test(app): isolate terminal pane settings mock

Resolve drift where main evolved the same areas this feature touches:

- view.tsx: keep main's agent-stream/ layout refactor, drop the
  working-indicator/turn-copy helpers main relocated, fix moved import paths
- terminal-emulator.tsx: expose terminal find on the typed ref handle only
  (main's DOMImperativeFactory is JSON-serializable-only)
- file-pane.tsx: render syntax highlighting and find highlighting together,
  pass lineSelection through the searchable preview
- tests/e2e: track main's PaneContextValue.openImportSheet,
  TerminalEmulatorHandle (restoreOutput/blur), and the seed-client helper

packages/app/e2e/find-in-pane.spec.ts

@@ -0,0 +1,193 @@
+import { expect, test, type Page } from "./fixtures";
+import { waitForTabBar } from "./helpers/launcher";
+import { setupDeterministicPrompt, waitForTerminalContent } from "./helpers/terminal-perf";
+import { connectSeedClient } from "./helpers/seed-client";
+import { createTempGitRepo } from "./helpers/workspace";
+import { openFileExplorer, openFileFromExplorer } from "./helpers/file-explorer";
+import {
+  connectWorkspaceSetupClient,
+  openHomeWithProject,
+  seedProjectForWorkspaceSetup,
+} from "./helpers/workspace-setup";
+import { buildHostWorkspaceRoute } from "../src/utils/host-routes";
+
+function getServerId(): string {
+  const serverId = process.env.E2E_SERVER_ID;
+  if (!serverId) {
+    throw new Error("E2E_SERVER_ID is not set.");
+  }
+  return serverId;
+}
+
+function findShortcut(): string {
+  return process.platform === "darwin" ? "Meta+f" : "Control+f";
+}
+
+async function navigateToWorkspaceViaSidebar(page: Page, workspaceId: string): Promise<void> {
+  const row = page.getByTestId(`sidebar-workspace-row-${getServerId()}:${workspaceId}`);
+  await expect(row).toBeVisible({ timeout: 30_000 });
+  await row.click();
+  await waitForTabBar(page);
+}
+
+async function openFind(page: Page): Promise<void> {
+  await page.keyboard.press(findShortcut());
+  await expect(page.getByTestId("pane-find-bar")).toBeVisible({ timeout: 10_000 });
+}
+
+async function typeFindQuery(page: Page, query: string): Promise<void> {
+  const input = page.getByTestId("pane-find-input");
+  await expect(input).toBeVisible({ timeout: 10_000 });
+  await input.fill(query);
+}
+
+test.describe("in-pane find", () => {
+  test("walks chat, file, terminal, split-pane, and browser-web find flows in the running app", async ({
+    page,
+  }, testInfo) => {
+    test.setTimeout(120_000);
+
+    const client = await connectWorkspaceSetupClient();
+    const agentClient = await connectSeedClient();
+    const repo = await createTempGitRepo("find-pane-qa-", {
+      files: [
+        {
+          path: "src/find-target.txt",
+          content: [
+            "alpha needle first",
+            "beta without match",
+            "gamma NEEDLE second",
+            "delta needle third",
+            "",
+          ].join("\n"),
+        },
+      ],
+    });
+
+    try {
+      await seedProjectForWorkspaceSetup(client, repo.path);
+      const workspaceResult = await client.openProject(repo.path);
+      if (!workspaceResult.workspace) {
+        throw new Error(workspaceResult.error ?? `Failed to open project ${repo.path}`);
+      }
+
+      await openHomeWithProject(page, repo.path);
+      await navigateToWorkspaceViaSidebar(page, workspaceResult.workspace.id);
+
+      await openFileExplorer(page);
+      await openFileFromExplorer(page, "src");
+      await openFileFromExplorer(page, "find-target.txt");
+      await expect(page.getByTestId("workspace-file-pane")).toBeVisible({ timeout: 30_000 });
+      await page.getByTestId("workspace-file-pane").click();
+
+      await openFind(page);
+      await typeFindQuery(page, "needle");
+      await expect(page.getByText("1 / 3")).toBeVisible({ timeout: 10_000 });
+      await page.getByTestId("pane-find-next").click();
+      await expect(page.getByText("2 / 3")).toBeVisible({ timeout: 10_000 });
+      await page.getByTestId("pane-find-prev").click();
+      await expect(page.getByText("1 / 3")).toBeVisible({ timeout: 10_000 });
+      await page.getByTestId("pane-find-input").focus();
+      await page.keyboard.press("Enter");
+      await expect(page.getByText("2 / 3")).toBeVisible({ timeout: 10_000 });
+      await page.keyboard.press("Shift+Enter");
+      await expect(page.getByText("1 / 3")).toBeVisible({ timeout: 10_000 });
+      await typeFindQuery(page, "missing-value");
+      await expect(page.getByText("No matches")).toBeVisible({ timeout: 10_000 });
+      await typeFindQuery(page, "");
+      await expect(page.getByText("0 / 0")).toBeVisible({ timeout: 10_000 });
+      await typeFindQuery(page, "needle");
+      await page.keyboard.press("Escape");
+      await expect(page.getByTestId("pane-find-bar")).toHaveCount(0);
+      await testInfo.attach("file-find-walkthrough", {
+        body: await page.screenshot(),
+        contentType: "image/png",
+      });
+
+      await page.getByLabel("Split pane right").filter({ visible: true }).last().click();
+      await expect(page.getByTestId("workspace-tabs-row").filter({ visible: true })).toHaveCount(2);
+      await page.getByTestId("workspace-new-terminal").filter({ visible: true }).last().click();
+      const splitTerminal = page.getByTestId("terminal-surface").last();
+      await expect(splitTerminal).toBeVisible({ timeout: 20_000 });
+      await splitTerminal.click();
+      await setupDeterministicPrompt(page, `SPLIT_FIND_READY_${Date.now()}`);
+      await splitTerminal.pressSequentially("printf 'split needle one\\nsplit needle two\\n'\n", {
+        delay: 0,
+      });
+      await waitForTerminalContent(page, (text) => text.includes("split needle two"), 10_000);
+      await openFind(page);
+      await typeFindQuery(page, "needle");
+      await expect(page.getByText(/[1-9] \/ [1-9]/)).toBeVisible({
+        timeout: 10_000,
+      });
+      await page.getByTestId("workspace-file-pane").click();
+      await expect(page.getByTestId("pane-find-bar")).toHaveCount(0);
+      await openFind(page);
+      await typeFindQuery(page, "needle");
+      await expect(page.getByText("1 / 3")).toBeVisible({ timeout: 10_000 });
+      await page.getByTestId("pane-find-close").click();
+      await expect(page.getByTestId("pane-find-bar")).toHaveCount(0);
+      await testInfo.attach("terminal-find-walkthrough", {
+        body: await page.screenshot(),
+        contentType: "image/png",
+      });
+      await testInfo.attach("split-pane-focus-switching", {
+        body: await page.screenshot(),
+        contentType: "image/png",
+      });
+
+      const agent = await agentClient.createAgent({
+        provider: "mock",
+        cwd: repo.path,
+        title: "Find pane QA",
+        modeId: "load-test",
+        model: "ten-second-stream",
+        initialPrompt: "chat needle alpha",
+      });
+      await page.goto(
+        `${buildHostWorkspaceRoute(getServerId(), repo.path)}?open=${encodeURIComponent(
+          `agent:${agent.id}`,
+        )}`,
+      );
+      await expect(page.getByText("chat needle alpha").first()).toBeVisible({
+        timeout: 30_000,
+      });
+      await page.getByText("chat needle alpha").first().click();
+      await openFind(page);
+      await typeFindQuery(page, "needle");
+      await expect(page.getByText(/[1-9] \/ [1-9]/)).toBeVisible({ timeout: 10_000 });
+      await page.getByTestId("pane-find-next").click();
+      await page.getByTestId("pane-find-prev").click();
+      await page.getByTestId("pane-find-close").click();
+      await expect(page.getByTestId("pane-find-bar")).toHaveCount(0);
+      await testInfo.attach("chat-find-walkthrough", {
+        body: await page.screenshot(),
+        contentType: "image/png",
+      });
+
+      await page.getByTestId("workspace-header-menu-trigger").click();
+      const browserMenuItem = page.getByTestId("workspace-header-new-browser");
+      if (await browserMenuItem.isVisible().catch(() => false)) {
+        await browserMenuItem.click();
+        await expect(
+          page.getByText("Open this workspace in Electron to use the built-in browser."),
+        ).toBeVisible({ timeout: 10_000 });
+        await page.keyboard.press(findShortcut());
+        await expect(page.getByTestId("pane-find-bar")).toHaveCount(0);
+        await testInfo.attach("browser-web-fallback", {
+          body: await page.screenshot(),
+          contentType: "image/png",
+        });
+      } else {
+        await testInfo.attach("browser-web-fallback", {
+          body: "Browser tab creation is not exposed in this browser-web runtime.",
+          contentType: "text/plain",
+        });
+      }
+    } finally {
+      await agentClient.close();
+      await client.close();
+      await repo.cleanup();
+    }
+  });
+});

packages/app/src/agent-stream/strategy-native.tsx

@@ -32,11 +32,30 @@ const DEFAULT_MAINTAIN_VISIBLE_CONTENT_POSITION = Object.freeze({
   autoscrollToTopThreshold: 0,
 });
 const HISTORY_START_THRESHOLD_PX = 96;
+const SCROLL_TO_INDEX_RETRY_DELAY_MS = 80;
+
+interface NativeScrollToIndexFailedInfo {
+  index: number;
+  highestMeasuredFrameIndex: number;
+  averageItemLength: number;
+}
+
+interface NativeScrollIndexFallbackInput {
+  index: number;
+  averageItemLength: number;
+}
 
 function keyExtractor(item: { id: string }): string {
   return item.id;
 }
 
+export function getNativeScrollToIndexFallbackOffset(input: NativeScrollIndexFallbackInput) {
+  if (!Number.isFinite(input.averageItemLength) || input.averageItemLength <= 0) {
+    return 0;
+  }
+  return Math.max(0, input.averageItemLength * input.index);
+}
+
 function NativeStreamViewport(props: StreamRenderInput & { strategy: StreamStrategy }) {
   const {
     agentId,
@@ -69,6 +88,7 @@ function NativeStreamViewport(props: StreamRenderInput & { strategy: StreamStrat
   });
   const scrollOffsetYRef = useRef(0);
   const programmaticScrollEventBudgetRef = useRef(0);
+  const scrollToIndexRetryTimeoutRef = useRef<ReturnType<typeof setTimeout> | null>(null);
   const [isNativeViewportSettling, setIsNativeViewportSettling] = useState(false);
   const nativeViewportSettlingFrameIdRef = useRef<number | null>(null);
   const historyStartReadyRef = useRef(false);
@@ -87,6 +107,13 @@ function NativeStreamViewport(props: StreamRenderInput & { strategy: StreamStrat
     }
   }, []);
 
+  const clearScrollToIndexRetry = useCallback(() => {
+    if (scrollToIndexRetryTimeoutRef.current !== null) {
+      clearTimeout(scrollToIndexRetryTimeoutRef.current);
+      scrollToIndexRetryTimeoutRef.current = null;
+    }
+  }, []);
+
   const markNativeViewportSettling = useCallback(() => {
     clearNativeViewportSettling();
     setIsNativeViewportSettling(true);
@@ -149,6 +176,37 @@ function NativeStreamViewport(props: StreamRenderInput & { strategy: StreamStrat
     scrollToBottom,
   });
 
+  const scrollToHistoryIndex = useCallback(
+    (index: number) => {
+      programmaticScrollEventBudgetRef.current = 3;
+      clearScrollToIndexRetry();
+      flatListRef.current?.scrollToIndex({
+        index,
+        animated: true,
+        viewPosition: 0.5,
+      });
+    },
+    [clearScrollToIndexRetry],
+  );
+
+  const handleScrollToIndexFailed = useStableEvent((info: NativeScrollToIndexFailedInfo) => {
+    programmaticScrollEventBudgetRef.current = 3;
+    flatListRef.current?.scrollToOffset({
+      offset: getNativeScrollToIndexFallbackOffset(info),
+      animated: true,
+    });
+    clearScrollToIndexRetry();
+    scrollToIndexRetryTimeoutRef.current = setTimeout(() => {
+      scrollToIndexRetryTimeoutRef.current = null;
+      programmaticScrollEventBudgetRef.current = 3;
+      flatListRef.current?.scrollToIndex({
+        index: info.index,
+        animated: true,
+        viewPosition: 0.5,
+      });
+    }, SCROLL_TO_INDEX_RETRY_DELAY_MS);
+  });
+
   useEffect(() => {
     streamViewportMetricsRef.current = {
       containerKey: "native-virtualized",
@@ -161,6 +219,7 @@ function NativeStreamViewport(props: StreamRenderInput & { strategy: StreamStrat
     };
     scrollOffsetYRef.current = 0;
     clearNativeViewportSettling();
+    clearScrollToIndexRetry();
     setIsNativeViewportSettling(false);
     historyStartReadyRef.current = false;
     const frame = requestAnimationFrame(() => {
@@ -169,7 +228,7 @@ function NativeStreamViewport(props: StreamRenderInput & { strategy: StreamStrat
     return () => {
       cancelAnimationFrame(frame);
     };
-  }, [agentId, clearNativeViewportSettling]);
+  }, [agentId, clearNativeViewportSettling, clearScrollToIndexRetry]);
 
   useEffect(() => {
     const keyboardEvents = [
@@ -190,8 +249,9 @@ function NativeStreamViewport(props: StreamRenderInput & { strategy: StreamStrat
         subscription.remove();
       }
       clearNativeViewportSettling();
+      clearScrollToIndexRetry();
     };
-  }, [clearNativeViewportSettling, markNativeViewportSettling]);
+  }, [clearNativeViewportSettling, clearScrollToIndexRetry, markNativeViewportSettling]);
 
   useEffect(() => {
     bottomAnchorController.prepareForStickyContentChange();
@@ -209,6 +269,17 @@ function NativeStreamViewport(props: StreamRenderInput & { strategy: StreamStrat
         bottomAnchorController.prepareForStickyViewportChange();
         markNativeViewportSettling();
       },
+      scrollToStreamItem: (target) => {
+        programmaticScrollEventBudgetRef.current = 3;
+        if (target.source === "liveHead") {
+          flatListRef.current?.scrollToOffset({
+            offset: 0,
+            animated: true,
+          });
+          return;
+        }
+        scrollToHistoryIndex(target.index);
+      },
     };
     viewportRef.current = handle;
     return () => {
@@ -216,7 +287,13 @@ function NativeStreamViewport(props: StreamRenderInput & { strategy: StreamStrat
         viewportRef.current = null;
       }
     };
-  }, [agentId, bottomAnchorController, markNativeViewportSettling, viewportRef]);
+  }, [
+    agentId,
+    bottomAnchorController,
+    markNativeViewportSettling,
+    scrollToHistoryIndex,
+    viewportRef,
+  ]);
 
   const handleScroll = useStableEvent((event: NativeSyntheticEvent<NativeScrollEvent>) => {
     const { contentOffset, contentSize, layoutMeasurement } = event.nativeEvent;
@@ -360,6 +437,7 @@ function NativeStreamViewport(props: StreamRenderInput & { strategy: StreamStrat
       onScroll={handleScroll}
       scrollEventThrottle={16}
       onContentSizeChange={handleContentSizeChange}
+      onScrollToIndexFailed={handleScrollToIndexFailed}
       maintainVisibleContentPosition={DEFAULT_MAINTAIN_VISIBLE_CONTENT_POSITION}
       initialNumToRender={40}
       maxToRenderPerBatch={40}

packages/app/src/agent-stream/strategy-web.tsx

@@ -1,5 +1,4 @@
 import React, {
-  Fragment,
   type CSSProperties,
   useCallback,
   useEffect,
@@ -67,6 +66,10 @@ function scrollElementToBottom(
   });
 }
 
