diff --git a/frontend/packages/dashboard/src/builds.js b/frontend/packages/dashboard/src/builds.js
index 3d719914..1e8daa96 100644
--- a/frontend/packages/dashboard/src/builds.js
+++ b/frontend/packages/dashboard/src/builds.js
@@ -794,7 +794,14 @@ async function init() {
 
   await refreshState();
 
-  const es = openStream('/api/dashboard/stream');
+  // kinds= matches SSE_HANDLERS below verbatim — narrows this from all
+  // 17 wire kinds down to the 3 this page acts on. This page was one
+  // of 4 unfiltered `/api/dashboard/stream` subscribers before this
+  // (subscription discipline, part 1 of the dashboard-event-stream-
+  // split issue).
+  const es = openStream(
+    '/api/dashboard/stream?kinds=rebuild_queue_changed,meta_inputs_changed,meta_update_running',
+  );
   if (es) {
     es.onmessage = (e) => {
       let ev;
diff --git a/frontend/packages/dashboard/src/core.js b/frontend/packages/dashboard/src/core.js
index 7a4c467d..3a454aca 100644
--- a/frontend/packages/dashboard/src/core.js
+++ b/frontend/packages/dashboard/src/core.js
@@ -509,7 +509,15 @@ async function init() {
 
   await refreshState();
 
-  const es = openStream('/api/dashboard/stream');
+  // kinds= matches SSE_HANDLERS below verbatim — narrows this from all
+  // 17 wire kinds down to the 4 this page acts on. This page was one
+  // of 4 unfiltered `/api/dashboard/stream` subscribers before this
+  // (subscription discipline, part 1 of the dashboard-event-stream-
+  // split issue).
+  const es = openStream(
+    '/api/dashboard/stream?kinds=tombstones_changed,container_state_changed,' +
+      'capabilities_changed,tool_groups_changed',
+  );
   if (es) {
     es.onmessage = (e) => {
       let ev;
diff --git a/frontend/packages/dashboard/src/logs.js b/frontend/packages/dashboard/src/logs.js
index 3d377b30..81e081ad 100644
--- a/frontend/packages/dashboard/src/logs.js
+++ b/frontend/packages/dashboard/src/logs.js
@@ -384,8 +384,12 @@ import '@hive/shared/hive-tab-strip.js';
   loadContainerLists();
 
   // Subscribe to the dashboard SSE stream for audit live-appends.
+  // kinds= narrows this from all 17 wire kinds down to the 1 this page
+  // acts on. This page was one of 4 unfiltered `/api/dashboard/stream`
+  // subscribers before this (subscription discipline, part 1 of the
+  // dashboard-event-stream-split issue).
   {
-    const es = openStream('/api/dashboard/stream');
+    const es = openStream('/api/dashboard/stream?kinds=audit_entry_added');
     if (es) {
       es.onmessage = (e) => {
         let ev;
diff --git a/frontend/packages/dashboard/src/tabs.js b/frontend/packages/dashboard/src/tabs.js
index 9b2af49c..ab079b78 100644
--- a/frontend/packages/dashboard/src/tabs.js
+++ b/frontend/packages/dashboard/src/tabs.js
@@ -314,12 +314,25 @@ window.marked = marked;
     tool_groups_changed:     applyToolGroupsChanged,
   };
   (function bindDashboardStream() {
-    // Route through the SharedWorker so all open hyperhive tabs share
-    // one upstream SSE connection — see docs/web-ui.md (SSE multiplexing
-    // paragraph) for the design + Firefox throttling motivation.
-    // `openStream` returns an EventSource-shaped facade with a graceful
-    // direct-EventSource fallback when SharedWorker isn't supported.
-    const es = openStream('/api/dashboard/stream');
+    // Route through the SharedWorker so all open hyperhive tabs on the
+    // SAME kinds= filter share one upstream SSE connection — see
+    // docs/web-ui/shape.md (SSE multiplexing paragraph) for the design
+    // + Firefox throttling motivation. `openStream` returns an
+    // EventSource-shaped facade with a graceful direct-EventSource
+    // fallback when SharedWorker isn't supported.
+    //
+    // kinds= matches MUTATION_HANDLERS below verbatim, plus `sent`
+    // (checked separately, just above, for the operator inbox) —
+    // narrows this from all 17 wire kinds down to the 13 this page
+    // actually acts on. This page was one of 4 unfiltered
+    // `/api/dashboard/stream` subscribers before this (subscription
+    // discipline, part 1 of the dashboard-event-stream-split issue).
+    const es = openStream(
+      '/api/dashboard/stream?kinds=sent,approval_added,approval_resolved,' +
+        'question_added,question_resolved,transient_set,transient_cleared,' +
+        'container_state_changed,container_removed,rebuild_queue_changed,' +
+        'schedules_changed,capabilities_changed,tool_groups_changed',
+    );
     es.onmessage = (e) => {
       let ev;
       try { ev = JSON.parse(e.data); } catch { return; }