diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index adca5601a..3fe9d2bf9 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -136,18 +136,21 @@ jobs:
           name: db.head.json.gz
           path: head
       - name: Diff databases
-        run: packages/@aws-cdk/service-spec-importers/bin/diff-db base/db.json.gz  head/db.json.gz > DIFF
-      - id: diff-db
+        id: diff-db
+        run: packages/@aws-cdk/service-spec-importers/bin/diff-db base/db.json.gz head/db.json.gz > DIFF || echo "diff-result=true" >> $GITHUB_OUTPUT
+        continue-on-error: true
+      - name: Create PR.md
+        if: steps.diff-db.outputs.diff-result
         run: |-
-          echo "diff=$(cat DIFF)" >> $GITHUB_OUTPUT
-          echo "\`\`\`\n$(cat DIFF)\n\`\`\`\" >> $GITHUB_STEP_SUMMARY
+          echo 'Model database diff introduced between base and head branch:
+
+          ' >> PR.md
+          echo '```\n' >> PR.md
+          cat DIFF >> PR.md
+          echo '\n```\n' >> PR.md
       - name: Comment diff
-        if: ${{ steps.diff-db.outputs.diff }}
+        if: steps.diff-db.outputs.diff-result
         uses: thollander/actions-comment-pull-request@v2
         with:
           comment_tag: diff-db
-          message: |
-            Model database diff introduced between base and head branch:
-            ```
-            ${{ steps.diff-db.outputs.diff }}
-            ```
+          filePath: PR.md
diff --git a/projenrc/diff-db.ts b/projenrc/diff-db.ts
index 6cfd4b8c8..918c6b11d 100644
--- a/projenrc/diff-db.ts
+++ b/projenrc/diff-db.ts
@@ -126,24 +126,30 @@ export class DiffDb extends pj.Component {
         },
         {
           name: 'Diff databases',
-          run: `${this.path(this.importers.outdir + '/bin/diff-db')} base/db.json.gz  head/db.json.gz > DIFF`,
+          id: 'diff-db',
+          continueOnError: true,
+          run: `${this.path(
+            this.importers.outdir + '/bin/diff-db',
+          )} base/db.json.gz head/db.json.gz > DIFF || echo "diff-result=true" >> $GITHUB_OUTPUT`,
         },
         {
-          id: 'diff-db',
+          name: 'Create PR.md',
+          if: 'steps.diff-db.outputs.diff-result',
           run: [
-            'echo "diff=$(cat DIFF)" >> $GITHUB_OUTPUT',
-            'echo "\\`\\`\\`\\n$(cat DIFF)\\n\\`\\`\\`\\" >> $GITHUB_STEP_SUMMARY',
+            "echo 'Model database diff introduced between base and head branch:\n\n' >> PR.md",
+            "echo '```\\n' >> PR.md",
+            'cat DIFF >> PR.md',
+            "echo '\\n```\\n' >> PR.md",
+            // 'echo "(cat PR.md)" >> $GITHUB_STEP_SUMMARY',
           ].join('\n'),
         },
-
         {
           name: 'Comment diff',
-          if: '${{ steps.diff-db.outputs.diff }}',
+          if: 'steps.diff-db.outputs.diff-result',
           uses: 'thollander/actions-comment-pull-request@v2',
           with: {
             comment_tag: 'diff-db',
-            message:
-              'Model database diff introduced between base and head branch:\n```\n${{ steps.diff-db.outputs.diff }}\n```\n',
+            filePath: 'PR.md',
           },
         },
       ],