+function getStreamItemElementId(itemId: string): string {
+  return `agent-stream-row-${itemId}`;
+}
+
 function syncNearBottom(
   scrollContainer: HTMLElement | null,
   onNearBottomChange: (value: boolean) => void,
@@ -468,6 +471,21 @@ function WebStreamViewport(props: StreamRenderInput & { isMobileBreakpoint: bool
         }
         scheduleStickToBottom();
       },
+      scrollToStreamItem: (target) => {
+        setFollowOutput(false);
+        cancelPendingStickToBottom();
+        if (target.source === "historyVirtualized") {
+          rowVirtualizer.scrollToIndex(target.index, { align: "center" });
+          return;
+        }
+        const row = document.getElementById(getStreamItemElementId(target.itemId));
+        row?.scrollIntoView({ block: "center", behavior: "auto" });
+        const scrollContainer = scrollContainerRef.current;
+        if (scrollContainer) {
+          lastKnownScrollTopRef.current = scrollContainer.scrollTop;
+          syncNearBottom(scrollContainer, onNearBottomChange);
+        }
+      },
     };
     viewportRef.current = handle;
     return () => {
@@ -476,7 +494,14 @@ function WebStreamViewport(props: StreamRenderInput & { isMobileBreakpoint: bool
       }
       cancelPendingStickToBottom();
     };
-  }, [cancelPendingStickToBottom, forceStickToBottom, scheduleStickToBottom, viewportRef]);
+  }, [
+    cancelPendingStickToBottom,
+    forceStickToBottom,
+    onNearBottomChange,
+    rowVirtualizer,
+    scheduleStickToBottom,
+    viewportRef,
+  ]);
 
   const contentContainerStyle = useMemo((): CSSProperties => {
     return {
@@ -520,14 +545,16 @@ function WebStreamViewport(props: StreamRenderInput & { isMobileBreakpoint: bool
   );
   const mountedHistoryRows = useMemo(() => {
     return segments.historyMounted.map((item, index) => (
-      <Fragment key={item.id}>
+      <div id={getStreamItemElementId(item.id)} key={item.id}>
         {renderHistoryMountedRow(item, index, segments.historyMounted)}
-      </Fragment>
+      </div>
     ));
   }, [renderHistoryMountedRow, segments.historyMounted]);
   const liveHeadRows = useMemo(() => {
     return segments.liveHead.map((item, index) => (
-      <Fragment key={item.id}>{renderLiveHeadRow(item, index, segments.liveHead)}</Fragment>
+      <div id={getStreamItemElementId(item.id)} key={item.id}>
+        {renderLiveHeadRow(item, index, segments.liveHead)}
+      </div>
     ));
   }, [renderLiveHeadRow, segments.liveHead]);
   const liveAuxiliary = useMemo(() => {
@@ -570,6 +597,7 @@ function WebStreamViewport(props: StreamRenderInput & { isMobileBreakpoint: bool
                   <div
                     key={virtualRow.key}
                     data-index={virtualRow.index}
+                    id={getStreamItemElementId(item.id)}
                     ref={measureVirtualizedRowElement}
                     style={renderVirtualRowStyle(virtualRow.start)}
                   >

packages/app/src/agent-stream/strategy.ts

@@ -42,6 +42,13 @@ export interface StreamEdgeSlotProps {
 export interface StreamViewportHandle {
   scrollToBottom: (reason?: BottomAnchorLocalRequest["reason"]) => void;
   prepareForViewportChange: () => void;
+  scrollToStreamItem: (target: StreamScrollTarget) => void;
+}
+
+export interface StreamScrollTarget {
+  source: "historyVirtualized" | "historyMounted" | "liveHead";
+  index: number;
+  itemId: string;
 }
 
 export interface StreamSegmentRenderers {

packages/app/src/agent-stream/view.tsx

@@ -36,6 +36,7 @@ import {
   CompactionMarker,
   MessageOuterSpacingProvider,
   type InlinePathTarget,
+  type MessageFindHighlight,
 } from "@/components/message";
 import { PlanCard } from "@/components/plan-card";
 import type { StreamItem } from "@/types/stream";
@@ -58,6 +59,11 @@ import { resolveStreamRenderStrategy } from "./strategy-resolver";
 import { type StreamSegmentRenderers, type StreamViewportHandle } from "./strategy";
 import { CompletedTurnFooterRow, TurnFooter, type TurnContentStrategy } from "./turn-footer";
 import { layoutStream, type StreamLayoutItem } from "./layout";
+import {
+  buildAgentStreamSearchModel,
+  findAgentStreamSearchMatches,
+  type AgentStreamSearchMatch,
+} from "@/components/agent-stream-search-model";
 import {
   type BottomAnchorLocalRequest,
   type BottomAnchorRouteRequest,
@@ -75,6 +81,12 @@ import {
 import { resolveWorkspaceIdByExecutionDirectory } from "@/utils/workspace-execution";
 import { navigateToPreparedWorkspaceTab } from "@/utils/workspace-navigation";
 import { useStableEvent } from "@/hooks/use-stable-event";
+import {
+  FindBar,
+  type PaneFindMatchState,
+  type UsePaneFindResult,
+  usePaneFind,
+} from "@/panels/pane-find";
 import { isWeb } from "@/constants/platform";
 import type { Theme } from "@/styles/theme";
 
@@ -197,6 +209,69 @@ function renderLiveHeadStreamItem(input: {
   return input.renderStreamItem(layoutItem);
 }
 
+function createAgentStreamFindMatchState(input: {
+  query: string;
+  matches: AgentStreamSearchMatch[];
+  currentMatchId: string | null;
+}): PaneFindMatchState {
+  if (input.query.length === 0) {
+    return { status: "empty" };
+  }
+  if (input.matches.length === 0) {
+    return { status: "no-match" };
+  }
+  const currentIndex = Math.max(
+    0,
+    input.matches.findIndex((match) => match.id === input.currentMatchId),
+  );
+  return {
+    status: "matched",
+    current: currentIndex + 1,
+    total: input.matches.length,
+  };
+}
+
+function createAgentStreamFindHighlightsByItemId(input: {
+  matches: AgentStreamSearchMatch[];
+  currentMatchId: string | null;
+}): Map<string, MessageFindHighlight[]> {
+  const highlightsByItemId = new Map<string, MessageFindHighlight[]>();
+
+  for (const match of input.matches) {
+    if (match.segmentKey !== "text") {
+      continue;
+    }
+
+    const itemKind = match.entry.item.kind;
+    if (itemKind !== "user_message" && itemKind !== "assistant_message") {
+      continue;
+    }
+
+    const highlights = highlightsByItemId.get(match.entry.item.id) ?? [];
+    highlights.push({
+      id: match.id,
+      start: match.start,
+      end: match.end,
+      isCurrent: match.id === input.currentMatchId,
+    });
+    highlightsByItemId.set(match.entry.item.id, highlights);
+  }
+
+  return highlightsByItemId;
+}
+
+interface AgentStreamFindState {
+  query: string;
+  matches: AgentStreamSearchMatch[];
+  currentMatchId: string | null;
+}
+
+const EMPTY_AGENT_STREAM_FIND_STATE: AgentStreamFindState = {
+  query: "",
+  matches: [],
+  currentMatchId: null,
+};
+
 export interface AgentStreamViewHandle {
   scrollToBottom(reason?: BottomAnchorLocalRequest["reason"]): void;
   prepareForViewportChange(): void;
@@ -373,6 +448,154 @@ const AgentStreamViewComponent = forwardRef<AgentStreamViewHandle, AgentStreamVi
         streamRenderStrategy,
       ],
     );
+    const searchModel = useMemo(
+      () =>
+        buildAgentStreamSearchModel({
+          streamItems,
+          streamHead: streamHead ?? [],
+          platform: isWeb ? "web" : "native",
+          isMobileBreakpoint: isMobile,
+          cwd: agent.cwd,
+        }),
+      [agent.cwd, isMobile, streamHead, streamItems],
+    );
+    const [findState, setFindState] = useState<AgentStreamFindState>(EMPTY_AGENT_STREAM_FIND_STATE);
+    const findQuery = findState.query;
+    const findMatches = findState.matches;
+    const currentFindMatchId = findState.currentMatchId;
+    const currentFindMatchIndex = useMemo(() => {
+      if (findMatches.length === 0) {
+        return -1;
+      }
+      const existingIndex = findMatches.findIndex((match) => match.id === currentFindMatchId);
+      return existingIndex >= 0 ? existingIndex : 0;
+    }, [currentFindMatchId, findMatches]);
+    const findMatchState = useMemo(
+      () =>
+        createAgentStreamFindMatchState({
+          query: findQuery,
+          matches: findMatches,
+          currentMatchId: currentFindMatchId,
+        }),
+      [currentFindMatchId, findMatches, findQuery],
+    );
+    const findHighlightsByItemId = useMemo(
+      () =>
+        createAgentStreamFindHighlightsByItemId({
+          matches: findMatches,
+          currentMatchId: currentFindMatchId,
+        }),
+      [currentFindMatchId, findMatches],
+    );
+    const scrollFindMatchIntoView = useCallback((match: AgentStreamSearchMatch | undefined) => {
+      if (!match) {
+        return;
+      }
+      viewportRef.current?.scrollToStreamItem({
+        source: match.entry.source,
+        index: match.entry.index,
+        itemId: match.entry.item.id,
+      });
+    }, []);
+    const paneFind = usePaneFind({
+      matchState: findMatchState,
+      onQuery: (query) => {
+        const nextMatches = findAgentStreamSearchMatches({
+          model: searchModel,
+          query,
+        });
+        const nextMatchId = nextMatches[0]?.id ?? null;
+        setFindState({ query, matches: nextMatches, currentMatchId: nextMatchId });
+        scrollFindMatchIntoView(nextMatches[0]);
+        return createAgentStreamFindMatchState({
+          query,
+          matches: nextMatches,
+          currentMatchId: nextMatchId,
+        });
+      },
+      onNext: () => {
+        if (findMatches.length === 0) {
+          return findMatchState;
+        }
+        const nextIndex = (currentFindMatchIndex + 1) % findMatches.length;
+        const nextMatch = findMatches[nextIndex];
+        setFindState((current) => ({
+          ...current,
+          currentMatchId: nextMatch?.id ?? null,
+        }));
+        scrollFindMatchIntoView(nextMatch);
+        return createAgentStreamFindMatchState({
+          query: findQuery,
+          matches: findMatches,
+          currentMatchId: nextMatch?.id ?? null,
+        });
+      },
+      onPrev: () => {
+        if (findMatches.length === 0) {
+          return findMatchState;
+        }
+        const nextIndex = (currentFindMatchIndex - 1 + findMatches.length) % findMatches.length;
+        const nextMatch = findMatches[nextIndex];
+        setFindState((current) => ({
+          ...current,
+          currentMatchId: nextMatch?.id ?? null,
+        }));
+        scrollFindMatchIntoView(nextMatch);
+        return createAgentStreamFindMatchState({
+          query: findQuery,
+          matches: findMatches,
+          currentMatchId: nextMatch?.id ?? null,
+        });
+      },
+      onClose: () => {
+        setFindState(EMPTY_AGENT_STREAM_FIND_STATE);
+      },
+    });
+    useEffect(() => {
+      setFindState((current) => {
+        if (current.query.length === 0) {
+          return current.currentMatchId === null && current.matches.length === 0
+            ? current
+            : EMPTY_AGENT_STREAM_FIND_STATE;
+        }
+
+        const nextMatches = findAgentStreamSearchMatches({
+          model: searchModel,
+          query: current.query,
+        });
+        let keepsCurrentMatch = false;
+        if (current.currentMatchId) {
+          for (const match of nextMatches) {
+            if (match.id === current.currentMatchId) {
+              keepsCurrentMatch = true;
+              break;
+            }
+          }
+        }
+        const nextMatchId = keepsCurrentMatch
+          ? current.currentMatchId
+          : (nextMatches[0]?.id ?? null);
+
+        let matchesUnchanged = current.matches.length === nextMatches.length;
+        if (matchesUnchanged) {
+          for (let index = 0; index < current.matches.length; index += 1) {
+            if (current.matches[index]?.id !== nextMatches[index]?.id) {
+              matchesUnchanged = false;
+              break;
+            }
+          }
+        }
+        if (matchesUnchanged && current.currentMatchId === nextMatchId) {
+          return current;
+        }
+
+        return {
+          query: current.query,
+          matches: nextMatches,
+          currentMatchId: nextMatchId,
+        };
+      });
+    }, [searchModel]);
     useImperativeHandle(
       ref,
       () => ({
@@ -423,10 +646,11 @@ const AgentStreamViewComponent = forwardRef<AgentStreamViewHandle, AgentStreamVi
             client={client}
             isFirstInGroup={layoutItem.isFirstInUserGroup}
             isLastInGroup={layoutItem.isLastInUserGroup}
+            findHighlights={findHighlightsByItemId.get(item.id)}
           />
         );
       },
-      [agent.capabilities, agentId, client, resolvedServerId],
+      [agent.capabilities, agentId, client, findHighlightsByItemId, resolvedServerId],
     );
 
     const renderAssistantMessageItem = useCallback(
@@ -446,11 +670,19 @@ const AgentStreamViewComponent = forwardRef<AgentStreamViewHandle, AgentStreamVi
               serverId={resolvedServerId}
               client={client}
               spacing={layoutItem.assistantSpacing}
+              findHighlights={findHighlightsByItemId.get(item.id)}
             />
           </AssistantFileLinkResolverProvider>
         );
       },
-      [client, handleInlinePathPress, resolvedServerId, toast, workspaceRoot],
+      [
+        client,
+        findHighlightsByItemId,
+        handleInlinePathPress,
+        resolvedServerId,
+        toast,
+        workspaceRoot,
+      ],
     );
 
     const renderThoughtItem = useCallback(
@@ -700,6 +932,7 @@ const AgentStreamViewComponent = forwardRef<AgentStreamViewHandle, AgentStreamVi
     return (
       <ToolCallSheetProvider>
         <View style={stylesheet.container}>
+          <AgentStreamFindBarSlot paneFind={paneFind} />
           <MessageOuterSpacingProvider disableOuterSpacing>
             {streamRenderStrategy.render({
               agentId,
@@ -748,6 +981,10 @@ const AgentStreamViewComponent = forwardRef<AgentStreamViewHandle, AgentStreamVi
 export const AgentStreamView = memo(AgentStreamViewComponent);
 AgentStreamView.displayName = "AgentStreamView";
 
