diff --git a/static/cortex-os/runtime-health/runtime_health.css b/static/cortex-os/runtime-health/runtime_health.css
index 9bd83de..4370190 100644
--- a/static/cortex-os/runtime-health/runtime_health.css
+++ b/static/cortex-os/runtime-health/runtime_health.css
@@ -74,3 +74,36 @@ main.main:not(.svrnty-showing-cortex-os) .cortex-os-runtime-health {
 .cortex-os-runtime-health__signals dd {
   font-weight: 700;
 }
+
+.cortex-os-runtime-health__details {
+  border-top: 1px solid rgba(19, 82, 121, 0.14);
+  display: grid;
+  gap: 10px;
+  margin-top: 12px;
+  padding-top: 12px;
+}
+
+.cortex-os-runtime-health__detail-group h3 {
+  margin: 0 0 4px;
+  font-size: 12px;
+  font-weight: 700;
+  text-transform: uppercase;
+}
+
+.cortex-os-runtime-health__detail-list {
+  display: grid;
+  grid-template-columns: minmax(116px, 0.8fr) minmax(0, 1.2fr);
+  gap: 4px 10px;
+  margin: 0;
+}
+
+.cortex-os-runtime-health__detail-list dt,
+.cortex-os-runtime-health__detail-list dd {
+  margin: 0;
+  min-width: 0;
+  overflow-wrap: anywhere;
+}
+
+.cortex-os-runtime-health__detail-list dt {
+  color: #44515f;
+}
diff --git a/static/cortex-os/runtime-health/runtime_health.js b/static/cortex-os/runtime-health/runtime_health.js
index 7e16b18..1431616 100644
--- a/static/cortex-os/runtime-health/runtime_health.js
+++ b/static/cortex-os/runtime-health/runtime_health.js
@@ -38,10 +38,15 @@
     list.className = "cortex-os-runtime-health__signals";
     list.setAttribute("data-role", "signals");
 
+    var details = document.createElement("section");
+    details.className = "cortex-os-runtime-health__details";
+    details.setAttribute("data-role", "details");
+
     panel.appendChild(title);
     panel.appendChild(badge);
     panel.appendChild(summary);
     panel.appendChild(list);
+    panel.appendChild(details);
 
     var target = document.querySelector("main.main");
     if (!target) {
@@ -51,13 +56,14 @@
     return panel;
   }
 
-  function setState(panel, state, headline, detail, signals) {
+  function setState(panel, state, headline, detail, signals, payloadDetails) {
     var nextState = states.indexOf(state) >= 0 ? state : "unknown";
     panel.setAttribute("data-state", nextState);
     panel.querySelector("[data-role='headline']").textContent = headline || "Runtime Health";
     panel.querySelector("[data-role='status']").textContent = nextState;
     panel.querySelector("[data-role='summary']").textContent = detail || "redacted";
     renderSignals(panel.querySelector("[data-role='signals']"), signals || []);
+    renderDetails(panel.querySelector("[data-role='details']"), payloadDetails || {});
   }
 
