PR test add detection of whether interface compatibility is broken.

.github/workflows/pr-test.yml

@@ -46,7 +46,33 @@ jobs:
       - name: Run unit tests
         id: unit-tests
         run: npm run test:quiet
-
+
+      - name: Check DTS API compatibility
+        if: github.event_name == 'pull_request'
+        shell: bash
+        run: |
+          BASE_REF="origin/${{ github.base_ref }}"
+          SNAP_FILE="tests/__snapshots__/dts-snapshot.test.ts.snap"
+
+          # Skip if snapshot file is new (not in base branch yet)
+          if ! git show "$BASE_REF:$SNAP_FILE" > /dev/null 2>&1; then
+            echo "Snapshot file is new, skipping API compatibility check."
+            exit 0
+          fi
+
+          # Check if snapshot file changed compared to base branch
+          if git diff --name-only "$BASE_REF"...HEAD | grep -q "$SNAP_FILE"; then
+            PR_TITLE="${{ github.event.pull_request.title }}"
+            if [[ "$PR_TITLE" != *"[break]"* ]]; then
+              echo "::error::DTS API breaking change detected! The snapshot file changed but the PR title does not contain [break]."
+              echo "::error::If this change is intentional, add [break] to your PR title."
+              exit 1
+            fi
+            echo "API change detected and [break] tag found in PR title."
+          else
+            echo "No DTS API changes detected."
+          fi
+
       - name: Run E2E tests
         id: e2e-tests
         uses: ./.github/actions/run-e2e-tests