+function AgentStreamFindBarSlot({ paneFind }: { paneFind: UsePaneFindResult }) {
+  return paneFind.isOpen ? <FindBar {...paneFind.findBarProps} /> : null;
+}
+
 interface ToolCallSlotProps extends Omit<
   ComponentProps<typeof ToolCall>,
   "onInlineDetailsExpandedChange"

packages/app/src/components/agent-stream-search-model.test.ts

@@ -0,0 +1,190 @@
+import { describe, expect, it } from "vitest";
+import type { StreamItem } from "@/types/stream";
+import {
+  buildAgentStreamSearchModel,
+  findAgentStreamSearchMatches,
+} from "./agent-stream-search-model";
+
+function timestamp(seed: number): Date {
+  return new Date(`2026-01-01T00:00:${seed.toString().padStart(2, "0")}.000Z`);
+}
+
+function userMessage(id: string, text: string, seed = 1): StreamItem {
+  return {
+    kind: "user_message",
+    id,
+    text,
+    timestamp: timestamp(seed),
+  };
+}
+
+function assistantMessage(id: string, text: string, seed = 1): StreamItem {
+  return {
+    kind: "assistant_message",
+    id,
+    text,
+    timestamp: timestamp(seed),
+  };
+}
+
+function thought(id: string, text: string, seed = 1): StreamItem {
+  return {
+    kind: "thought",
+    id,
+    text,
+    status: "ready",
+    timestamp: timestamp(seed),
+  };
+}
+
+function activityLog(id: string, message: string, seed = 1): StreamItem {
+  return {
+    kind: "activity_log",
+    id,
+    activityType: "info",
+    message,
+    metadata: { hidden: "metadata is not searched" },
+    timestamp: timestamp(seed),
+  };
+}
+
+function todoList(id: string, seed = 1): StreamItem {
+  return {
+    kind: "todo_list",
+    id,
+    provider: "codex",
+    items: [
+      { text: "Write the red test", completed: true },
+      { text: "Make search green", completed: false },
+    ],
+    timestamp: timestamp(seed),
+  };
+}
+
+function getSearchableText(item: StreamItem): string {
+  const model = buildAgentStreamSearchModel({
+    streamItems: [item],
+    streamHead: [],
+    platform: "web",
+    isMobileBreakpoint: true,
+  });
+  return model.entries[0]?.text ?? "";
+}
+
+describe("buildAgentStreamSearchModel", () => {
+  it("indexes user and assistant message text", () => {
+    expect(getSearchableText(userMessage("u1", "user text"))).toBe("user text");
+    expect(getSearchableText(assistantMessage("a1", "assistant text"))).toBe("assistant text");
+  });
+
+  it("excludes non-message rows that do not render find highlights", () => {
+    expect(getSearchableText(thought("t1", "thought text"))).toBe("");
+    expect(getSearchableText(activityLog("l1", "activity text"))).toBe("");
+    expect(getSearchableText(todoList("todo"))).toBe("");
+  });
+
+  it("excludes tool call rows from the search index", () => {
+    const toolCall: StreamItem = {
+      kind: "tool_call",
+      id: "shell",
+      timestamp: timestamp(1),
+      payload: {
+        source: "agent",
+        data: {
+          provider: "codex",
+          callId: "call-shell",
+          name: "exec_command",
+          status: "completed",
+          error: null,
+          detail: {
+            type: "shell",
+            command: "npm run typecheck",
+            output: "internal output should stay out",
+          },
+        },
+      },
+    };
+
+    expect(getSearchableText(toolCall)).toBe("");
+  });
+
+  it("orders virtualized history, mounted history, live head, and optimistic items deterministically", () => {
+    const committed: StreamItem[] = [];
+    for (let index = 0; index < 64; index += 1) {
+      committed.push(userMessage(`u${index}`, `history ${index}`, index));
+    }
+    const optimistic = userMessage("optimistic", "draft message", 65);
+    const liveHead = [assistantMessage("live", "live answer", 66)];
+
+    const model = buildAgentStreamSearchModel({
+      streamItems: committed,
+      optimisticItems: [optimistic],
+      streamHead: liveHead,
+      platform: "web",
+      isMobileBreakpoint: false,
+    });
+
+    expect(model.entries.at(0)?.item.id).toBe("optimistic");
+    expect(model.entries.map((entry) => entry.source)).toEqual([
+      ...Array.from(
+        { length: model.segments.historyVirtualized.length },
+        () => "historyVirtualized",
+      ),
+      ...Array.from({ length: model.segments.historyMounted.length }, () => "historyMounted"),
+      "liveHead",
+    ]);
+    expect(model.entries.at(-1)?.item.id).toBe("live");
+  });
+
+  it("does not duplicate an optimistic item once committed history has the same id", () => {
+    const committed = [userMessage("u1", "committed draft")];
+    const model = buildAgentStreamSearchModel({
+      streamItems: committed,
+      optimisticItems: [userMessage("u1", "optimistic draft")],
+      streamHead: [],
+      platform: "web",
+      isMobileBreakpoint: true,
+    });
+
+    expect(model.entries.map((entry) => entry.text)).toEqual(["committed draft"]);
+  });
+});
+
+describe("findAgentStreamSearchMatches", () => {
+  it("returns stable match ids from item identity and local occurrence data", () => {
+    const model = buildAgentStreamSearchModel({
+      streamItems: [assistantMessage("a1", "Alpha alpha beta")],
+      streamHead: [assistantMessage("h1", "alpha live")],
+      platform: "web",
+      isMobileBreakpoint: true,
+    });
+
+    const matches = findAgentStreamSearchMatches({
+      model,
+      query: "alpha",
+    });
+
+    expect(matches.map((match) => match.id)).toEqual([
+      "a1:text:0:0:5",
+      "a1:text:1:6:11",
+      "h1:text:0:0:5",
+    ]);
+    expect(matches.map((match) => match.entry.item.id)).toEqual(["a1", "a1", "h1"]);
+  });
+
+  it("skips fenced code blocks while preserving message offsets for highlights", () => {
+    const model = buildAgentStreamSearchModel({
+      streamItems: [assistantMessage("a1", "before alpha\n```\nalpha\n```\nafter alpha")],
+      streamHead: [],
+      platform: "web",
+      isMobileBreakpoint: true,
+    });
+
+    const matches = findAgentStreamSearchMatches({
+      model,
+      query: "alpha",
+    });
+
+    expect(matches.map((match) => match.id)).toEqual(["a1:text:0:7:12", "a1:text:0:33:38"]);
+  });
+});

packages/app/src/components/agent-stream-search-model.ts

@@ -0,0 +1,276 @@
+import type { StreamItem } from "@/types/stream";
+import {
+  findMountedWindowStart,
+  getWebMountedRecentStreamItems,
+  getWebPartialVirtualizationThreshold,
+} from "@/agent-stream/web-virtualization";
+
+type AgentStreamSearchSource = "historyVirtualized" | "historyMounted" | "liveHead";
+
+interface AgentStreamSearchTextSegment {
+  key: string;
+  text: string;
+  startOffset: number;
+}
+
+interface AgentStreamSearchEntry {
+  item: StreamItem;
+  source: AgentStreamSearchSource;
+  index: number;
+  text: string;
+  segments: AgentStreamSearchTextSegment[];
+}
+
+export interface AgentStreamSearchMatch {
+  id: string;
+  entry: AgentStreamSearchEntry;
+  segmentKey: string;
+  occurrenceIndex: number;
+  start: number;
+  end: number;
+}
+
+interface AgentStreamSearchModel {
+  entries: AgentStreamSearchEntry[];
+  segments: {
+    historyVirtualized: AgentStreamSearchEntry[];
+    historyMounted: AgentStreamSearchEntry[];
+    liveHead: AgentStreamSearchEntry[];
+  };
+}
+
+interface BuildAgentStreamSearchModelInput {
+  platform: "web" | "native";
+  isMobileBreakpoint: boolean;
+  streamItems: StreamItem[];
+  streamHead: StreamItem[];
+  optimisticItems?: StreamItem[];
+  cwd?: string;
+}
+
+interface FindAgentStreamSearchMatchesInput {
+  model: AgentStreamSearchModel;
+  query: string;
+}
+
+function getFenceDelimiter(line: string): string | null {
+  const match = /^( {0,3})(`{3,}|~{3,})/.exec(line);
+  return match?.[2] ?? null;
+}
+
+function getMessageSearchableSegments(text: string): AgentStreamSearchTextSegment[] {
+  const segments: AgentStreamSearchTextSegment[] = [];
+  let activeFenceCharacter: "`" | "~" | null = null;
+  let activeFenceLength = 0;
+  let currentText = "";
+  let currentStartOffset = 0;
+  let offset = 0;
+
+  const flush = () => {
+    if (currentText.length > 0) {
+      segments.push({ key: "text", text: currentText, startOffset: currentStartOffset });
+      currentText = "";
+    }
+  };
+
+  for (const line of text.split("\n")) {
+    const lineWithBreak = offset + line.length < text.length ? `${line}\n` : line;
+    const fenceDelimiter = getFenceDelimiter(line);
+    const isClosingFence =
+      activeFenceCharacter &&
+      fenceDelimiter?.[0] === activeFenceCharacter &&
+      fenceDelimiter.length >= activeFenceLength;
+    const isOpeningFence = !activeFenceCharacter && fenceDelimiter;
+    const isIndentedCode = !activeFenceCharacter && (/^( {4,}|\t)/.test(line) || line === "    ");
+
+    if (isOpeningFence || activeFenceCharacter || isIndentedCode) {
+      flush();
+    } else {
+      if (currentText.length === 0) {
+        currentStartOffset = offset;
+      }
+      currentText += lineWithBreak;
+    }
+
+    if (isOpeningFence) {
+      activeFenceCharacter = fenceDelimiter[0] as "`" | "~";
+      activeFenceLength = fenceDelimiter.length;
+    } else if (isClosingFence) {
+      activeFenceCharacter = null;
+      activeFenceLength = 0;
+    }
+
+    offset += lineWithBreak.length;
+  }
+
+  flush();
+  return segments;
+}
+
+function getAgentStreamItemSearchableSegments(item: StreamItem): AgentStreamSearchTextSegment[] {
+  switch (item.kind) {
+    case "user_message":
+    case "assistant_message":
+      return item.text ? getMessageSearchableSegments(item.text) : [];
+    case "thought":
+    case "activity_log":
+    case "todo_list":
+    case "tool_call":
+    case "compaction":
+      return [];
+  }
+}
+
+function mergeOptimisticItems(input: {
+  streamItems: StreamItem[];
+  optimisticItems: StreamItem[] | undefined;
+}): StreamItem[] {
+  if (!input.optimisticItems || input.optimisticItems.length === 0) {
+    return input.streamItems;
+  }
+  const committedIds = new Set(input.streamItems.map((item) => item.id));
+  const pendingOptimisticItems = input.optimisticItems.filter((item) => !committedIds.has(item.id));
+  if (pendingOptimisticItems.length === 0) {
+    return input.streamItems;
+  }
+  return [...pendingOptimisticItems, ...input.streamItems];
+}
+
+function buildEntries(input: {
+  items: StreamItem[];
+  source: AgentStreamSearchSource;
+  startIndex: number;
+  cwd: string | undefined;
+}): AgentStreamSearchEntry[] {
+  return input.items.map((item, offset) => {
+    const segments = getAgentStreamItemSearchableSegments(item);
+    return {
+      item,
+      source: input.source,
+      index: input.startIndex + offset,
+      text: segments.map((segment) => segment.text).join("\n"),
+      segments,
+    };
+  });
+}
+
+function orderStreamItems(input: {
+  items: StreamItem[];
+  platform: "web" | "native";
+}): StreamItem[] {
+  return input.platform === "native" ? [...input.items].toReversed() : input.items;
+}
+
+function splitOrderedHistory(input: {
+  orderedTail: StreamItem[];
+  platform: "web" | "native";
+  isMobileBreakpoint: boolean;
+}): {
+  historyVirtualizedItems: StreamItem[];
+  historyMountedItems: StreamItem[];
+} {
+  const shouldSplitHistory =
+    input.platform === "web" &&
+    !input.isMobileBreakpoint &&
+    input.orderedTail.length > getWebPartialVirtualizationThreshold();
+  if (!shouldSplitHistory) {
+    return {
+      historyVirtualizedItems: [],
+      historyMountedItems: input.orderedTail,
+    };
+  }
+  const mountedWindowStart = findMountedWindowStart({
+    items: input.orderedTail,
+    minMountedCount: getWebMountedRecentStreamItems(),
+  });
+  return {
+    historyVirtualizedItems: input.orderedTail.slice(0, mountedWindowStart),
+    historyMountedItems: input.orderedTail.slice(mountedWindowStart),
+  };
+}
+
+export function buildAgentStreamSearchModel(
+  input: BuildAgentStreamSearchModelInput,
+): AgentStreamSearchModel {
+  const tail = mergeOptimisticItems({
+    streamItems: input.streamItems,
+    optimisticItems: input.optimisticItems,
+  });
+  const orderedTail = orderStreamItems({
+    items: tail,
+    platform: input.platform,
+  });
+  const orderedHead = orderStreamItems({
+    items: input.streamHead,
+    platform: input.platform,
+  });
+  const splitHistory = splitOrderedHistory({
+    orderedTail,
+    platform: input.platform,
+    isMobileBreakpoint: input.isMobileBreakpoint,
+  });
+  const historyVirtualized = buildEntries({
+    items: splitHistory.historyVirtualizedItems,
+    source: "historyVirtualized",
+    startIndex: 0,
+    cwd: input.cwd,
+  });
+  const historyMounted = buildEntries({
+    items: splitHistory.historyMountedItems,
+    source: "historyMounted",
+    startIndex: historyVirtualized.length,
+    cwd: input.cwd,
+  });
+  const liveHead = buildEntries({
+    items: orderedHead,
+    source: "liveHead",
+    startIndex: historyVirtualized.length + historyMounted.length,
+    cwd: input.cwd,
+  });
+  return {
+    entries: [...historyVirtualized, ...historyMounted, ...liveHead],
+    segments: {
+      historyVirtualized,
+      historyMounted,
+      liveHead,
+    },
+  };
+}
+
+export function findAgentStreamSearchMatches(
+  input: FindAgentStreamSearchMatchesInput,
+): AgentStreamSearchMatch[] {
+  const normalizedQuery = input.query.toLocaleLowerCase();
+  if (!normalizedQuery) {
+    return [];
+  }
+
+  const matches: AgentStreamSearchMatch[] = [];
+  for (const entry of input.model.entries) {
+    for (const segment of entry.segments) {
+      const normalizedText = segment.text.toLocaleLowerCase();
+      let occurrenceIndex = 0;
+      let fromIndex = 0;
+      while (fromIndex <= normalizedText.length) {
+        const start = normalizedText.indexOf(normalizedQuery, fromIndex);
+        if (start < 0) {
+          break;
+        }
+        const end = start + input.query.length;
+        const absoluteStart = segment.startOffset + start;
+        const absoluteEnd = segment.startOffset + end;
+        matches.push({
+          id: `${entry.item.id}:${segment.key}:${occurrenceIndex}:${absoluteStart}:${absoluteEnd}`,
+          entry,
+          segmentKey: segment.key,
+          occurrenceIndex,
+          start: absoluteStart,
+          end: absoluteEnd,
+        });
+        occurrenceIndex += 1;
+        fromIndex = end;
+      }
+    }
+  }
+  return matches;
+}

