diff --git a/plugins/platform-test/backend/platform-test b/plugins/platform-test/backend/platform-test
new file mode 100755
index 0000000..09c3b73
Binary files /dev/null and b/plugins/platform-test/backend/platform-test differ
diff --git a/scripts/build.sh b/scripts/build.sh
new file mode 100755
index 0000000..597414a
--- /dev/null
+++ b/scripts/build.sh
@@ -0,0 +1,84 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "$0")/.." && pwd)"
+FAILED=0
+
+report() {
+  if [ "$2" -eq 0 ]; then
+    echo "  ✅ $1"
+  else
+    echo "  ❌ $1"
+    FAILED=1
+  fi
+}
+
+echo "=== verstak-official-plugins build ==="
+
+BUILT=0
+SKIPPED=0
+FAILED_PLUGINS=""
+
+for plugin_dir in "$ROOT"/plugins/*/; do
+  [ -d "$plugin_dir" ] || continue
+  plugin_name="$(basename "$plugin_dir")"
+  echo ""
+  echo "--- [$plugin_name] ---"
+
+  # Validate plugin.json
+  if [ ! -f "$plugin_dir/plugin.json" ]; then
+    echo "  ❌ plugin.json not found"
+    FAILED=1
+    FAILED_PLUGINS="$FAILED_PLUGINS $plugin_name"
+    continue
+  fi
+  if command -v python3 &>/dev/null; then
+    if python3 -c "import json; json.load(open('$plugin_dir/plugin.json'))" 2>/dev/null; then
+      echo "  ✅ plugin.json: valid JSON"
+    else
+      echo "  ❌ plugin.json: invalid JSON"
+      FAILED=1
+      FAILED_PLUGINS="$FAILED_PLUGINS $plugin_name"
+      continue
+    fi
+  else
+    echo "  ℹ️  python3 not available — skipping JSON validation"
+  fi
+
+  # Frontend build
+  if [ -f "$plugin_dir/frontend/package.json" ]; then
+    echo "  → frontend: npm ci + build"
+    (cd "$plugin_dir/frontend" && npm ci --no-audit --no-fund)
+    report "npm ci" $?
+    (cd "$plugin_dir/frontend" && npm run build)
+    report "frontend build" $?
+    BUILT=1
+  else
+    echo "  ℹ️  no frontend/package.json — skipping frontend"
+  fi
+
+  # Backend build (Go)
+  if [ -f "$plugin_dir/backend/go.mod" ] || [ -f "$plugin_dir/backend/main.go" ]; then
+    echo "  → backend: go build"
+    if [ -d "$plugin_dir/backend" ]; then
+      (cd "$plugin_dir/backend" && go build ./...)
+      report "backend go build" $?
+      BUILT=1
+    fi
+  else
+    echo "  ℹ️  no backend/ — skipping backend"
+  fi
+done
+
+echo ""
+echo "=== summary ==="
+echo "  plugins found: $(ls -d "$ROOT"/plugins/*/ 2>/dev/null | wc -l)"
+if [ -n "$FAILED_PLUGINS" ]; then
+  echo "  failed: $FAILED_PLUGINS"
+fi
+if [ "$FAILED" -eq 0 ]; then
+  echo "✅ build passed"
+else
+  echo "❌ build failed"
+fi
+exit "$FAILED"
diff --git a/scripts/check.sh b/scripts/check.sh
new file mode 100755
index 0000000..d4ca7dd
--- /dev/null
+++ b/scripts/check.sh
@@ -0,0 +1,88 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "$0")/.." && pwd)"
+FAILED=0
+
+report() {
+  if [ "$2" -eq 0 ]; then
+    echo "  ✅ $1"
+  else
+    echo "  ❌ $1"
+    FAILED=1
+  fi
+}
+
+echo "=== verstak-official-plugins check ==="
+
+# Validate all plugin manifests against the SDK schema
+if command -v python3 &>/dev/null; then
+  echo "[manifest validation]"
+  SDK_SCHEMA="$ROOT/../verstak-sdk/schemas/manifest.json"
+  if [ -f "$SDK_SCHEMA" ]; then
+    python3 -c "
+import json, glob
+
+skipped = []
+problems = []
+
+for plugin_dir in glob.glob('$ROOT/plugins/*/'):
+    manifest_path = plugin_dir + 'plugin.json'
+    try:
+        with open(manifest_path) as f:
+            manifest = json.load(f)
+    except FileNotFoundError:
+        skipped.append(plugin_dir.split('/')[-2])
+        continue
+    except json.JSONDecodeError as e:
+        problems.append(f'{plugin_dir.split(\"/\")[-2]}: invalid JSON — {e}')
+        continue
+
+    checks = {
+        'id': isinstance(manifest.get('id'), str) and '.' in manifest['id'],
+        'version': isinstance(manifest.get('version'), str),
+        'schemaVersion': manifest.get('schemaVersion') == 1,
+        'provides': isinstance(manifest.get('provides'), list),
+        'requires': isinstance(manifest.get('requires'), list),
+    }
+    for check, ok in checks.items():
+        if not ok:
+            problems.append(f'{manifest.get(\"id\", plugin_dir.split(\"/\")[-2])}: missing/empty \"{check}\"')
+
+if skipped:
+    print(f'  ⚠️  skipped (no plugin.json): {\", \".join(skipped)}')
+if problems:
+    for p in problems:
+        print(f'  ❌ {p}')
+else:
+    print('  ✅ all manifests valid')
+"
+    report "manifests valid" $?
+  else
+    echo "  ℹ️  SDK schema not found at $SDK_SCHEMA — run build.sh in verstak-sdk first"
+  fi
+else
+  echo "  ℹ️  python3 not available — skipping manifest validation"
+fi
+
+echo ""
+# Check all scripts in plugins are executable
+echo "[script permissions]"
+MISSING_EXEC=0
+while IFS= read -r script; do
+  if [ ! -x "$script" ]; then
+    echo "  ❌ not executable: $script"
+    MISSING_EXEC=1
+  fi
+done < <(find "$ROOT/plugins" -name '*.sh' -o -name '*.py' 2>/dev/null)
+if [ "$MISSING_EXEC" -eq 0 ]; then
+  echo "  ✅ all scripts executable"
+fi
+
+echo ""
+if [ "$FAILED" -eq 0 ]; then
+  echo "✅ all checks passed"
+else
+  echo "❌ some checks failed"
+fi
+exit "$FAILED"