diff --git a/apps/desktop/extensions/ai-sidebar/background-helper.test.js b/apps/desktop/extensions/ai-sidebar/background-helper.test.js
index 6364fb2..a1601c4 100644
--- a/apps/desktop/extensions/ai-sidebar/background-helper.test.js
+++ b/apps/desktop/extensions/ai-sidebar/background-helper.test.js
@@ -20,8 +20,9 @@ describe('extension network helper requests', () => {
         onMessage: { addListener: (listener) => listeners.push(listener) },
         sendMessage: done(),
       },
-      storage: { local: storage(), session: storage() },
+      storage: { local: storage(), session: storage(), onChanged: { addListener: vi.fn() } },
       tabs: { onUpdated: { addListener: vi.fn() }, update: done() },
+      declarativeNetRequest: { updateSessionRules: done() },
       proxy: { settings: { set: done(), clear: done() } },
       privacy: { network: { webRTCIPHandlingPolicy: { set: done(), clear: done() } } },
     });
diff --git a/apps/desktop/extensions/ai-sidebar/background.js b/apps/desktop/extensions/ai-sidebar/background.js
index 75a8fac..e930a59 100644
--- a/apps/desktop/extensions/ai-sidebar/background.js
+++ b/apps/desktop/extensions/ai-sidebar/background.js
@@ -1,7 +1,7 @@
 import { decideInstallTarget, lookupInstalled } from './install-state.js';
 import { PIT_SOCKS_PORT, pitProxyConfig } from './pit-proxy.js';
 import { installPush } from './push-client.js';
-import { w3bsFromSearch } from './w3bs.js';
+import { PIT_DIRECT_RULES, w3bsFromSearch } from './w3bs.js';
 
 // Web Push through TronBrowser's configured push service (the engine has none).
 installPush();
@@ -9,11 +9,29 @@ installPush();
 // A w3bs:// URI typed in the address bar becomes a web search. w3bs-rules.json
 // redirects that search before it loads, but not when the omnibox serves it
 // from its search prefetch, so catch whatever a tab lands on as well.
-chrome.tabs.onUpdated.addListener((tabId, change) => {
-  const target = change.url && w3bsFromSearch(change.url);
+chrome.tabs.onUpdated.addListener(async (tabId, change) => {
+  if (!change.url || !/w3bs/i.test(change.url)) return;
+  const { pitEnabled } = await chrome.storage.local.get('pitEnabled');
+  const target = w3bsFromSearch(change.url, { pit: !!pitEnabled });
   if (target) chrome.tabs.update(tabId, { url: target }).catch(() => {});
 });
 
+// With Pit on, w3bs://chovy.hacker opens chovy.hacker itself instead of its
+// pit.world gateway. Session rules, kept in step with the toggle.
+async function syncW3bsPitRules() {
+  const { pitEnabled } = await chrome.storage.local.get('pitEnabled');
+  await chrome.declarativeNetRequest.updateSessionRules({
+    removeRuleIds: PIT_DIRECT_RULES.map((rule) => rule.id),
+    addRules: pitEnabled ? PIT_DIRECT_RULES : [],
+  });
+}
+syncW3bsPitRules().catch((err) => console.warn('w3bs pit rules:', err));
+chrome.storage.onChanged.addListener((changes, area) => {
+  if (area === 'local' && 'pitEnabled' in changes) {
+    syncW3bsPitRules().catch((err) => console.warn('w3bs pit rules:', err));
+  }
+});
+
 // Open the AI side panel when the toolbar action is clicked.
 chrome.sidePanel
   .setPanelBehavior({ openPanelOnActionClick: true })
diff --git a/apps/desktop/extensions/ai-sidebar/w3bs.js b/apps/desktop/extensions/ai-sidebar/w3bs.js
index 5d84ec7..f466d21 100644
--- a/apps/desktop/extensions/ai-sidebar/w3bs.js
+++ b/apps/desktop/extensions/ai-sidebar/w3bs.js
@@ -1,6 +1,9 @@
 // W3BS URIs (w3bs://type/namespace/name@version) open through the w3bs.org
 // resolver page: Chromium has no handler for the scheme. The launcher and the
-// w3bs-links.js content script use the same gateway.
+// w3bs-links.js content script use the same gateway. w3bs://chovy.hacker names
+// a site rather than a resource, and the resolver opens it at its pit.world
+// gateway; with Pit on, Moshpit names resolve in this browser, so it opens as
+// itself (PIT_DIRECT_RULES).
 export const W3BS_GATEWAY = 'https://w3bs.org/browse?q=';
 