packages/app/src/components/browser-pane.electron.test.tsx

@@ -0,0 +1,492 @@
+/**
+ * @vitest-environment jsdom
+ */
+import React from "react";
+import { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+import { BrowserPane } from "@/components/browser-pane.electron";
+import {
+  PaneFocusProvider,
+  PaneProvider,
+  createPaneFocusContextValue,
+  type PaneContextValue,
+} from "@/panels/pane-context";
+import {
+  createPaneFindPaneId,
+  handlePaneFindKeyboardAction,
+  setActivePaneFindPaneId,
+} from "@/panels/pane-find-registry";
+
+(globalThis as typeof globalThis & { IS_REACT_ACT_ENVIRONMENT: boolean }).IS_REACT_ACT_ENVIRONMENT =
+  true;
+
+const updateBrowser = vi.fn();
+let browserState = {
+  browsersById: {
+    "browser-a": {
+      id: "browser-a",
+      url: "https://example.com",
+      title: "",
+      faviconUrl: null,
+      canGoBack: false,
+      canGoForward: false,
+      isLoading: false,
+      lastError: null,
+    },
+  },
+  updateBrowser,
+};
+
+const { theme } = vi.hoisted(() => ({
+  theme: {
+    borderRadius: { md: 6 },
+    colors: {
+      accent: "#3b82f6",
+      border: "#333",
+      foreground: "#fff",
+      foregroundMuted: "#aaa",
+      palette: { red: { 500: "#ef4444" } },
+      surface0: "#111",
+      surface1: "#222",
+      surface2: "#333",
+    },
+    fontSize: { sm: 13, xs: 11 },
+    spacing: { 1: 4, 2: 8 },
+  },
+}));
+
+const desktopBridge = vi.hoisted(() => {
+  const foundInPageListeners = new Set<(result: unknown) => void>();
+  return {
+    foundInPageListeners,
+    findInPage: vi.fn<(browserId: string, text: string, options?: unknown) => number>(),
+    setActivePane: vi.fn<(browserId: string | null) => Promise<void>>(),
+    stopFindInPage: vi.fn<(browserId: string, action: string) => void>(),
+    onFoundInPage: vi.fn((_browserId: string, listener: (result: unknown) => void) => {
+      const scopedListener = (result: unknown) => listener(result);
+      foundInPageListeners.add(scopedListener);
+      return () => {
+        foundInPageListeners.delete(scopedListener);
+      };
+    }),
+    eventsOn: vi.fn(),
+  };
+});
+
+vi.mock("lucide-react-native", () => {
+  const createIcon = (name: string) =>
+    function Icon() {
+      return React.createElement("span", { "data-icon": name });
+    };
+
+  return {
+    ArrowLeft: createIcon("ArrowLeft"),
+    ArrowRight: createIcon("ArrowRight"),
+    ChevronDown: createIcon("ChevronDown"),
+    ChevronUp: createIcon("ChevronUp"),
+    MousePointer2: createIcon("MousePointer2"),
+    RotateCw: createIcon("RotateCw"),
+    X: createIcon("X"),
+  };
+});
+
+vi.mock("react-native", () => {
+  const MockView = ({
+    children,
+    testID,
+    style,
+  }: {
+    children?: React.ReactNode;
+    testID?: string;
+    style?: unknown;
+  }) => React.createElement("div", { "data-testid": testID, style }, children);
+  const MockText = ({ children }: { children?: React.ReactNode }) =>
+    React.createElement("span", null, children);
+  const MockPressable = ({
+    children,
+    disabled,
+    onPress,
+    testID,
+  }: {
+    children?: React.ReactNode;
+    disabled?: boolean;
+    onPress?: () => void;
+    testID?: string;
+  }) =>
+    React.createElement(
+      "button",
+      {
+        "data-testid": testID,
+        disabled,
+        onClick: () => {
+          if (!disabled) onPress?.();
+        },
+        type: "button",
+      },
+      children,
+    );
+  const MockTextInput = React.forwardRef<
+    HTMLInputElement,
+    {
+      value?: string;
+      onChangeText?: (text: string) => void;
+      onFocus?: () => void;
+      onKeyPress?: (event: {
+        nativeEvent: { key: string; shiftKey?: boolean };
+        preventDefault: () => void;
+      }) => void;
+      onSubmitEditing?: () => void;
+      testID?: string;
+      placeholder?: string;
+    }
+  >(function TextInput(
+    { value, onChangeText, onFocus, onKeyPress, onSubmitEditing, testID, placeholder },
+    ref,
+  ) {
+    return React.createElement("input", {
+      "data-testid": testID,
+      onChange: (event: React.ChangeEvent<HTMLInputElement>) =>
+        onChangeText?.(event.currentTarget.value),
+      onFocus,
+      onKeyDown: (event: React.KeyboardEvent<HTMLInputElement>) => {
+        onKeyPress?.({
+          nativeEvent: { key: event.key, shiftKey: event.shiftKey },
+          preventDefault: () => event.preventDefault(),
+        });
+        if (event.key === "Enter") {
+          onSubmitEditing?.();
+        }
+      },
+      placeholder,
+      ref,
+      value: value ?? "",
+    });
+  });
+
+  return {
+    Platform: {
+      OS: "web",
+      select: (options: Record<string, unknown>) => options.web ?? options.default,
+    },
+    Pressable: MockPressable,
+    Text: MockText,
+    TextInput: MockTextInput,
+    View: MockView,
+  };
+});
+
+vi.mock("react-native-unistyles", () => ({
+  StyleSheet: {
+    hairlineWidth: 1,
+    create: (factory: unknown) =>
+      typeof factory === "function" ? (factory as (t: typeof theme) => unknown)(theme) : factory,
+  },
+  useUnistyles: () => ({ theme }),
+}));
+
+vi.mock("@/attachments/workspace-attachments-store", () => ({
+  buildWorkspaceAttachmentScopeKey: () => "scope-a",
+  useWorkspaceAttachments: () => [],
+  useWorkspaceAttachmentsStore: (
+    selector: (state: { setWorkspaceAttachments: () => void }) => unknown,
+  ) => selector({ setWorkspaceAttachments: vi.fn() }),
+}));
+
+vi.mock("@/desktop/host", () => ({
+  getDesktopHost: () => ({
+    browser: {
+      findInPage: desktopBridge.findInPage,
+      onFoundInPage: desktopBridge.onFoundInPage,
+      setActivePane: desktopBridge.setActivePane,
+      stopFindInPage: desktopBridge.stopFindInPage,
+    },
+    events: { on: desktopBridge.eventsOn },
+  }),
+  isElectronRuntime: () => true,
+}));
+
+vi.mock("@/constants/layout", () => ({
+  WORKSPACE_SECONDARY_HEADER_HEIGHT: 36,
+}));
+
+vi.mock("@/stores/browser-store", () => ({
+  normalizeWorkspaceBrowserUrl: (url: string) => url,
+  useBrowserStore: (selector: (state: typeof browserState) => unknown) => selector(browserState),
+}));
+
+type FakeWebview = HTMLDivElement & {
+  getURL: ReturnType<typeof vi.fn<() => string>>;
+  canGoBack: ReturnType<typeof vi.fn<() => boolean>>;
+  canGoForward: ReturnType<typeof vi.fn<() => boolean>>;
+  reload: ReturnType<typeof vi.fn<() => void>>;
+  stop: ReturnType<typeof vi.fn<() => void>>;
+};
+
+let container: HTMLDivElement | null = null;
+let root: Root | null = null;
+let webview: FakeWebview | null = null;
+let nextRequestId = 1;
+let restoreCreateElement: (() => void) | null = null;
+
+const paneInstanceId = createPaneFindPaneId({
+  serverId: "server-a",
+  workspaceId: "workspace-a",
+  paneId: "pane-a",
+});
+
+const paneContextValue: PaneContextValue = {
+  serverId: "server-a",
+  workspaceId: "workspace-a",
+  paneInstanceId,
+  tabId: "browser_browser-a",
+  target: { kind: "browser", browserId: "browser-a" },
+  openTab: vi.fn(),
+  closeCurrentTab: vi.fn(),
+  retargetCurrentTab: vi.fn(),
+  openFileInWorkspace: vi.fn(),
+  openImportSheet: vi.fn(),
+};
+
+function installWebviewElementFactory(): void {
+  const originalCreateElement = document.createElement.bind(document);
+  const createElementSpy = vi.spyOn(document, "createElement");
+  const createElement = ((tagName: string, options?: ElementCreationOptions) => {
+    if (tagName.toLowerCase() !== "webview") {
+      return originalCreateElement(tagName, options);
+    }
+    const element = originalCreateElement("div") as FakeWebview;
+    element.getURL = vi.fn(() => "https://example.com");
+    element.canGoBack = vi.fn(() => false);
+    element.canGoForward = vi.fn(() => false);
+    element.reload = vi.fn();
+    element.stop = vi.fn();
+    webview = element;
+    return element;
+  }) as typeof document.createElement;
+  createElementSpy.mockImplementation(createElement);
+  restoreCreateElement = () => createElementSpy.mockRestore();
+}
+
+function renderBrowserPane(input?: { isInteractive?: boolean }): void {
+  act(() => {
+    root?.render(
+      <PaneProvider value={paneContextValue}>
+        <PaneFocusProvider
+          value={createPaneFocusContextValue({
+            isPaneFocused: input?.isInteractive ?? true,
+            isWorkspaceFocused: true,
+          })}
+        >
+          <BrowserPane
+            browserId="browser-a"
+            serverId="server-a"
+            workspaceId="workspace-a"
+            cwd="/repo"
+            isInteractive={input?.isInteractive ?? true}
+          />
+        </PaneFocusProvider>
+      </PaneProvider>,
+    );
+  });
+}
+
+function openFind(): void {
+  act(() => {
+    setActivePaneFindPaneId(paneInstanceId);
+    handlePaneFindKeyboardAction({ id: "workspace.find.open", scope: "workspace" });
+  });
+}
+
+function markWebviewDomReady(): void {
+  act(() => {
+    webview?.dispatchEvent(new Event("dom-ready"));
+  });
+}
+
+function inputElement(): HTMLInputElement {
+  const input = container?.querySelector('[data-testid="pane-find-input"]');
+  expect(input).toBeInstanceOf(HTMLInputElement);
+  return input as HTMLInputElement;
+}
+
+function changeInput(value: string): void {
+  const input = inputElement();
+  act(() => {
+    const valueSetter = Object.getOwnPropertyDescriptor(HTMLInputElement.prototype, "value")?.set;
+    valueSetter?.call(input, value);
+    input.dispatchEvent(new Event("input", { bubbles: true }));
+    input.dispatchEvent(new Event("change", { bubbles: true }));
+  });
+}
+
+function pressKey(key: string, shiftKey = false): void {
+  const input = inputElement();
+  act(() => {
+    input.dispatchEvent(new KeyboardEvent("keydown", { key, shiftKey, bubbles: true }));
+  });
+}
+
+function click(testId: string): void {
+  const element = container?.querySelector(`[data-testid="${testId}"]`);
+  expect(element).toBeInstanceOf(HTMLElement);
+  act(() => {
+    element?.dispatchEvent(new MouseEvent("click", { bubbles: true }));
+  });
+}
+
+function dispatchFoundInPage(result: {
+  requestId?: number;
+  activeMatchOrdinal: number;
+  matches: number;
+}): void {
+  act(() => {
+    for (const listener of desktopBridge.foundInPageListeners) {
+      listener(result);
+    }
+  });
+}
+
+beforeEach(() => {
+  updateBrowser.mockClear();
+  desktopBridge.findInPage.mockImplementation(() => nextRequestId++);
+  desktopBridge.findInPage.mockClear();
+  desktopBridge.onFoundInPage.mockClear();
+  desktopBridge.setActivePane.mockClear();
+  desktopBridge.stopFindInPage.mockClear();
+  desktopBridge.eventsOn.mockClear();
+  desktopBridge.foundInPageListeners.clear();
+  browserState = {
+    ...browserState,
+    browsersById: {
+      "browser-a": {
+        id: "browser-a",
+        url: "https://example.com",
+        title: "",
+        faviconUrl: null,
+        canGoBack: false,
+        canGoForward: false,
+        isLoading: false,
+        lastError: null,
+      },
+    },
+  };
+  nextRequestId = 1;
+  container = document.createElement("div");
+  document.body.appendChild(container);
+  root = createRoot(container);
+  installWebviewElementFactory();
+});
+
+afterEach(() => {
+  act(() => {
+    root?.unmount();
+  });
+  root = null;
+  container?.remove();
+  container = null;
+  webview = null;
+  restoreCreateElement?.();
+  restoreCreateElement = null;
+});
+
+describe("BrowserPane Electron find", () => {
+  it("registers browser find through the shared FindBar and desktop bridge find APIs", () => {
+    renderBrowserPane();
+    markWebviewDomReady();
+    openFind();
+
+    changeInput("needle");
+
+    expect(desktopBridge.onFoundInPage).toHaveBeenCalledWith("browser-a", expect.any(Function));
+    expect(desktopBridge.findInPage).toHaveBeenLastCalledWith("browser-a", "needle", {
+      forward: true,
+      findNext: false,
+      matchCase: false,
+    });
+    expect(container?.textContent).toContain("Searching...");
+    dispatchFoundInPage({ requestId: 1, activeMatchOrdinal: 2, matches: 5 });
+    expect(container?.textContent).toContain("2 / 5");
+
+    pressKey("Enter");
+    expect(desktopBridge.findInPage).toHaveBeenLastCalledWith("browser-a", "needle", {
+      forward: true,
+      findNext: true,
+      matchCase: false,
+    });
+    dispatchFoundInPage({ requestId: 2, activeMatchOrdinal: 3, matches: 5 });
+
+    pressKey("Enter", true);
+    expect(desktopBridge.findInPage).toHaveBeenLastCalledWith("browser-a", "needle", {
+      forward: false,
+      findNext: true,
+      matchCase: false,
+    });
+
+    click("pane-find-close");
+
+    expect(desktopBridge.stopFindInPage).toHaveBeenLastCalledWith("browser-a", "clearSelection");
+    expect(container?.querySelector('[data-testid="pane-find-input"]')).toBeNull();
+  });
+
+  it("cleans browser find selection on empty query, navigation, blur, and unmount", () => {
+    renderBrowserPane();
+    markWebviewDomReady();
+    openFind();
+    changeInput("needle");
+    dispatchFoundInPage({ requestId: 1, activeMatchOrdinal: 1, matches: 3 });
+
+    changeInput("");
+    expect(desktopBridge.stopFindInPage).toHaveBeenLastCalledWith("browser-a", "clearSelection");
+    expect(container?.textContent).toContain("0 / 0");
+    dispatchFoundInPage({ activeMatchOrdinal: 2, matches: 9 });
+    expect(container?.textContent).toContain("0 / 0");
+
+    changeInput("needle");
+    expect(container?.textContent).toContain("Searching...");
+    act(() => {
+      webview?.dispatchEvent(new Event("did-start-loading"));
+    });
+    expect(desktopBridge.stopFindInPage).toHaveBeenLastCalledWith("browser-a", "clearSelection");
+    expect(container?.textContent).toContain("0 / 0");
+
+    act(() => {
+      webview?.dispatchEvent(new Event("dom-ready"));
+    });
+    expect(desktopBridge.findInPage).toHaveBeenLastCalledWith("browser-a", "needle", {
+      forward: true,
+      findNext: false,
+      matchCase: false,
+    });
+
+    renderBrowserPane({ isInteractive: false });
+    expect(desktopBridge.stopFindInPage).toHaveBeenLastCalledWith("browser-a", "clearSelection");
+
+    act(() => {
+      root?.unmount();
+    });
+    expect(desktopBridge.stopFindInPage).toHaveBeenLastCalledWith("browser-a", "clearSelection");
+    expect(desktopBridge.foundInPageListeners.size).toBe(0);
+  });
+
+  it("does not call the browser find bridge before dom-ready", () => {
+    renderBrowserPane();
+    openFind();
+
+    changeInput("needle");
+    expect(container?.textContent).toContain("Searching...");
+    expect(desktopBridge.findInPage).not.toHaveBeenCalled();
+
+    click("pane-find-close");
+    expect(desktopBridge.stopFindInPage).not.toHaveBeenCalled();
+
+    openFind();
+    changeInput("needle");
+    markWebviewDomReady();
+    expect(desktopBridge.findInPage).toHaveBeenLastCalledWith("browser-a", "needle", {
+      forward: true,
+      findNext: false,
+      matchCase: false,
+    });
+  });
+});

