile = join(tempDir, 'cdn-types.diff');
+writeFileSync(diffFile, diff);
+
 setOutput('has_changes', 'true');
 setOutput('pr_body_file', prBodyFile);
+setOutput('diff_file', diffFile);
 
+console.log(`Diff written to ${diffFile}`);
 console.log(`PR body written to ${prBodyFile}`);
 console.log('Done.');