diff --git a/docs/web-ui/dashboard.md b/docs/web-ui/dashboard.md
index ae22d0b3..a8cfaff2 100644
--- a/docs/web-ui/dashboard.md
+++ b/docs/web-ui/dashboard.md
@@ -622,9 +622,10 @@ frontend reads.
 
 Operator-local preferences. State lives in the browser's
 `localStorage` — preferences do NOT sync between devices and
-do NOT survive a profile wipe. Two sections today (browser
-notifications, agent terminal); future preferences (theme, density,
-etc.) land here as sibling `<h3>` blocks in `settings.html`.
+do NOT survive a profile wipe. Today the tab holds one section
+(browser notifications); future preferences (theme, density,
+etc.) land here as sibling `<h3>` blocks
+under the same `<section id="tab-pane-settings">`.
 
 **◇ browser notifications** — `🔔 enable notifications` button when
 permission ungranted; `🔕 mute / 🔔 unmute` toggle once granted
@@ -635,19 +636,6 @@ single status line explains why. See `### Browser notifications`
 below for the dispatch model + the three signals the dashboard
 emits OS notifications on.
 
-**◇ agent terminal** — a single `☐/☑ expand tool output panels`
-toggle button (`role="switch"`, live `aria-checked`). Controls whether
-every per-agent page's terminal defaults otherwise-collapsed
-`<details>` rows (long tool-results, Write/Edit diffs, …) open; rows
-that already default open regardless (send/ask/answer/recv) are
-unaffected either way. Pure client-side — the key + get/set live in
-`@hive/shared/prefs.js` (`getExpandDetailsPref`/`setExpandDetailsPref`)
-so this page and every agent page's `app.js` read/write the exact same
-`localStorage` key without a backend field; the shared terminal
-factory reads it live via its `expandDetails` option (see
-docs/web-ui/shape.md::Shared terminal pane), so a change here applies
-to any already-open agent tab's next rendered row without a reload.
-
 The FL0W page does NOT host this pane — settings live only on the
 dashboard's S3TT1NGS tab (reach it via the FL0W page's `← home`
 back-link → Dashboard). Notifications still fire on the FL0W page when
diff --git a/docs/web-ui/shape.md b/docs/web-ui/shape.md
index 0de8445c..bd657f15 100644
--- a/docs/web-ui/shape.md
+++ b/docs/web-ui/shape.md
@@ -115,11 +115,7 @@ event picture), `onBackfillDone?(count)` (one-shot after replay; `count=0` on
 failed/skipped fetch), `onStreamOpen?()` (fires on every EventSource
 (re)connect — use to re-sync snapshot-derived state after a reconnect gap),
 `pillAnchor?` (parent element for the "↓ N new" pill; defaults to
-`logEl.parentElement`), `expandDetails?` (boolean or zero-arg function
-returning one, re-read on every `api.details`/`api.detailsDiff` call rather
-than captured once — lets a page default otherwise-collapsed panels open
-per a live browser-local preference; renderers that force a row open
-regardless, e.g. message-bearing tool_use, are unaffected either way).
+`logEl.parentElement`).
 