packages/app/src/components/browser-pane.electron.tsx

@@ -1,4 +1,4 @@
-import {
+import React, {
   useCallback,
   useEffect,
   useMemo,
@@ -20,9 +20,12 @@ import { WORKSPACE_SECONDARY_HEADER_HEIGHT } from "@/constants/layout";
 import {
   getDesktopHost,
   isElectronRuntime,
+  type DesktopBrowserFoundInPageResult,
+  type DesktopBrowserFindAction,
   type DesktopBrowserShortcutEvent,
 } from "@/desktop/host";
 import { isDev } from "@/constants/platform";
+import { FindBar, usePaneFind, type PaneFindMatchState } from "@/panels/pane-find";
 import { useBrowserStore, normalizeWorkspaceBrowserUrl } from "@/stores/browser-store";
 
 type ElectronWebview = HTMLElement & {
@@ -50,6 +53,15 @@ type BrowserElementSelection = Omit<BrowserElementAttachment, "formatted"> & {
 
 const ERR_ABORTED = -3;
 const ALLOWED_BROWSER_PROTOCOLS = new Set(["http:", "https:"]);
+const EMPTY_FIND_MATCH_STATE: PaneFindMatchState = { status: "empty" };
+const NO_FIND_MATCH_STATE: PaneFindMatchState = { status: "no-match" };
+const PENDING_FIND_MATCH_STATE: PaneFindMatchState = { status: "pending" };
+
+interface ActiveBrowserFind {
+  generation: number;
+  query: string;
+  requestId: number | null;
+}
 
 function truncateText(value: string, maxLength: number): string {
   return value.length > maxLength ? `${value.slice(0, maxLength).trim()}...` : value;
@@ -234,6 +246,18 @@ function isDesktopBrowserShortcutEvent(payload: unknown): payload is DesktopBrow
   return event.action === "focus-url";
 }
 
+function stopBrowserFindInPage(input: {
+  browserId: string;
+  action: DesktopBrowserFindAction;
+}): void {
+  const bridge = getDesktopHost()?.browser;
+  if (!bridge?.stopFindInPage) {
+    console.warn("Electron browser find bridge is unavailable; cannot stop find-in-page.");
+    return;
+  }
+  void bridge.stopFindInPage(input.browserId, input.action);
+}
+
 function startSelectorResultPolling(input: {
   webview: ElectronWebview;
   onSelection: (selection: BrowserElementSelection) => void;
@@ -295,7 +319,13 @@ export function BrowserPane({
   browserRef.current = browser;
   const pendingNavigationUrlRef = useRef<string | null>(null);
   const domReadyRef = useRef(false);
+  const browserFindQueryRef = useRef("");
+  const browserFindGenerationRef = useRef(0);
+  const activeBrowserFindRef = useRef<ActiveBrowserFind | null>(null);
+  const browserFindOpenRef = useRef(false);
   const [selectorActive, setSelectorActive] = useState(false);
+  const [browserFindMatchState, setBrowserFindMatchState] =
+    useState<PaneFindMatchState>(EMPTY_FIND_MATCH_STATE);
   const [draftUrl, setDraftUrl] = useState(browser?.url ?? "https://example.com");
   const workspaceAttachmentScopeKey = useMemo(
     () => buildBrowserAttachmentScopeKey({ cwd, serverId, workspaceId }),
@@ -372,6 +402,115 @@ export function BrowserPane({
     }
   }, []);
 
+  const clearBrowserFindSelection = useCallback((input?: { resetQuery?: boolean }) => {
+    if (input?.resetQuery) {
+      browserFindQueryRef.current = "";
+    }
+    browserFindGenerationRef.current += 1;
+    activeBrowserFindRef.current = null;
+    setBrowserFindMatchState(EMPTY_FIND_MATCH_STATE);
+    if (domReadyRef.current) {
+      stopBrowserFindInPage({
+        browserId: browserIdRef.current,
+        action: "clearSelection",
+      });
+    }
+  }, []);
+
+  const runBrowserFind = useCallback(
+    (query: string, direction: "next" | "previous", input?: { reset?: boolean }) => {
+      browserFindQueryRef.current = query;
+      if (!query) {
+        clearBrowserFindSelection({ resetQuery: true });
+        return;
+      }
+
+      if (!domReadyRef.current) {
+        setBrowserFindMatchState(PENDING_FIND_MATCH_STATE);
+        return;
+      }
+      const bridgeFindInPage = getDesktopHost()?.browser?.findInPage;
+      if (!bridgeFindInPage) {
+        console.warn("Electron browser find bridge is unavailable; cannot start find-in-page.");
+        setBrowserFindMatchState(NO_FIND_MATCH_STATE);
+        return;
+      }
+
+      const generation = (browserFindGenerationRef.current += 1);
+      activeBrowserFindRef.current = {
+        generation,
+        query,
+        requestId: null,
+      };
+      setBrowserFindMatchState(PENDING_FIND_MATCH_STATE);
+
+      const options = {
+        forward: direction === "next",
+        findNext: !input?.reset,
+        matchCase: false,
+      };
+      const requestIdResult = bridgeFindInPage(browserIdRef.current, query, options);
+      if (typeof requestIdResult === "number") {
+        activeBrowserFindRef.current = {
+          generation,
+          query,
+          requestId: requestIdResult,
+        };
+        return;
+      }
+      void Promise.resolve(requestIdResult ?? null).then((requestId) => {
+        const activeFind = activeBrowserFindRef.current;
+        if (
+          !activeFind ||
+          activeFind.generation !== generation ||
+          activeFind.query !== browserFindQueryRef.current
+        ) {
+          return undefined;
+        }
+        activeBrowserFindRef.current = {
+          ...activeFind,
+          requestId: typeof requestId === "number" ? requestId : null,
+        };
+        return undefined;
+      });
+    },
+    [clearBrowserFindSelection],
+  );
+
+  const handleFoundInPageResult = useCallback((result: DesktopBrowserFoundInPageResult) => {
+    const activeFind = activeBrowserFindRef.current;
+    if (
+      !activeFind ||
+      activeFind.generation !== browserFindGenerationRef.current ||
+      activeFind.query !== browserFindQueryRef.current
+    ) {
+      return;
+    }
+    const requestId = result.requestId;
+    if (typeof requestId !== "number") {
+      return;
+    }
+    if (typeof activeFind.requestId !== "number" || requestId !== activeFind.requestId) {
+      return;
+    }
+
+    const total = typeof result.matches === "number" ? Math.max(0, result.matches) : 0;
+    if (total === 0) {
+      setBrowserFindMatchState(NO_FIND_MATCH_STATE);
+      return;
+    }
+
+    const current =
+      typeof result.activeMatchOrdinal === "number" && result.activeMatchOrdinal > 0
+        ? result.activeMatchOrdinal
+        : 1;
+    setBrowserFindMatchState({
+      status: "matched",
+      current: Math.min(current, total),
+      total,
+    });
+  }, []);
+
   useEffect(() => {
     if (!isElectronRuntime()) {
       return;
@@ -403,6 +542,7 @@ export function BrowserPane({
     webview.style.background = "transparent";
 
     const handleStartLoading = () => {
+      clearBrowserFindSelection();
       updateBrowser(browserId, { isLoading: true, lastError: null });
       syncNavigationState({ syncUrl: false });
     };
@@ -429,6 +569,7 @@ export function BrowserPane({
       syncNavigationState();
     };
     const handleWillNavigate = (event: Event) => {
+      clearBrowserFindSelection();
       const nextUrl =
         typeof (event as Event & { url?: unknown }).url === "string"
           ? ((event as Event & { url?: string }).url ?? "")
@@ -471,6 +612,9 @@ export function BrowserPane({
     const handleDomReady = () => {
       domReadyRef.current = true;
       syncNavigationState();
+      if (browserFindOpenRef.current && browserFindQueryRef.current) {
+        runBrowserFind(browserFindQueryRef.current, "next", { reset: true });
+      }
     };
     const handleWebviewFocus = () => {
       onFocusPane?.();
@@ -488,6 +632,29 @@ export function BrowserPane({
     webview.addEventListener("focus", handleWebviewFocus);
     webview.addEventListener("mousedown", handleWebviewFocus);
 
+    const foundInPageBridge = getDesktopHost()?.browser?.onFoundInPage;
+    let unsubscribeFoundInPage: (() => void) | null = null;
+    let didCleanupFoundInPage = false;
+    if (foundInPageBridge) {
+      const unsubscribeResult = foundInPageBridge(browserId, (result) => {
+        handleFoundInPageResult(result);
+      });
+      if (typeof unsubscribeResult === "function") {
+        unsubscribeFoundInPage = unsubscribeResult;
+      } else {
+        void Promise.resolve(unsubscribeResult).then((unsubscribe) => {
+          if (didCleanupFoundInPage) {
+            unsubscribe();
+            return undefined;
+          }
+          unsubscribeFoundInPage = unsubscribe;
+          return undefined;
+        });
+      }
+    } else {
+      console.warn("Electron browser find bridge is unavailable; found-in-page events disabled.");
+    }
+
     host.appendChild(webview);
     if (initialUnsafeNavigationMessage) {
       updateBrowserRef.current(browserIdRef.current, {
@@ -506,8 +673,16 @@ export function BrowserPane({
       webview.removeEventListener("page-favicon-updated", handleFaviconUpdated);
       webview.removeEventListener("did-fail-load", handleLoadFailed);
       webview.removeEventListener("dom-ready", handleDomReady);
+      didCleanupFoundInPage = true;
+      unsubscribeFoundInPage?.();
       webview.removeEventListener("focus", handleWebviewFocus);
       webview.removeEventListener("mousedown", handleWebviewFocus);
+      if (domReadyRef.current) {
+        stopBrowserFindInPage({
+          browserId: browserIdRef.current,
+          action: "clearSelection",
+        });
+      }
       if (host.contains(webview)) {
         host.removeChild(webview);
       }
@@ -519,6 +694,35 @@ export function BrowserPane({
     // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [browserId, onFocusPane]);
 
