diff --git a/.github/workflows/sonarcloud-gate.yml b/.github/workflows/sonarcloud-gate.yml
new file mode 100644
index 00000000..2e3a2a9b
--- /dev/null
+++ b/.github/workflows/sonarcloud-gate.yml
@@ -0,0 +1,110 @@
+name: SonarCloud Security Gate
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+    branches:
+      - development
+      - main
+      - master
+
+jobs:
+  security-gate:
+    name: SonarCloud Security Gate
+    runs-on: ubuntu-latest
+    # Skip fork PRs (no access to SONAR_TOKEN)
+    if: github.event.pull_request.head.repo.full_name == github.repository
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: SonarCloud Scan
+        uses: SonarSource/sonarqube-scan-action@v6
+        env:
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+
+      - name: Check for security BLOCKER issues
+        env:
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+        run: |
+          PR_NUMBER="${{ github.event.pull_request.number }}"
+          PROJECT_KEY="NASA-AMMOS_MMGIS"
+          MAX_ATTEMPTS=20
+          SLEEP_SECONDS=30
+
+          echo "Checking SonarCloud for security BLOCKER issues on PR #${PR_NUMBER}"
+
+          # Poll until SonarCloud has processed the analysis for this PR
+          for attempt in $(seq 1 $MAX_ATTEMPTS); do
+            echo "Attempt ${attempt}/${MAX_ATTEMPTS}: Querying SonarCloud..."
+
+            ANALYSIS_RESPONSE=$(curl -s -u "${SONAR_TOKEN}:" \
+              "https://sonarcloud.io/api/qualitygates/project_status?projectKey=${PROJECT_KEY}&pullRequest=${PR_NUMBER}")
+
+            ANALYSIS_STATUS=$(echo "$ANALYSIS_RESPONSE" | python3 -c "import sys, json; print(json.load(sys.stdin).get('projectStatus', {}).get('status', 'NONE'))" 2>/dev/null || echo "NONE")
+
+            if [ "$ANALYSIS_STATUS" = "OK" ] || [ "$ANALYSIS_STATUS" = "ERROR" ]; then
+              echo "SonarCloud analysis complete (gate status: ${ANALYSIS_STATUS})."
+              break
+            fi
+
+            if [ "$attempt" -eq "$MAX_ATTEMPTS" ]; then
+              echo "Timed out after $((MAX_ATTEMPTS * SLEEP_SECONDS))s waiting for SonarCloud analysis."
+              exit 1
+            fi
+
+            echo "  Analysis not ready yet. Waiting ${SLEEP_SECONDS}s..."
+            sleep $SLEEP_SECONDS
+          done
+
+          # Query for BLOCKER security issues on this PR's new code
+          ISSUES_RESPONSE=$(curl -s -u "${SONAR_TOKEN}:" \
+            "https://sonarcloud.io/api/issues/search?projectKeys=${PROJECT_KEY}&pullRequest=${PR_NUMBER}&severities=BLOCKER&types=VULNERABILITY&tags=security&statuses=OPEN,CONFIRMED,REOPENED&ps=1")
+
+          BLOCKER_COUNT=$(echo "$ISSUES_RESPONSE" | python3 -c "import sys, json; print(json.load(sys.stdin).get('total', -1))" 2>/dev/null || echo "-1")
+
+          echo ""
+          echo "Security BLOCKER issues found: ${BLOCKER_COUNT}"
+
+          if [ "$BLOCKER_COUNT" = "-1" ]; then
+            echo "ERROR: Failed to parse SonarCloud response."
+            echo "$ISSUES_RESPONSE"
+            exit 1
+          elif [ "$BLOCKER_COUNT" = "0" ]; then
+            echo "No security BLOCKER issues found. Check passed."
+            exit 0
+          else
+            echo "Security BLOCKER issues detected! Fetching details..."
+            echo ""
+
+            # Fetch up to 10 blocker issues with details
+            DETAILS=$(curl -s -u "${SONAR_TOKEN}:" \
+              "https://sonarcloud.io/api/issues/search?projectKeys=${PROJECT_KEY}&pullRequest=${PR_NUMBER}&severities=BLOCKER&types=VULNERABILITY&tags=security&statuses=OPEN,CONFIRMED,REOPENED&ps=10")
+
+            echo "$DETAILS" | python3 -c "
+          import sys, json
+          data = json.load(sys.stdin)
+          for issue in data.get('issues', []):
+              component = issue.get('component', '').replace('${PROJECT_KEY}:', '')
+              line = issue.get('line', '?')
+              msg = issue.get('message', 'No message')
+              rule = issue.get('rule', '?')
+              tags = ', '.join(issue.get('tags', []))
+              print(f'  [{rule}] {component}:{line} — {msg} (tags: {tags})')
+          "
+            echo ""
+            echo "Fix these security BLOCKER issues before merging."
+            exit 1
+          fi
+
+      - name: Summary
+        if: always()
+        run: |
+          echo "### SonarCloud Security Gate" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "PR #${{ github.event.pull_request.number }} was checked for security BLOCKER issues." >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "[View in SonarCloud](https://sonarcloud.io/summary/new_code?id=NASA-AMMOS_MMGIS&pullRequest=${{ github.event.pull_request.number }})" >> $GITHUB_STEP_SUMMARY
diff --git a/configure/package.json b/configure/package.json
index d6fb3bdc..9e2c3941 100644
--- a/configure/package.json
+++ b/configure/package.json
@@ -1,6 +1,6 @@
 {
   "name": "configure",
-  "version": "4.2.15-20260302",
+  "version": "4.2.16-20260304",
   "homepage": "./configure/build",
   "private": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 32db245e..191e325f 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "mmgis",
-  "version": "4.2.15-20260302",
+  "version": "4.2.16-20260304",
   "description": "A web-based mapping and localization solution for science operation on planetary missions.",
   "homepage": "build",
   "repository": {
diff --git a/sonar-project.properties b/sonar-project.properties
index 13b9841c..2316a777 100644
--- a/sonar-project.properties
+++ b/sonar-project.properties
@@ -16,7 +16,7 @@ sonar.links.ci=https://github.com/NASA-AMMOS/MMGIS/actions
 # Source directories to analyze
 # Note: 'public' directory excluded from sources to reduce LOC - contains mostly static assets (SVGs, images, config files)
 # Note: 'auxiliary' directory excluded from sources - contains standalone utility scripts, not server code
-sonar.sources=src,API,scripts,views,configure
+sonar.sources=src,API,scripts,views,configure,spice
 # Note: sonar.tests is not set because test files are intermixed with source files.
 # Test files are excluded via sonar.test.exclusions patterns below.
 
@@ -50,7 +50,9 @@ sonar.exclusions=\
   **/public/**,\
   **/auxiliary/**,\
   **/images/**,\
-  **/fonts/**
+  **/fonts/**,\
+  **/examples/**,\
+  **/.github/**
 
 # Test exclusions
 sonar.test.exclusions=\