 **Sticky-bottom + snap animation.** `stickToBottom` is the
 operator's intent: true means "keep snapping to bottom on every
diff --git a/frontend/packages/agent/src/app.js b/frontend/packages/agent/src/app.js
index 94661e0e..33e0af8c 100644
--- a/frontend/packages/agent/src/app.js
+++ b/frontend/packages/agent/src/app.js
@@ -6,7 +6,6 @@ import { create as termCreate, linkify as termLinkify } from '@hive/shared/termi
 import { asyncBtn, bindAsyncForms } from '@hive/shared/forms.js';
 import { themedConfirm } from '@hive/shared/modal.js';
 import { el } from '@hive/shared/dom.js';
-import { getExpandDetailsPref } from '@hive/shared/prefs.js';
 import '@hive/shared/side-panel.js'; // registers <hive-side-panel> — side-effect import
 import { marked } from 'marked';
 import DOMPurify from 'dompurify';
@@ -1614,9 +1613,6 @@ window.marked = marked;
       // (e.g. /agent/<name>/) still hits the right SSE upstream.
       historyUrl: 'events/history',
       streamUrl: 'events/stream',
-      // Re-read live (not captured once) so flipping the overflow-menu
-      // toggle mid-session affects the next rendered row immediately.
-      expandDetails: () => getExpandDetailsPref(),
       renderers: {
         turn_start(ev, api) {
           if (api.fromHistory) openTurnsFromHistory += 1;
diff --git a/frontend/packages/dashboard/src/settings.html b/frontend/packages/dashboard/src/settings.html
index 7fd6ed28..1f98dfec 100644
--- a/frontend/packages/dashboard/src/settings.html
+++ b/frontend/packages/dashboard/src/settings.html
@@ -31,12 +31,6 @@
       <button type="button" id="notif-unmute" class="btn btn-notif" hidden>🔔 unmute</button>
       <span id="notif-status" class="meta" hidden></span>
     </div>
-
-    <h3>◇ agent terminal</h3>
-    <p class="meta">applies to every agent's terminal viewed in this browser — whether otherwise-collapsed tool-output panels (long results, Write/Edit diffs, …) default open. rows that already default open (send/ask/answer/recv) are unaffected either way.</p>
-    <div id="verbosity-row" class="notif-row">
-      <button type="button" id="expand-details-toggle" class="btn btn-notif" role="switch"></button>
-    </div>
   </main>
 
   <script type="module" src="/static/settings.js" defer></script>
diff --git a/frontend/packages/dashboard/src/settings.js b/frontend/packages/dashboard/src/settings.js
index 3a4f4a6e..c6d5fc29 100644
--- a/frontend/packages/dashboard/src/settings.js
+++ b/frontend/packages/dashboard/src/settings.js
@@ -1,37 +1,15 @@
 // /settings.html — operator-local preferences page.
 //
-// Extracted from the dashboard S3TT1NGS tab. The browser-notification
-// toggle: NOTIF.bind() wires the enable / mute / unmute buttons and
-// persists state to localStorage. The dashboard's NOTIF.show() calls
-// (approvals / questions) read that same localStorage state + the
-// browser-level permission, so firing still works from the dashboard
-// even though the toggle UI now lives on its own page.
-//
-// The agent-terminal-verbosity toggle below is a second, unrelated
-// browser-local preference — @hive/shared/prefs.js owns the key name +
-// get/set so this page and every per-agent page's app.js agree on it
-// without a backend field. Both preferences are per-origin localStorage,
-// so they only apply within this browser (per the page's own copy).
+// Extracted from the dashboard S3TT1NGS tab. Today the only setting is
+// the browser-notification toggle: NOTIF.bind() wires the enable / mute /
+// unmute buttons and persists state to localStorage. The dashboard's
+// NOTIF.show() calls (approvals / questions) read that same localStorage
+// state + the browser-level permission, so firing still works from the
+// dashboard even though the toggle UI now lives on its own page.
 //
 // initServerWarnings() renders the shared top-of-page warnings banner,
 // matching the other stand-alone pages (FL0W / L0GS / H0M3).
 import { NOTIF, initServerWarnings } from './common.js';
-import { getExpandDetailsPref, setExpandDetailsPref } from '@hive/shared/prefs.js';
 
