diff --git a/src/components/TerminalView.tsx b/src/components/TerminalView.tsx
index 01eda0a77..f115816ff 100644
--- a/src/components/TerminalView.tsx
+++ b/src/components/TerminalView.tsx
@@ -9,7 +9,7 @@ import { TerminalBookmarkGutter } from './TerminalBookmarks';
 import { invoke, fireAndForget, Channel } from '../lib/ipc';
 import { IPC } from '../../electron/ipc/channels';
 import { getTerminalFontFamily } from '../lib/fonts';
-import { TERMINAL_SCROLLBACK_LINES, base64ToUint8Array } from '../lib/terminalConstants';
+import { TERMINAL_SCROLL_OPTIONS, base64ToUint8Array } from '../lib/terminalConstants';
 import {
   getTerminalSearchDecorations,
   getTerminalTheme,
@@ -418,7 +418,7 @@ export function TerminalView(props: TerminalViewProps) {
       fontFamily: getTerminalFontFamily(store.terminalFont),
       theme: activeTerminalTheme(),
       allowProposedApi: true,
-      scrollback: TERMINAL_SCROLLBACK_LINES,
+      ...TERMINAL_SCROLL_OPTIONS,
       disableStdin: taskPtyDetached(),
       linkHandler: {
         activate: openTerminalHttpLinkWithModifier,
diff --git a/src/lib/terminalConstants.ts b/src/lib/terminalConstants.ts
index bf1b8e026..acd6f217e 100644
--- a/src/lib/terminalConstants.ts
+++ b/src/lib/terminalConstants.ts
@@ -1,6 +1,12 @@
 // Keep substantially more terminal history available for agent review/debugging
 // without turning xterm into a memory landfill.
-export const TERMINAL_SCROLLBACK_LINES = 10_000;
+// xterm defaults scrollSensitivity to 1 line per wheel notch, which makes scrolling
+// back through agent output painfully slow. Alt-scroll multiplies this again by
+// xterm's fastScrollSensitivity default of 5, so we leave that one alone.
+export const TERMINAL_SCROLL_OPTIONS = {
+  scrollback: 10_000,
+  scrollSensitivity: 2,
+} as const;
 
 // Pre-computed base64 lookup table — avoids atob() intermediate string allocation.
 const B64_LOOKUP = new Uint8Array(128);
diff --git a/src/remote/AgentDetail.tsx b/src/remote/AgentDetail.tsx
index e8a5defe2..c039f60ab 100644
--- a/src/remote/AgentDetail.tsx
+++ b/src/remote/AgentDetail.tsx
@@ -1,7 +1,7 @@
 import { onMount, onCleanup, createSignal, createEffect, untrack, Show, For } from 'solid-js';
 import { Terminal } from '@xterm/xterm';
 import { FitAddon } from '@xterm/addon-fit';
-import { TERMINAL_SCROLLBACK_LINES, base64ToUint8Array } from '../lib/terminalConstants';
+import { TERMINAL_SCROLL_OPTIONS, base64ToUint8Array } from '../lib/terminalConstants';
 import { createTerminalHttpLinkHandler } from '../lib/terminalLinks';
 import { fetchNotes, saveNotes } from './api';
 import { agentStatusDisplay } from './attention';
@@ -209,7 +209,7 @@ export function AgentDetail(props: AgentDetailProps) {
       fontSize: 10,
       fontFamily: TERM_FONT_FAMILY,
       theme: { background: '#0b0f14' },
-      scrollback: TERMINAL_SCROLLBACK_LINES,
+      ...TERMINAL_SCROLL_OPTIONS,
       cursorBlink: false,
       disableStdin: true,
       convertEol: false,