diff --git a/ui-electrobun/src/mainview/health-store.svelte.ts b/ui-electrobun/src/mainview/health-store.svelte.ts
index 5327b7d..9de7687 100644
--- a/ui-electrobun/src/mainview/health-store.svelte.ts
+++ b/ui-electrobun/src/mainview/health-store.svelte.ts
@@ -32,18 +32,36 @@ const DEFAULT_CONTEXT_LIMIT = 200_000;
 
 // ── Internal state ───────────────────────────────────────────────────────────
 
+// Feature 10: Per-tool tracking entry
+interface ToolEntry {
+  startTime: number;
+  count: number;
+}
+
+// Feature 10: Tool duration histogram entry
+interface ToolHistogramEntry {
+  toolName: string;
+  totalMs: number;
+  count: number;
+}
+
 interface ProjectTracker {
   projectId: string;
   lastActivityTs: number;
   lastToolName: string | null;
   // Fix #8 (Codex audit): Counter instead of boolean for concurrent tools
   toolsInFlight: number;
+  // Feature 10: Per-tool tracking map
+  activeToolMap: Map<string, ToolEntry>;
   costSnapshots: Array<[number, number]>; // [timestamp, costUsd]
   totalTokens: number;
   totalCost: number;
   status: 'inactive' | 'running' | 'idle' | 'done' | 'error';
 }
 
+// Feature 10: Global tool duration histogram (across all projects)
+const toolDurationHistogram = new Map<string, ToolHistogramEntry>();
+
 let trackers = $state<Map<string, ProjectTracker>>(new Map());
 let tickTs = $state<number>(Date.now());
 let tickInterval: ReturnType<typeof setInterval> | null = null;
diff --git a/ui-electrobun/src/mainview/plugin-host.ts b/ui-electrobun/src/mainview/plugin-host.ts
index c4d56a1..878b78c 100644
--- a/ui-electrobun/src/mainview/plugin-host.ts
+++ b/ui-electrobun/src/mainview/plugin-host.ts
@@ -18,6 +18,12 @@ export interface PluginMeta {
   description: string;
   main: string;
   permissions: string[];
+  /** Feature 9: Allowed network origins for fetch-like operations. */
+  allowedOrigins?: string[];
+  /** Feature 9: Max runtime in seconds (CPU time quota). Default 30. */
+  maxRuntime?: number;
+  /** Feature 9: Max memory display hint (bytes, informational only). */
+  maxMemory?: number;
 }
 
 interface LoadedPlugin {
@@ -104,6 +110,27 @@ self.onmessage = function(e) {
       };
     }
 
+    if (permissions.includes('network')) {
+      api.network = {
+        fetch(url, options) {
+          // Check against allowedOrigins
+          const allowedOrigins = msg.allowedOrigins || [];
+          if (allowedOrigins.length > 0) {
+            try {
+              const parsed = new URL(url);
+              const origin = parsed.origin;
+              if (!allowedOrigins.some(o => origin === o || parsed.hostname.endsWith(o))) {
+                return Promise.reject(new Error('Origin not in allowedOrigins: ' + origin));
+              }
+            } catch (e) {
+              return Promise.reject(new Error('Invalid URL: ' + url));
+            }
+          }
+          return _rpc('network.fetch', { url, options });
+        },
+      };
+    }
+
     if (permissions.includes('events')) {
       api.events = {
         on(event, callback) {
@@ -173,13 +200,16 @@ export async function loadPlugin(meta: PluginMeta): Promise<void> {
   }
 
   // Validate permissions
-  const validPerms = new Set(['palette', 'notifications', 'messages', 'events']);
+  const validPerms = new Set(['palette', 'notifications', 'messages', 'events', 'network']);
   for (const p of meta.permissions) {
     if (!validPerms.has(p)) {
       throw new Error(`Plugin '${meta.id}' requests unknown permission: ${p}`);
     }
   }
 
+  // Feature 9: Validate allowedOrigins
+  const maxRuntime = (meta.maxRuntime ?? 30) * 1000; // default 30s, convert to ms
+
   // Read plugin code via RPC
   let code: string;
   try {
@@ -253,11 +283,22 @@ export async function loadPlugin(meta: PluginMeta): Promise<void> {
       type: 'init',
       code,
       permissions: meta.permissions,
+      allowedOrigins: meta.allowedOrigins ?? [],
       meta: { id: meta.id, name: meta.name, version: meta.version, description: meta.description },
     });
   });
 
+  // Feature 9: maxRuntime — terminate Worker after timeout
+  let runtimeTimer: ReturnType<typeof setTimeout> | null = null;
+  if (maxRuntime > 0) {
+    runtimeTimer = setTimeout(() => {
+      console.warn(`Plugin '${meta.id}' exceeded maxRuntime (${maxRuntime}ms), terminating`);
+      unloadPlugin(meta.id);
+    }, maxRuntime);
+  }
+
   const cleanup = () => {
+    if (runtimeTimer) clearTimeout(runtimeTimer);
     commandRemover?.(meta.id);
     for (const sub of eventSubscriptions) eventBus?.off(sub.event, sub.handler);
     eventSubscriptions.length = 0;