 /** The resolver URL for a w3bs: URI, or null when `input` is not one. */
@@ -9,21 +12,53 @@ export function w3bsUrl(input) {
   return /^w3bs:/i.test(uri) ? W3BS_GATEWAY + encodeURIComponent(uri) : null;
 }
 
+/** https://chovy.hacker/path for w3bs://chovy.hacker/path (a dotted authority is a site); else null. */
+export function w3bsSiteUrl(input) {
+  const m = /^w3bs:\/\/([a-z0-9-]+(?:\.[a-z0-9-]+)+)(\/\S*)?$/i.exec(String(input ?? '').trim());
+  return m ? `https://${m[1].toLowerCase()}${m[2] || '/'}` : null;
+}
+
+/** Where a w3bs: URI opens: the site itself when Pit is on and it names one, else the resolver. */
+export function w3bsTarget(input, { pit = false } = {}) {
+  return (pit && w3bsSiteUrl(input)) || w3bsUrl(input);
+}
+
 /**
- * The resolver URL for a search results page whose query is a W3BS URI, or
- * null. Chromium searches a typed w3bs://chovy.hacker instead of opening it,
- * and when the omnibox serves that search from its prefetch the
- * declarativeNetRequest rule in w3bs-rules.json never sees a request, so the
- * background worker also checks every URL a tab lands on.
+ * Where to send a tab that landed on a search results page whose query is a
+ * W3BS URI (or, with Pit on, on the resolver page for a site), or null.
+ * Chromium searches a typed w3bs://chovy.hacker instead of opening it, and when
+ * the omnibox serves that search from its prefetch the declarativeNetRequest
+ * rules never see a request, so the background worker also checks every URL a
+ * tab lands on.
  */
-export function w3bsFromSearch(href) {
+export function w3bsFromSearch(href, { pit = false } = {}) {
   let url;
   try {
     url = new URL(href);
   } catch {
     return null;
   }
-  if (url.protocol !== 'https:' || url.hostname === 'w3bs.org') return null;
+  if (url.protocol !== 'https:') return null;
   const q = url.searchParams.get('q');
-  return q ? w3bsUrl(q) : null;
+  if (!q) return null;
+  if (url.hostname === 'w3bs.org') return pit && url.pathname === '/browse' ? w3bsSiteUrl(q) : null;
+  return w3bsTarget(q, { pit });
 }
+
+// Session rules while Pit is on: a search for w3bs://<name>, or the hop to
+// w3bs.org/browse it redirects to, goes straight to https://<name>/. Higher
+// priority than w3bs-rules.json, which sends every w3bs:// search to w3bs.org.
+// A path is left to the resolver: the rule cannot percent-decode it.
+export const PIT_DIRECT_RULES = [
+  {
+    id: 101,
+    priority: 2,
+    action: { type: 'redirect', redirect: { regexSubstitution: 'https://\\1/' } },
+    condition: {
+      regexFilter:
+        '^https://[^/]+/[^?#]*\\?(?:[^#]*&)?q=w3bs(?:%3A|:)(?:%2F|/){2}([a-z0-9-]+(?:\\.[a-z0-9-]+)+)(?:%2F|/)?(?:[&#].*)?$',
+      isUrlFilterCaseSensitive: false,
+      resourceTypes: ['main_frame'],
+    },
+  },
+];
diff --git a/apps/desktop/extensions/ai-sidebar/w3bs.test.js b/apps/desktop/extensions/ai-sidebar/w3bs.test.js
index 301861c..ec8a272 100644
--- a/apps/desktop/extensions/ai-sidebar/w3bs.test.js
+++ b/apps/desktop/extensions/ai-sidebar/w3bs.test.js
@@ -1,5 +1,5 @@
 import { describe, expect, it } from 'vitest';
-import { w3bsFromSearch, w3bsUrl } from './w3bs.js';
+import { PIT_DIRECT_RULES, w3bsFromSearch, w3bsSiteUrl, w3bsUrl } from './w3bs.js';
 