+  const paneFind = usePaneFind({
+    matchState: browserFindMatchState,
+    onQuery: (query) => runBrowserFind(query, "next", { reset: true }),
+    onNext: () => runBrowserFind(browserFindQueryRef.current, "next"),
+    onPrev: () => runBrowserFind(browserFindQueryRef.current, "previous"),
+    onClose: () => clearBrowserFindSelection({ resetQuery: true }),
+  });
+
+  useEffect(() => {
+    browserFindOpenRef.current = paneFind.isOpen;
+    if (!paneFind.isOpen) {
+      clearBrowserFindSelection({ resetQuery: true });
+    }
+  }, [clearBrowserFindSelection, paneFind.isOpen]);
+
+  useEffect(() => {
+    if (isInteractive) {
+      if (paneFind.isOpen && browserFindQueryRef.current) {
+        runBrowserFind(browserFindQueryRef.current, "next", { reset: true });
+      }
+      return;
+    }
+    clearBrowserFindSelection();
+  }, [clearBrowserFindSelection, isInteractive, paneFind.isOpen, runBrowserFind]);
+
+  useEffect(() => {
+    return () => clearBrowserFindSelection({ resetQuery: true });
+  }, [clearBrowserFindSelection]);
+
   const navigate = useCallback((nextUrl: string) => {
     const normalizedUrl = normalizeWorkspaceBrowserUrl(nextUrl);
     const webview = webviewRef.current;
@@ -939,6 +1143,7 @@ export function BrowserPane({
 
   return (
     <View style={styles.container}>
+      {paneFind.isOpen ? <FindBar {...paneFind.findBarProps} /> : null}
       <View style={styles.chromeRow}>
         <View style={styles.chromeLeft}>
           <Pressable

packages/app/src/components/file-pane-text-render-data.test.ts

@@ -0,0 +1,120 @@
+import { describe, expect, it } from "vitest";
+import {
+  createFilePaneFindTokenSegments,
+  createFilePaneLineFindHighlightMap,
+  createFilePaneTextRenderData,
+  findFilePaneTextMatches,
+} from "@/components/file-pane-text-render-data";
+
+type FilePaneTextLineRenderData = ReturnType<typeof createFilePaneTextRenderData>["lines"][number];
+
+function tokenText(line: FilePaneTextLineRenderData): string {
+  return line.tokens.map(({ text }) => text).join("");
+}
+
+describe("createFilePaneTextRenderData", () => {
+  it("keeps code render lines in source order and reconstructs searchable text from tokens", () => {
+    const renderData = createFilePaneTextRenderData(
+      "const answer = 42;\nconsole.log(answer);",
+      "src/answer.ts",
+    );
+
+    expect(renderData.lines.map((line) => line.lineNumber)).toEqual([1, 2]);
+    expect(renderData.lines.map((line) => line.text)).toEqual([
+      "const answer = 42;",
+      "console.log(answer);",
+    ]);
+    expect(renderData.searchableText).toBe("const answer = 42;\nconsole.log(answer);");
+    const tokenTexts = renderData.lines.map(tokenText);
+    expect(tokenTexts).toEqual(renderData.lines.map((line) => line.text));
+  });
+
+  it("preserves blank text lines for navigation and scrolling targets", () => {
+    const renderData = createFilePaneTextRenderData("alpha\n\nbeta", "notes.txt");
+
+    expect(
+      renderData.lines.map((line) => ({ lineNumber: line.lineNumber, text: line.text })),
+    ).toEqual([
+      { lineNumber: 1, text: "alpha" },
+      { lineNumber: 2, text: "" },
+      { lineNumber: 3, text: "beta" },
+    ]);
+    expect(renderData.searchableText).toBe("alpha\n\nbeta");
+  });
+});
+
+describe("findFilePaneTextMatches", () => {
+  it("indexes loaded text case-insensitively in source order", () => {
+    const renderData = createFilePaneTextRenderData(
+      "Alpha beta\nBETA gamma\nalphabet",
+      "notes.txt",
+    );
+
+    const matches = findFilePaneTextMatches(renderData, "beta");
+
+    expect(
+      matches.map((match) => ({
+        index: match.index,
+        lineSpans: match.lineSpans,
+      })),
+    ).toEqual([
+      {
+        index: 0,
+        lineSpans: [{ lineNumber: 1, startColumn: 6, endColumn: 10 }],
+      },
+      {
+        index: 1,
+        lineSpans: [{ lineNumber: 2, startColumn: 0, endColumn: 4 }],
+      },
+    ]);
+  });
+
+  it("maps pasted multi-line queries back to per-line spans", () => {
+    const renderData = createFilePaneTextRenderData("alpha\nbeta", "notes.txt");
+
+    const matches = findFilePaneTextMatches(renderData, "ha\nbe");
+
+    expect(matches).toHaveLength(1);
+    expect(matches[0]?.lineSpans).toEqual([
+      { lineNumber: 1, startColumn: 3, endColumn: 5 },
+      { lineNumber: 2, startColumn: 0, endColumn: 2 },
+    ]);
+  });
+});
+
+describe("createFilePaneFindTokenSegments", () => {
+  it("splits immutable token render data around match spans and marks the current match", () => {
+    const line: FilePaneTextLineRenderData = {
+      lineNumber: 1,
+      text: "const answer",
+      tokens: [
+        { text: "const", style: "keyword" },
+        { text: " answer", style: null },
+      ],
+    };
+    const highlights = createFilePaneLineFindHighlightMap(
+      [
+        {
+          index: 0,
+          startOffset: 2,
+          endOffset: 8,
+          lineSpans: [{ lineNumber: 1, startColumn: 2, endColumn: 8 }],
+        },
+      ],
+      0,
+    );
+
+    const segments = createFilePaneFindTokenSegments(line, highlights.get(1) ?? []);
+
+    expect(segments).toEqual([
+      { text: "co", style: "keyword", isFindMatch: false, isCurrentFindMatch: false },
+      { text: "nst", style: "keyword", isFindMatch: true, isCurrentFindMatch: true },
+      { text: " an", style: null, isFindMatch: true, isCurrentFindMatch: true },
+      { text: "swer", style: null, isFindMatch: false, isCurrentFindMatch: false },
+    ]);
+    expect(line.tokens).toEqual([
+      { text: "const", style: "keyword" },
+      { text: " answer", style: null },
+    ]);
+  });
+});

packages/app/src/components/file-pane-text-render-data.ts

@@ -0,0 +1,198 @@
+import { highlightCode, type HighlightToken } from "@getpaseo/highlight";
+
+interface FilePaneTextLineRenderData {
+  lineNumber: number;
+  text: string;
+  tokens: HighlightToken[];
+}
+
+interface FilePaneTextRenderData {
+  lines: FilePaneTextLineRenderData[];
+  searchableText: string;
+}
+
+interface FilePaneFindLineSpan {
+  lineNumber: number;
+  startColumn: number;
+  endColumn: number;
+}
+
+export interface FilePaneFindMatch {
+  index: number;
+  startOffset: number;
+  endOffset: number;
+  lineSpans: FilePaneFindLineSpan[];
+}
+
+export interface FilePaneFindLineHighlight extends FilePaneFindLineSpan {
+  matchIndex: number;
+  isCurrent: boolean;
+}
+
+export interface FilePaneFindTokenSegment {
+  text: string;
+  style: HighlightToken["style"];
+  isFindMatch: boolean;
+  isCurrentFindMatch: boolean;
+}
+
+export function createFilePaneTextRenderData(
+  content: string,
+  filePath: string,
+): FilePaneTextRenderData {
+  const lines = highlightCode(content, filePath).map((tokens, index) => ({
+    lineNumber: index + 1,
+    text: tokens.map((token) => token.text).join(""),
+    tokens,
+  }));
+
+  return {
+    lines,
+    searchableText: lines.map((line) => line.text).join("\n"),
+  };
+}
+
+export function findFilePaneTextMatches(
+  renderData: FilePaneTextRenderData,
+  query: string,
+): FilePaneFindMatch[] {
+  if (query.length === 0) {
+    return [];
+  }
+
+  const searchableText = renderData.searchableText.toLocaleLowerCase();
+  const normalizedQuery = query.toLocaleLowerCase();
+  const matches: FilePaneFindMatch[] = [];
+  let nextOffset = searchableText.indexOf(normalizedQuery);
+
+  while (nextOffset >= 0) {
+    const endOffset = nextOffset + normalizedQuery.length;
+    matches.push({
+      index: matches.length,
+      startOffset: nextOffset,
+      endOffset,
+      lineSpans: mapFilePaneTextRangeToLineSpans(renderData, nextOffset, endOffset),
+    });
+    nextOffset = searchableText.indexOf(normalizedQuery, endOffset);
+  }
+
+  return matches;
+}
+
+export function createFilePaneLineFindHighlightMap(
+  matches: FilePaneFindMatch[],
+  currentMatchIndex: number,
+): Map<number, FilePaneFindLineHighlight[]> {
+  const highlightsByLine = new Map<number, FilePaneFindLineHighlight[]>();
+
+  for (const match of matches) {
+    for (const span of match.lineSpans) {
+      const highlights = highlightsByLine.get(span.lineNumber) ?? [];
+      highlights.push({
+        ...span,
+        matchIndex: match.index,
+        isCurrent: match.index === currentMatchIndex,
+      });
+      highlightsByLine.set(span.lineNumber, highlights);
+    }
+  }
+
+  for (const highlights of highlightsByLine.values()) {
+    highlights.sort((left, right) => left.startColumn - right.startColumn);
+  }
+
+  return highlightsByLine;
+}
+
+export function createFilePaneFindTokenSegments(
+  line: FilePaneTextLineRenderData,
+  highlights: FilePaneFindLineHighlight[],
+): FilePaneFindTokenSegment[] {
+  if (highlights.length === 0) {
+    return line.tokens.map((token) => ({
+      ...token,
+      isFindMatch: false,
+      isCurrentFindMatch: false,
+    }));
+  }
+
+  const segments: FilePaneFindTokenSegment[] = [];
+  let tokenStartColumn = 0;
+
+  for (const token of line.tokens) {
+    let cursor = tokenStartColumn;
+    const tokenEndColumn = tokenStartColumn + token.text.length;
+    const tokenHighlights = highlights.filter(
+      (highlight) =>
+        highlight.startColumn < tokenEndColumn && highlight.endColumn > tokenStartColumn,
+    );
+
+    for (const highlight of tokenHighlights) {
+      const highlightStart = Math.max(highlight.startColumn, tokenStartColumn);
+      const highlightEnd = Math.min(highlight.endColumn, tokenEndColumn);
+
+      if (cursor < highlightStart) {
+        segments.push({
+          text: token.text.slice(cursor - tokenStartColumn, highlightStart - tokenStartColumn),
+          style: token.style,
+          isFindMatch: false,
+          isCurrentFindMatch: false,
+        });
+      }
+
+      if (highlightStart < highlightEnd) {
+        segments.push({
+          text: token.text.slice(
+            highlightStart - tokenStartColumn,
+            highlightEnd - tokenStartColumn,
+          ),
+          style: token.style,
+          isFindMatch: true,
+          isCurrentFindMatch: highlight.isCurrent,
+        });
+      }
+
+      cursor = highlightEnd;
+    }
+
+    if (cursor < tokenEndColumn) {
+      segments.push({
+        text: token.text.slice(cursor - tokenStartColumn),
+        style: token.style,
+        isFindMatch: false,
+        isCurrentFindMatch: false,
+      });
+    }
+
+    tokenStartColumn = tokenEndColumn;
+  }
+
+  return segments;
+}
+
+function mapFilePaneTextRangeToLineSpans(
+  renderData: FilePaneTextRenderData,
+  startOffset: number,
+  endOffset: number,
+): FilePaneFindLineSpan[] {
+  const spans: FilePaneFindLineSpan[] = [];
+  let lineStartOffset = 0;
+
+  for (const line of renderData.lines) {
+    const lineEndOffset = lineStartOffset + line.text.length;
+    const spanStartOffset = Math.max(startOffset, lineStartOffset);
+    const spanEndOffset = Math.min(endOffset, lineEndOffset);
+
+    if (spanStartOffset < spanEndOffset) {
+      spans.push({
+        lineNumber: line.lineNumber,
+        startColumn: spanStartOffset - lineStartOffset,
+        endColumn: spanEndOffset - lineStartOffset,
+      });
+    }
+
+    lineStartOffset = lineEndOffset + 1;
+  }
+
+  return spans;
+}