 initServerWarnings();
 NOTIF.bind();
-
-(function bindExpandDetailsToggle() {
-  const btn = document.getElementById('expand-details-toggle');
-  if (!btn) return;
-  function render() {
-    const on = getExpandDetailsPref();
-    btn.textContent = on ? '☑ expand tool output panels' : '☐ expand tool output panels';
-    btn.setAttribute('aria-checked', String(on));
-  }
-  btn.addEventListener('click', () => {
-    setExpandDetailsPref(!getExpandDetailsPref());
-    render();
-  });
-  render();
-})();
diff --git a/frontend/packages/shared/package.json b/frontend/packages/shared/package.json
index 5134f006..b0dde490 100644
--- a/frontend/packages/shared/package.json
+++ b/frontend/packages/shared/package.json
@@ -17,7 +17,6 @@
     "./terminal.css": "./src/terminal/terminal.css",
     "./chrome.css": "./src/chrome.css",
     "./forms.js": "./src/forms.js",
-    "./prefs.js": "./src/prefs.js",
     "./dom.js": "./src/dom.js",
     "./modal.js": "./src/modal.js",
     "./shadow-css.js": "./src/shadow-css.js",
diff --git a/frontend/packages/shared/src/prefs.js b/frontend/packages/shared/src/prefs.js
deleted file mode 100644
index f73fb005..00000000
--- a/frontend/packages/shared/src/prefs.js
+++ /dev/null
@@ -1,27 +0,0 @@
-// Tiny browser-local (localStorage) preference helpers shared by the
-// dashboard's /settings.html and the per-agent page — both need the
-// exact same key name to actually talk to each other via the browser's
-// shared per-origin storage (settings.html is where the operator sets
-// the preference; every per-agent page's terminal reads it), so the
-// get/set pair — and the key itself — live here once rather than as
-// independent copies in each package that could drift out of sync.
-
-const EXPAND_DETAILS_KEY = 'hive-agent-expand-details';
-
-// Whether a per-agent terminal's otherwise-collapsed `<details>` panels
-// (long tool-results, Write/Edit diffs, …) should default open. Pure
-// client-side — no backend field, nothing round-trips through
-// `/api/*`. Read live (not cached) by the shared terminal factory's
-// `expandDetails` option — see docs/web-ui/shape.md::Shared terminal
-// pane — so a preference change on /settings.html applies to the next
-// rendered row in any already-open agent tab without a reload.
-export function getExpandDetailsPref() {
-  try { return localStorage.getItem(EXPAND_DETAILS_KEY) === '1'; }
-  catch { return false; }
-}
-export function setExpandDetailsPref(v) {
-  try {
-    if (v) localStorage.setItem(EXPAND_DETAILS_KEY, '1');
-    else localStorage.removeItem(EXPAND_DETAILS_KEY);
-  } catch { /* localStorage unavailable — preference is session-only */ }
-}
diff --git a/frontend/packages/shared/src/terminal/terminal.js b/frontend/packages/shared/src/terminal/terminal.js
index 5830e0cb..e00a55cd 100644
--- a/frontend/packages/shared/src/terminal/terminal.js
+++ b/frontend/packages/shared/src/terminal/terminal.js
@@ -231,23 +231,11 @@ export function create(opts) {
     afterAppend(wasNearBottom);
     return [e, tn];
   }
-  // `opts.expandDetails` (boolean or zero-arg function returning one) lets
-  // the caller default every otherwise-collapsed `<details>` row open —
-  // e.g. an "expand panels by default" browser-local preference. Read
-  // live (not captured once) so a mid-session preference flip takes
-  // effect on the next row without recreating the terminal. Renderers
-  // that need a row open regardless (message-bearing tool_use/tool_result)
-  // already set `d.open = true` themselves after calling this — this only
-  // changes the *default* for panels that would otherwise start closed.
-  function wantsExpandedDefault() {
-    return typeof opts.expandDetails === 'function' ? !!opts.expandDetails() : !!opts.expandDetails;
-  }
   function details(cls, summary, body, icon) {
     clearPlaceholder();
     const wasNearBottom = isNearBottom();
     const d = document.createElement('details');
     d.className = 'row ' + (cls || '') + (currentNoAnim ? ' no-anim' : '');
-    if (wantsExpandedDefault()) d.open = true;
     d.appendChild(buildSummary(summary, icon));
     const pre = document.createElement('pre');
     pre.className = 'tool-body';
@@ -262,7 +250,6 @@ export function create(opts) {
     const wasNearBottom = isNearBottom();
     const d = document.createElement('details');
     d.className = 'row ' + (cls || '') + (currentNoAnim ? ' no-anim' : '');
-    if (wantsExpandedDefault()) d.open = true;
     d.appendChild(buildSummary(summary, icon));
     const pre = document.createElement('pre');
     pre.className = 'tool-body diff-body';