diff --git a/static/svrnty_nav.js b/static/svrnty_nav.js
index 5729cf5..bb229c7 100644
--- a/static/svrnty_nav.js
+++ b/static/svrnty_nav.js
@@ -1,4 +1,4 @@
-// svrnty_nav.js — injects Adwright + BTE sidebar buttons into hermes-webui's
+// svrnty_nav.js — injects Svrnty sidebar buttons into hermes-webui's
 // .sidebar-nav and wraps switchPanel so our panels participate in the existing
 // main-view show/hide system (showing-<name> on <main>).
 //
@@ -22,10 +22,19 @@
       '<circle cx="12" cy="12" r="10"/><circle cx="12" cy="12" r="6"/><circle cx="12" cy="12" r="2"/>',
     bte:
       '<path d="M12 2l1.8 5.6L19.4 9.4l-4.5 3.3 1.7 5.7L12 15l-4.6 3.4 1.7-5.7L4.6 9.4l5.6-1.8L12 2z"/>',
+    graph:
+      '<circle cx="5" cy="12" r="2"/><circle cx="12" cy="5" r="2"/><circle cx="19" cy="12" r="2"/><circle cx="12" cy="19" r="2"/><path d="M6.7 10.6l3.9-4"/><path d="M13.4 6.6l3.9 4"/><path d="M17.3 13.4l-3.9 4"/><path d="M10.6 17.4l-3.9-4"/><path d="M7 12h10"/>',
   };
   const TABS = [
     { id: "adwright", label: "Adwright", tooltip: "Adwright — marketing intelligence" },
     { id: "bte",      label: "BTE",      tooltip: "BTE — brand creative studio" },
+    {
+      id: "project-graph",
+      label: "Project Graph",
+      tooltip: "Project Graph — open workspace graph",
+      href: "/plugins/svrnty/umbrella.html",
+      icon: "graph",
+    },
   ];
 
   function _svg(iconPath, size, stroke) {
@@ -72,9 +81,13 @@
           btn.setAttribute("data-label", t.label);
           btn.setAttribute("data-tooltip", t.tooltip);
           btn.setAttribute("aria-label", t.label);
-          btn.innerHTML = _svg(ICONS[t.id], c.size, c.stroke);
+          btn.innerHTML = _svg(ICONS[t.icon || t.id], c.size, c.stroke);
           btn.addEventListener("click", () => {
             LOG("clicked:", t.id);
+            if (t.href) {
+              window.open(t.href, "_blank", "noopener,noreferrer");
+              return;
+            }
             if (typeof window.switchPanel === "function") {
               window.switchPanel(t.id, { fromRailClick: true });
             } else {
@@ -103,7 +116,7 @@
     if (typeof window.switchPanel !== "function") return false;
     if (window.switchPanel.__svrntyWrapped) return true;
     const original = window.switchPanel;
-    const OUR_IDS = TABS.map((t) => t.id);
+    const OUR_IDS = TABS.filter((t) => !t.href).map((t) => t.id);
 
     async function wrapped(name, opts) {
       const result = await original(name, opts);
diff --git a/tests/unit/test_svrnty_nav_js.py b/tests/unit/test_svrnty_nav_js.py
new file mode 100644
index 0000000..67237c7
--- /dev/null
+++ b/tests/unit/test_svrnty_nav_js.py
@@ -0,0 +1,17 @@
+"""Static checks for the Svrnty sidebar navigation injection."""
+
+from pathlib import Path
+
+NAV_JS = Path(__file__).resolve().parents[2] / "static" / "svrnty_nav.js"
+
+
+def test_project_graph_nav_opens_umbrella_page_in_new_tab():
+    src = NAV_JS.read_text()
+    assert "Project Graph" in src
+    assert "/plugins/svrnty/umbrella.html" in src
+    assert 'window.open(t.href, "_blank", "noopener,noreferrer")' in src
+
+
+def test_project_graph_does_not_participate_in_panel_switching():
+    src = NAV_JS.read_text()
+    assert "TABS.filter((t) => !t.href).map((t) => t.id)" in src