packages/app/src/components/file-pane.test.tsx

@@ -0,0 +1,435 @@
+/**
+ * @vitest-environment jsdom
+ */
+import React from "react";
+import { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+import type { ExplorerFile } from "@/stores/session-store";
+import { FilePane } from "@/components/file-pane";
+import {
+  PaneFocusProvider,
+  PaneProvider,
+  createPaneFocusContextValue,
+  type PaneContextValue,
+} from "@/panels/pane-context";
+import {
+  clearActivePaneFindPaneId,
+  handlePaneFindKeyboardAction,
+  setActivePaneFindPaneId,
+} from "@/panels/pane-find-registry";
+
+const { queryState, theme } = vi.hoisted(() => ({
+  queryState: {
+    current: {
+      data: null as null | {
+        error: string | null;
+        file: ExplorerFile | null;
+        imageAttachment?: unknown;
+      },
+      isFetching: false,
+    },
+  },
+  theme: {
+    spacing: { 1: 4, 2: 8, 3: 12, 4: 16 },
+    fontSize: { sm: 13, code: 13 },
+    colors: {
+      destructive: "#f43f5e",
+      foreground: "#fff",
+      foregroundMuted: "#aaa",
+      primary: "#0a84ff",
+      surface0: "#111",
+      surface1: "#222",
+      surface2: "#333",
+    },
+    colorScheme: "dark",
+  },
+}));
+
+vi.mock("@tanstack/react-query", () => ({
+  useQuery: () => queryState.current,
+}));
+
+vi.mock("react-native", () => {
+  const MockView = React.forwardRef<
+    HTMLDivElement,
+    { children?: React.ReactNode; testID?: string }
+  >(function View({ children, testID }, ref) {
+    return React.createElement("div", { "data-testid": testID, ref }, children);
+  });
+  const MockScrollView = React.forwardRef<
+    HTMLDivElement,
+    { children?: React.ReactNode; horizontal?: boolean }
+  >(function ScrollView({ children, horizontal }, ref) {
+    return React.createElement(
+      "div",
+      { "data-horizontal": horizontal ? "true" : undefined, ref },
+      children,
+    );
+  });
+  const flattenMockStyle = (value: unknown): React.CSSProperties => {
+    if (Array.isArray(value)) {
+      return value.reduce<React.CSSProperties>(
+        (acc, item) => Object.assign(acc, flattenMockStyle(item)),
+        {},
+      );
+    }
+    return (value as React.CSSProperties | null | undefined) ?? {};
+  };
+  const MockText = ({ children, style }: { children?: React.ReactNode; style?: unknown }) =>
+    React.createElement("span", { style: flattenMockStyle(style) }, children);
+  const MockPressable = ({
+    children,
+    disabled,
+    onPress,
+    testID,
+  }: {
+    children?: React.ReactNode;
+    disabled?: boolean;
+    onPress?: () => void;
+    testID?: string;
+  }) =>
+    React.createElement(
+      "button",
+      {
+        "data-testid": testID,
+        disabled,
+        onClick: () => {
+          if (!disabled) {
+            onPress?.();
+          }
+        },
+        type: "button",
+      },
+      children,
+    );
+  const MockTextInput = React.forwardRef<
+    HTMLInputElement,
+    {
+      value?: string;
+      onChangeText?: (text: string) => void;
+      onKeyPress?: (event: {
+        nativeEvent: { key: string; shiftKey?: boolean };
+        preventDefault: () => void;
+      }) => void;
+      testID?: string;
+      placeholder?: string;
+    }
+  >(function TextInput({ value, onChangeText, onKeyPress, testID, placeholder }, ref) {
+    return React.createElement("input", {
+      "data-testid": testID,
+      onChange: (event: React.ChangeEvent<HTMLInputElement>) =>
+        onChangeText?.(event.currentTarget.value),
+      onKeyDown: (event: React.KeyboardEvent<HTMLInputElement>) =>
+        onKeyPress?.({
+          nativeEvent: { key: event.key, shiftKey: event.shiftKey },
+          preventDefault: () => event.preventDefault(),
+        }),
+      placeholder,
+      ref,
+      value: value ?? "",
+    });
+  });
+  const MockImage = ({ source }: { source?: { uri?: string } }) =>
+    React.createElement("img", { alt: "", src: source?.uri ?? "" });
+
+  return {
+    ActivityIndicator: () => React.createElement("span", { "data-testid": "activity" }),
+    Image: MockImage,
+    Platform: {
+      OS: "web",
+      select: (options: Record<string, unknown>) => options.web ?? options.default,
+    },
+    Pressable: MockPressable,
+    ScrollView: MockScrollView,
+    Text: MockText,
+    TextInput: MockTextInput,
+    View: MockView,
+  };
+});
+
+vi.mock("lucide-react-native", () => {
+  const createIcon = (name: string) =>
+    function Icon() {
+      return React.createElement("span", { "data-icon": name });
+    };
+  return {
+    ChevronDown: createIcon("ChevronDown"),
+    ChevronUp: createIcon("ChevronUp"),
+    X: createIcon("X"),
+  };
+});
+
+vi.mock("react-native-markdown-display", () => ({
+  default: ({ children }: { children?: React.ReactNode }) =>
+    React.createElement("article", { "data-testid": "markdown-preview" }, children),
+  MarkdownIt: () => ({}),
+}));
+
+vi.mock("react-native-unistyles", () => ({
+  StyleSheet: {
+    create: (factory: unknown) =>
+      typeof factory === "function" ? (factory as (t: typeof theme) => unknown)(theme) : factory,
+  },
+  useUnistyles: () => ({ theme }),
+}));
+
+vi.mock("@/styles/syntax-token-styles", () => ({
+  syntaxTokenStyleFor: () => ({ color: "#fff" }),
+}));
+
+vi.mock("@/attachments/use-attachment-preview-url", () => ({
+  useAttachmentPreviewUrl: (metadata: unknown) => (metadata ? "blob:preview" : null),
+}));
+
+vi.mock("@/components/use-web-scrollbar", () => ({
+  useWebScrollViewScrollbar: () => ({
+    onContentSizeChange: vi.fn(),
+    onLayout: vi.fn(),
+    onScroll: vi.fn(),
+    overlay: null,
+  }),
+}));
+
+vi.mock("@/hooks/use-web-scrollbar-style", () => ({
+  useWebScrollbarStyle: () => ({}),
+}));
+
+vi.mock("@/constants/layout", () => ({
+  useIsCompactFormFactor: () => false,
+}));
+
+vi.mock("@/constants/platform", () => ({
+  isWeb: true,
+}));
+
+vi.mock("@/styles/markdown-styles", () => ({
+  createMarkdownStyles: () => ({}),
+}));
+
+vi.mock("@/stores/session-store", () => ({
+  useSessionStore: (selector: (state: unknown) => unknown) => selector({ sessions: {} }),
+}));
+
+let root: Root | null = null;
+let container: HTMLElement | null = null;
+const paneInstanceId = "server:workspace:file";
+const paneContext: PaneContextValue = {
+  serverId: "server",
+  workspaceId: "workspace",
+  paneInstanceId,
+  tabId: "file",
+  target: { kind: "file", path: "src/example.ts" },
+  openTab: () => {},
+  closeCurrentTab: () => {},
+  retargetCurrentTab: () => {},
+  openFileInWorkspace: () => {},
+  openImportSheet: () => {},
+};
+const paneFocus = createPaneFocusContextValue({
+  isPaneFocused: true,
+  isWorkspaceFocused: true,
+});
+
+beforeEach(() => {
+  vi.stubGlobal("IS_REACT_ACT_ENVIRONMENT", true);
+  vi.stubGlobal("requestAnimationFrame", (callback: FrameRequestCallback) => {
+    callback(0);
+    return 1;
+  });
+  HTMLElement.prototype.scrollIntoView = vi.fn();
+  container = document.createElement("div");
+  document.body.appendChild(container);
+  root = createRoot(container);
+});
+
+afterEach(() => {
+  if (root) {
+    act(() => {
+      root?.unmount();
+    });
+  }
+  clearActivePaneFindPaneId(paneInstanceId);
+  root = null;
+  container?.remove();
+  container = null;
+  queryState.current = { data: null, isFetching: false };
+  vi.unstubAllGlobals();
+});
+
+function renderFilePane(location: { path: string } = { path: "src/example.ts" }) {
+  act(() => {
+    root?.render(
+      <PaneProvider value={paneContext}>
+        <PaneFocusProvider value={paneFocus}>
+          <FilePane serverId="server" workspaceRoot="/repo" location={location} />
+        </PaneFocusProvider>
+      </PaneProvider>,
+    );
+  });
+  setActivePaneFindPaneId(paneInstanceId);
+}
+
+function inputElement(): HTMLInputElement {
+  const input = container?.querySelector('[data-testid="pane-find-input"]');
+  expect(input).toBeInstanceOf(HTMLInputElement);
+  return input as HTMLInputElement;
+}
+
+function changeInput(value: string): void {
+  const input = inputElement();
+  act(() => {
+    const valueSetter = Object.getOwnPropertyDescriptor(HTMLInputElement.prototype, "value")?.set;
+    valueSetter?.call(input, value);
+    input.dispatchEvent(new Event("input", { bubbles: true }));
+    input.dispatchEvent(new Event("change", { bubbles: true }));
+  });
+}
+
+function click(testId: string): void {
+  const element = container?.querySelector(`[data-testid="${testId}"]`);
+  expect(element).toBeInstanceOf(HTMLElement);
+  act(() => {
+    element?.dispatchEvent(new MouseEvent("click", { bubbles: true }));
+  });
+}
+
+function makeFile(file: Partial<ExplorerFile>): ExplorerFile {
+  return {
+    content: "",
+    encoding: "utf-8",
+    kind: "text",
+    modifiedAt: "2026-05-02T00:00:00.000Z",
+    path: file.path ?? "src/example.ts",
+    size: file.size ?? 0,
+    ...file,
+  };
+}
+
+describe("FilePane preview rendering", () => {
+  it("renders code/text previews with line numbers and highlighted token text", () => {
+    queryState.current = {
+      data: {
+        error: null,
+        file: makeFile({ content: "const answer = 42;\nconsole.log(answer);" }),
+      },
+      isFetching: false,
+    };
+
+    renderFilePane();
+
+    const text = container?.textContent ?? "";
+    expect(text).toContain("1");
+    expect(text).toContain("2");
+    expect(text).toContain("const answer = 42;");
+    expect(text).toContain("console.log(answer);");
+  });
+
+  it("keeps markdown files on the markdown preview path", () => {
+    queryState.current = {
+      data: {
+        error: null,
+        file: makeFile({ content: "# Guide", path: "README.md" }),
+      },
+      isFetching: false,
+    };
+
+    renderFilePane({ path: "README.md" });
+
+    expect(container?.querySelector('[data-testid="markdown-preview"]')?.textContent).toBe(
+      "# Guide",
+    );
+  });
+
+  it("renders image previews from the attachment preview URL", () => {
+    queryState.current = {
+      data: {
+        error: null,
+        file: makeFile({ content: undefined, encoding: "none", kind: "image", path: "logo.png" }),
+        imageAttachment: { id: "preview" },
+      },
+      isFetching: false,
+    };
+
+    renderFilePane({ path: "logo.png" });
+
+    expect(container?.querySelector("img")?.getAttribute("src")).toBe("blob:preview");
+  });
+
+  it("keeps binary previews on the unavailable state with file size", () => {
+    queryState.current = {
+      data: {
+        error: null,
+        file: makeFile({
+          content: undefined,
+          encoding: "none",
+          kind: "binary",
+          path: "tool",
+          size: 2048,
+        }),
+      },
+      isFetching: false,
+    };
+
+    renderFilePane({ path: "tool" });
+
+    expect(container?.textContent).toContain("Binary preview unavailable");
+    expect(container?.textContent).toContain("2.0 KB");
+  });
+
+  it("searches code/text previews case-insensitively and navigates matches", () => {
+    queryState.current = {
+      data: {
+        error: null,
+        file: makeFile({ content: "const answer = 42;\nconsole.log(ANSWER);" }),
+      },
+      isFetching: false,
+    };
+    renderFilePane();
+
+    act(() => {
+      handlePaneFindKeyboardAction({ id: "workspace.find.open", scope: "workspace" });
+    });
+    changeInput("answer");
+
+    expect(container?.textContent).toContain("1 / 2");
+    expect(HTMLElement.prototype.scrollIntoView).toHaveBeenCalledTimes(1);
+    expect(container?.querySelectorAll('span[style*="background-color"]').length).toBeGreaterThan(
+      0,
+    );
+
+    click("pane-find-next");
+    expect(container?.textContent).toContain("2 / 2");
+    expect(HTMLElement.prototype.scrollIntoView).toHaveBeenCalledTimes(2);
+
+    click("pane-find-prev");
+    expect(container?.textContent).toContain("1 / 2");
+    expect(HTMLElement.prototype.scrollIntoView).toHaveBeenCalledTimes(3);
+  });
+
+  it("clears file highlights on empty query and close", () => {
+    queryState.current = {
+      data: {
+        error: null,
+        file: makeFile({ content: "needle\nneedle" }),
+      },
+      isFetching: false,
+    };
+    renderFilePane();
+
+    act(() => {
+      handlePaneFindKeyboardAction({ id: "workspace.find.open", scope: "workspace" });
+    });
+    changeInput("needle");
+    expect(container?.textContent).toContain("1 / 2");
+
+    changeInput("");
+    expect(container?.textContent).toContain("0 / 0");
+    expect(container?.querySelectorAll('span[style*="background-color"]').length).toBe(0);
+
+    changeInput("needle");
+    click("pane-find-close");
+    expect(container?.querySelector('[data-testid="pane-find-input"]')).toBeNull();
+    expect(container?.querySelectorAll('span[style*="background-color"]').length).toBe(0);
+  });
+});

packages/app/src/components/file-pane.tsx

@@ -1,4 +1,4 @@
-import React, { useEffect, useMemo, useRef } from "react";
+import React, { useCallback, useEffect, useMemo, useRef, useState } from "react";
 import { useQuery } from "@tanstack/react-query";
 import type { FileReadResult } from "@getpaseo/client/internal/daemon-client";
 import Markdown, { MarkdownIt } from "react-native-markdown-display";
@@ -15,7 +15,7 @@ import { Fonts } from "@/constants/theme";
 import { useSessionStore, type ExplorerFile } from "@/stores/session-store";
 import { useWebScrollViewScrollbar } from "@/components/use-web-scrollbar";
 import { useWebScrollbarStyle } from "@/hooks/use-web-scrollbar-style";
-import { highlightCode, type HighlightToken } from "@getpaseo/highlight";
+import type { HighlightToken } from "@getpaseo/highlight";
 import { syntaxTokenStyleFor } from "@/styles/syntax-token-styles";
 import { inlineUnistylesStyle } from "@/styles/unistyles-inline-style";
 import { lineNumberGutterWidth } from "@/components/code-insets";
@@ -26,15 +26,33 @@ import type { AttachmentMetadata } from "@/attachments/types";
 import { useAttachmentPreviewUrl } from "@/attachments/use-attachment-preview-url";
 import { persistAttachmentFromBytes } from "@/attachments/service";
 import { createPreviewAttachmentId, getFileNameFromPath } from "@/attachments/utils";
+import {
+  createFilePaneFindTokenSegments,
+  createFilePaneLineFindHighlightMap,
+  createFilePaneTextRenderData,
+  findFilePaneTextMatches,
+  type FilePaneFindLineHighlight,
+  type FilePaneFindMatch,
+  type FilePaneFindTokenSegment,
+} from "@/components/file-pane-text-render-data";
 import { explorerFileFromReadResult } from "@/file-explorer/read-result";
 import { resolveFilePreviewReadTarget } from "@/file-explorer/preview-target";
 import type { WorkspaceFileLocation } from "@/workspace/file-open";
+import {
+  FindBar,
+  type PaneFindMatchState,
+  type UsePaneFindResult,
+  usePaneFind,
+} from "@/panels/pane-find";
 
 interface CodeLineProps {
-  tokens: HighlightToken[];
+  segments: FilePaneFindTokenSegment[];
   lineNumber: number;
   gutterWidth: number;
   highlighted: boolean;
+  matchBackgroundColor: string;
+  currentMatchBackgroundColor: string;
+  onLineRef?: (lineNumber: number, node: View | null) => void;
 }
 
 interface FilePreviewBodyProps {
@@ -46,6 +64,50 @@ interface FilePreviewBodyProps {
   imagePreviewUri: string | null;
 }
 