 describe('w3bsUrl', () => {
   it('sends a W3BS URI to the w3bs.org resolver', () => {
@@ -37,4 +37,49 @@ describe('w3bsFromSearch', () => {
     expect(w3bsFromSearch('chrome://newtab/')).toBeNull();
     expect(w3bsFromSearch('not a url')).toBeNull();
   });
+
+  it('with Pit on, opens a named site itself, from the search or the resolver hop', () => {
+    const pit = { pit: true };
+    expect(w3bsFromSearch('https://pit.world/search?q=w3bs%3A%2F%2Fchovy.hacker', pit)).toBe('https://chovy.hacker/');
+    expect(w3bsFromSearch('https://w3bs.org/browse?q=w3bs%3A%2F%2FChovy.Hacker%2Fblog', pit)).toBe(
+      'https://chovy.hacker/blog',
+    );
+    // Resources still go to the resolver; w3bs.org pages that are not a site stay put.
+    expect(w3bsFromSearch('https://pit.world/search?q=w3bs%3A%2F%2Fprompt%2Fw3bs%2Fresearch', pit)).toBe(
+      'https://w3bs.org/browse?q=w3bs%3A%2F%2Fprompt%2Fw3bs%2Fresearch',
+    );
+    expect(w3bsFromSearch('https://w3bs.org/browse?q=w3bs%3A%2F%2Fprompt%2Fw3bs%2Fresearch', pit)).toBeNull();
+  });
+});
+
+describe('w3bsSiteUrl', () => {
+  it('reads a dotted authority as a site, and nothing else', () => {
+    expect(w3bsSiteUrl('w3bs://chovy.hacker')).toBe('https://chovy.hacker/');
+    expect(w3bsSiteUrl('w3bs://example.com/a?b=1')).toBe('https://example.com/a?b=1');
+    expect(w3bsSiteUrl('w3bs://prompt/w3bs/research@1')).toBeNull();
+    expect(w3bsSiteUrl('https://chovy.hacker')).toBeNull();
+  });
+});
+
+describe('PIT_DIRECT_RULES', () => {
+  // Chromium's regexFilter is RE2; this pattern is plain enough to read the same in JS.
+  const rule = PIT_DIRECT_RULES[0];
+  const re = new RegExp(rule.condition.regexFilter, 'i');
+  const apply = (href) => {
+    const m = re.exec(href);
+    return m ? rule.action.redirect.regexSubstitution.replace('\\1', m[1]) : null;
+  };
+
+  it('sends a w3bs://<name> search, or its resolver hop, to the name itself', () => {
+    expect(apply('https://pit.world/search?q=w3bs%3A%2F%2Fchovy.hacker')).toBe('https://chovy.hacker/');
+    expect(apply('https://duckduckgo.com/?q=w3bs%3A%2F%2Fchovy.hacker&ia=web')).toBe('https://chovy.hacker/');
+    expect(apply('https://w3bs.org/browse?q=w3bs%3A%2F%2Fchovy.hacker')).toBe('https://chovy.hacker/');
+    expect(apply('https://w3bs.org/browse?q=w3bs://chovy.hacker')).toBe('https://chovy.hacker/');
+  });
+
+  it('leaves resources, paths and other searches to the resolver', () => {
+    expect(apply('https://pit.world/search?q=w3bs%3A%2F%2Fprompt%2Fw3bs%2Fresearch')).toBeNull();
+    expect(apply('https://pit.world/search?q=w3bs%3A%2F%2Fchovy.hacker%2Fblog')).toBeNull();
+    expect(apply('https://pit.world/search?q=chovy.hacker')).toBeNull();
+  });
 });