   function renderSignals(list, signals) {
@@ -75,6 +81,69 @@
     });
   }
 
+  function renderKeyValues(container, title, rows) {
+    var group = document.createElement("section");
+    group.className = "cortex-os-runtime-health__detail-group";
+
+    var heading = document.createElement("h3");
+    heading.textContent = title;
+    group.appendChild(heading);
+
+    var list = document.createElement("dl");
+    list.className = "cortex-os-runtime-health__detail-list";
+    rows.forEach(function (row) {
+      var key = document.createElement("dt");
+      var value = document.createElement("dd");
+      key.textContent = row.key || "redacted";
+      value.textContent = row.value || "redacted";
+      list.appendChild(key);
+      list.appendChild(value);
+    });
+    group.appendChild(list);
+    container.appendChild(group);
+  }
+
+  function renderDetails(container, detail) {
+    container.textContent = "";
+    var signals = detail.signals || [];
+    var warnings = detail.warnings || [];
+    var redactions = detail.redactions || [];
+    var sourceTrace = detail.source_trace || [];
+    var authority = detail.authority || {};
+    var allAuthorityDenied = Object.keys(authority).every(function (key) {
+      return authority[key] === false;
+    });
+
+    renderKeyValues(container, "Signals", signals.slice(0, 3).map(function (signal) {
+      return {
+        key: signal.signal_id || "redacted",
+        value: (signal.state || "unknown") + " | " + (signal.redacted ? "redacted" : "visible") + " | " + (signal.summary || "redacted")
+      };
+    }));
+    renderKeyValues(container, "Warnings", warnings.slice(0, 3).map(function (warning) {
+      return {
+        key: warning.code || "redacted",
+        value: warning.message || "redacted"
+      };
+    }));
+    renderKeyValues(container, "Redactions", redactions.slice(0, 4).map(function (redaction) {
+      return {
+        key: redaction.reason_code || "redacted",
+        value: redaction.label || "redacted"
+      };
+    }));
+    renderKeyValues(container, "Source Trace", sourceTrace.slice(0, 3).map(function (source) {
+      return {
+        key: source.source_kind || "redacted",
+        value: source.label || "redacted"
+      };
+    }));
+    renderKeyValues(container, "Authority", [{
+      key: "all denied",
+      value: allAuthorityDenied ? "true" : "review required"
+    }]);
+  }
+
   function renderPayload(panel, payload) {
     if (!payload || payload.ok !== true || !payload.result) {
       setState(panel, "error", "Runtime Health is unavailable.", "Runtime Health is unavailable.", []);
@@ -87,6 +156,13 @@
       displaySummary.headline,
       displaySummary.detail,
       payload.result.signals,
+      {
+        signals: payload.result.signals,
+        warnings: payload.result.warnings,
+        redactions: payload.result.redactions,
+        source_trace: payload.result.source_trace,
+        authority: payload.result.authority
+      }
     );
   }
 
diff --git a/tests/unit/test_cortex_os_runtime_health_static.py b/tests/unit/test_cortex_os_runtime_health_static.py
index c2caf13..dcbb9e1 100644
--- a/tests/unit/test_cortex_os_runtime_health_static.py
+++ b/tests/unit/test_cortex_os_runtime_health_static.py
@@ -33,6 +33,10 @@ def test_runtime_health_display_has_no_hidden_write_surface():
         "window.open",
         "eval(",
         "new Function",
+        "JSON.stringify",
+        "Object.keys(payload",
+        "Object.entries(payload",
+        "clipboard",
         "innerHTML",
         "insertAdjacentHTML",
         "outerHTML",
@@ -85,6 +89,10 @@ def test_runtime_health_display_consumes_canonical_envelope_only():
         "signal.signal_id",
         "signal.state",
         "signal.summary",
+        "payload.result.warnings",
+        "payload.result.redactions",
+        "payload.result.source_trace",
+        "payload.result.authority",
     ]:
         assert snippet in js
     for forbidden in [
@@ -101,3 +109,30 @@ def test_runtime_health_display_consumes_canonical_envelope_only():
         "authority.delegated_memory_grant",
     ]:
         assert forbidden not in js
+
+
+def test_runtime_health_detail_surface_is_bounded_and_text_only():
+    js = JS.read_text(encoding="utf-8")
+    css = CSS.read_text(encoding="utf-8")
+
+    for snippet in [
+        'details.setAttribute("data-role", "details")',
+        "renderDetails(",
+        "renderKeyValues(",
+        "signals.slice(0, 3)",
+        "warnings.slice(0, 3)",
+        "redactions.slice(0, 4)",
+        "sourceTrace.slice(0, 3)",
+        "allAuthorityDenied",
+        ".every(function (key)",
+        "textContent",
+    ]:
+        assert snippet in js
+    for snippet in [
+        ".cortex-os-runtime-health__details",
+        ".cortex-os-runtime-health__detail-group",
+        ".cortex-os-runtime-health__detail-list",
+    ]:
+        assert snippet in css
+    for forbidden in ["body {", "main {", "#app", ".panel"]:
+        assert forbidden not in css