+interface FilePaneTextScrollRefs {
+  lineRefs: React.MutableRefObject<Map<number, View>>;
+  previewScrollRef: React.RefObject<RNScrollView | null>;
+  registerLineRef: (lineNumber: number, node: View | null) => void;
+}
+
+interface FilePaneCenterStateProps {
+  children: React.ReactNode;
+}
+
+interface FilePaneTextPreviewProps {
+  currentMatchBackgroundColor: string;
+  findHighlightsByLine: Map<number, FilePaneFindLineHighlight[]>;
+  gutterWidth: number;
+  isMarkdownFile: boolean;
+  isMobile: boolean;
+  lineSelection: FileLineSelection | null;
+  markdownParser: ReturnType<typeof MarkdownIt>;
+  markdownStyles: ReturnType<typeof createMarkdownStyles>;
+  matchBackgroundColor: string;
+  preview: ExplorerFile;
+  previewScrollRef: React.RefObject<RNScrollView | null>;
+  scrollbar: ReturnType<typeof useWebScrollViewScrollbar>;
+  showDesktopWebScrollbar: boolean;
+  textRenderData: ReturnType<typeof createFilePaneTextRenderData> | null;
+  textScrollRefs: FilePaneTextScrollRefs;
+  webScrollbarStyle: object;
+}
+
+interface FilePaneSearchableTextPreviewProps extends Omit<
+  FilePaneTextPreviewProps,
+  "findHighlightsByLine" | "textRenderData"
+> {
+  textRenderData: ReturnType<typeof createFilePaneTextRenderData>;
+}
+
+interface FilePaneImagePreviewProps {
+  imagePreviewUri: string | null;
+  imageSource: { uri: string } | null;
+  previewScrollRef: React.RefObject<RNScrollView | null>;
+  scrollbar: ReturnType<typeof useWebScrollViewScrollbar>;
+  showDesktopWebScrollbar: boolean;
+}
+
 function trimNonEmpty(value: string | null | undefined): string | null {
   if (typeof value !== "string") {
     return null;
@@ -117,11 +179,20 @@ function clampLineSelection(input: {
 }
 
 const CodeLine = React.memo(function CodeLine({
-  tokens,
+  segments,
   lineNumber,
   gutterWidth,
   highlighted,
+  matchBackgroundColor,
+  currentMatchBackgroundColor,
+  onLineRef,
 }: CodeLineProps) {
+  const setLineRef = useCallback(
+    (node: View | null) => {
+      onLineRef?.(lineNumber, node);
+    },
+    [lineNumber, onLineRef],
+  );
   const gutterStyle = useMemo(
     () => [codeLineStyles.gutter, inlineUnistylesStyle({ width: gutterWidth })],
     [gutterWidth],
@@ -131,19 +202,28 @@ const CodeLine = React.memo(function CodeLine({
     [highlighted],
   );
   const keyedTokens = useMemo(
-    () => tokens.map((token, index) => ({ key: `${index}-${token.text}`, token })),
-    [tokens],
+    () => segments.map((segment, index) => ({ key: `${index}-${segment.text}`, segment })),
+    [segments],
   );
   return (
-    <View style={lineStyle}>
+    <View ref={setLineRef} style={lineStyle}>
       <View style={gutterStyle}>
         <Text numberOfLines={1} style={codeLineStyles.gutterText}>
           {String(lineNumber)}
         </Text>
       </View>
       <Text selectable style={codeLineStyles.lineText}>
-        {keyedTokens.map(({ key, token }) => (
-          <CodeLineToken key={key} token={token} />
+        {keyedTokens.map(({ key, segment }) => (
+          <CodeLineToken
+            key={key}
+            backgroundColor={getFindSegmentBackgroundColor({
+              currentMatchBackgroundColor,
+              matchBackgroundColor,
+              segment,
+            })}
+            style={segment.style}
+            text={segment.text}
+          />
         ))}
       </Text>
     </View>
@@ -151,11 +231,237 @@ const CodeLine = React.memo(function CodeLine({
 });
 
 interface CodeLineTokenProps {
-  token: HighlightToken;
+  backgroundColor?: string;
+  style: HighlightToken["style"];
+  text: string;
 }
 
-function CodeLineToken({ token }: CodeLineTokenProps) {
-  return <Text style={syntaxTokenStyleFor(token.style)}>{token.text}</Text>;
+function CodeLineToken({ backgroundColor, style, text }: CodeLineTokenProps) {
+  const tokenStyle = useMemo(
+    () => [
+      style ? syntaxTokenStyleFor(style) : undefined,
+      backgroundColor ? { backgroundColor } : null,
+    ],
+    [backgroundColor, style],
+  );
+  return <Text style={tokenStyle}>{text}</Text>;
+}
+
+function getFindSegmentBackgroundColor(input: {
+  segment: FilePaneFindTokenSegment;
+  matchBackgroundColor: string;
+  currentMatchBackgroundColor: string;
+}) {
+  if (input.segment.isCurrentFindMatch) {
+    return input.currentMatchBackgroundColor;
+  }
+  if (input.segment.isFindMatch) {
+    return input.matchBackgroundColor;
+  }
+  return undefined;
+}
+
+function useFilePaneTextScrollRefs(lineNumbers: number[] | null): FilePaneTextScrollRefs {
+  const previewScrollRef = useRef<RNScrollView>(null);
+  const lineRefs = useRef(new Map<number, View>());
+
+  const registerLineRef = useCallback((lineNumber: number, node: View | null) => {
+    if (node) {
+      lineRefs.current.set(lineNumber, node);
+      return;
+    }
+    lineRefs.current.delete(lineNumber);
+  }, []);
+
+  useEffect(() => {
+    if (!lineNumbers) {
+      lineRefs.current.clear();
+      return;
+    }
+
+    const visibleLineNumbers = new Set(lineNumbers);
+    for (const lineNumber of lineRefs.current.keys()) {
+      if (!visibleLineNumbers.has(lineNumber)) {
+        lineRefs.current.delete(lineNumber);
+      }
+    }
+  }, [lineNumbers]);
+
+  return {
+    lineRefs,
+    previewScrollRef,
+    registerLineRef,
+  };
+}
+
+function createFilePaneMatchState(
+  query: string,
+  matches: FilePaneFindMatch[],
+  currentMatchIndex: number,
+): PaneFindMatchState {
+  if (query.length === 0) {
+    return { status: "empty" };
+  }
+  if (matches.length === 0) {
+    return { status: "no-match" };
+  }
+  return {
+    status: "matched",
+    current: Math.max(0, currentMatchIndex) + 1,
+    total: matches.length,
+  };
+}
+
+function scrollFilePaneLineIntoView(input: {
+  lineRefs: React.MutableRefObject<Map<number, View>>;
+  previewScrollRef: React.RefObject<RNScrollView | null>;
+  lineNumber: number;
+}) {
+  const lineNode = input.lineRefs.current.get(input.lineNumber);
+  const scrollNode = input.previewScrollRef.current;
+  if (!lineNode || !scrollNode) {
+    return;
+  }
+
+  if (isWeb && "scrollIntoView" in lineNode) {
+    (
+      lineNode as unknown as { scrollIntoView(options?: ScrollIntoViewOptions): void }
+    ).scrollIntoView({
+      block: "center",
+      inline: "nearest",
+    });
+    return;
+  }
+
+  const measurableLineNode = lineNode as View & {
+    measureLayout?: (
+      relativeToNativeNode: unknown,
+      onSuccess: (x: number, y: number) => void,
+      onFail?: () => void,
+    ) => void;
+  };
+  measurableLineNode.measureLayout?.(scrollNode, (_x, y) => {
+    scrollNode.scrollTo({ y: Math.max(0, y - 48), animated: true });
+  });
+}
+
+function scrollFilePaneLineIntoViewSoon(input: {
+  lineRefs: React.MutableRefObject<Map<number, View>>;
+  previewScrollRef: React.RefObject<RNScrollView | null>;
+  lineNumber: number;
+}) {
+  const schedule =
+    globalThis.requestAnimationFrame ??
+    ((callback: FrameRequestCallback) => {
+      setTimeout(() => callback(Date.now()), 0);
+      return 0;
+    });
+  schedule(() => {
+    scrollFilePaneLineIntoView(input);
+  });
+}
+
+interface FilePaneFindState {
+  query: string;
+  matches: FilePaneFindMatch[];
+  currentMatchIndex: number;
+}
+
+const EMPTY_FILE_PANE_FIND_STATE: FilePaneFindState = {
+  query: "",
+  matches: [],
+  currentMatchIndex: 0,
+};
+
+function useFilePaneFindAdapter(input: {
+  textRenderData: ReturnType<typeof createFilePaneTextRenderData> | null;
+  textScrollRefs: FilePaneTextScrollRefs;
+}) {
+  const [findState, setFindState] = useState<FilePaneFindState>(EMPTY_FILE_PANE_FIND_STATE);
+  const findQuery = findState.query;
+  const findMatches = findState.matches;
+  const currentMatchIndex = findState.currentMatchIndex;
+  const findHighlightsByLine = useMemo(
+    () => createFilePaneLineFindHighlightMap(findMatches, currentMatchIndex),
+    [currentMatchIndex, findMatches],
+  );
+  const findMatchState = useMemo(
+    () => createFilePaneMatchState(findQuery, findMatches, currentMatchIndex),
+    [currentMatchIndex, findMatches, findQuery],
+  );
+  const scrollMatchIntoView = useCallback(
+    (matches: FilePaneFindMatch[], matchIndex: number) => {
+      const lineNumber = matches[matchIndex]?.lineSpans[0]?.lineNumber;
+      if (!lineNumber) {
+        return;
+      }
+      scrollFilePaneLineIntoViewSoon({
+        lineRefs: input.textScrollRefs.lineRefs,
+        lineNumber,
+        previewScrollRef: input.textScrollRefs.previewScrollRef,
+      });
+    },
+    [input.textScrollRefs.lineRefs, input.textScrollRefs.previewScrollRef],
+  );
+  const paneFind = usePaneFind({
+    matchState: findMatchState,
+    onQuery: (query) => {
+      const nextMatches = input.textRenderData
+        ? findFilePaneTextMatches(input.textRenderData, query)
+        : [];
+      setFindState({ query, matches: nextMatches, currentMatchIndex: 0 });
+      scrollMatchIntoView(nextMatches, 0);
+      return createFilePaneMatchState(query, nextMatches, 0);
+    },
+    onNext: () => {
+      if (findMatches.length === 0) {
+        return createFilePaneMatchState(findQuery, findMatches, currentMatchIndex);
+      }
+      const nextIndex = (currentMatchIndex + 1) % findMatches.length;
+      setFindState((current) => ({ ...current, currentMatchIndex: nextIndex }));
+      scrollMatchIntoView(findMatches, nextIndex);
+      return createFilePaneMatchState(findQuery, findMatches, nextIndex);
+    },
+    onPrev: () => {
+      if (findMatches.length === 0) {
+        return createFilePaneMatchState(findQuery, findMatches, currentMatchIndex);
+      }
+      const nextIndex = (currentMatchIndex - 1 + findMatches.length) % findMatches.length;
+      setFindState((current) => ({ ...current, currentMatchIndex: nextIndex }));
+      scrollMatchIntoView(findMatches, nextIndex);
+      return createFilePaneMatchState(findQuery, findMatches, nextIndex);
+    },
+    onClose: () => {
+      setFindState(EMPTY_FILE_PANE_FIND_STATE);
+    },
+  });
+
+  useEffect(() => {
+    setFindState((current) => {
+      if (!input.textRenderData || current.query.length === 0) {
+        return current.query.length === 0 &&
+          current.matches.length === 0 &&
+          current.currentMatchIndex === 0
+          ? current
+          : EMPTY_FILE_PANE_FIND_STATE;
+      }
+
+      const nextMatches = findFilePaneTextMatches(input.textRenderData, current.query);
+      const nextMatchIndex =
+        nextMatches.length === 0 ? 0 : Math.min(current.currentMatchIndex, nextMatches.length - 1);
+
+      return {
+        query: current.query,
+        matches: nextMatches,
+        currentMatchIndex: nextMatchIndex,
+      };
+    });
+  }, [input.textRenderData]);
+
+  return {
+    findHighlightsByLine,
+    paneFind,
+  };
 }
 
 const codeLineStyles = StyleSheet.create((theme) => ({
@@ -186,6 +492,175 @@ const codeLineStyles = StyleSheet.create((theme) => ({
   },
 }));
 
+function FilePaneFindBarSlot({ paneFind }: { paneFind: UsePaneFindResult }) {
+  return paneFind.isOpen ? <FindBar {...paneFind.findBarProps} /> : null;
+}
+
+function FilePaneCenterState({ children }: FilePaneCenterStateProps) {
+  return <View style={styles.centerState}>{children}</View>;
+}
+
+function isLineSelected(lineSelection: FileLineSelection | null, lineNumber: number): boolean {
+  if (!lineSelection) {
+    return false;
+  }
+  return lineNumber >= lineSelection.lineStart && lineNumber <= lineSelection.lineEnd;
+}
+
+function FilePaneTextPreview({
+  currentMatchBackgroundColor,
+  findHighlightsByLine,
+  gutterWidth,
+  isMarkdownFile,
+  isMobile,
+  lineSelection,
+  markdownParser,
+  markdownStyles,
+  matchBackgroundColor,
+  preview,
+  previewScrollRef,
+  scrollbar,
+  showDesktopWebScrollbar,
+  textRenderData,
+  textScrollRefs,
+  webScrollbarStyle,
+}: FilePaneTextPreviewProps) {
+  if (isMarkdownFile) {
+    return (
+      <>
+        <RNScrollView
+          ref={previewScrollRef}
+          style={styles.previewContent}
+          contentContainerStyle={styles.previewMarkdownScrollContent}
+          onLayout={scrollbar.onLayout}
+          onScroll={scrollbar.onScroll}
+          onContentSizeChange={scrollbar.onContentSizeChange}
+          scrollEventThrottle={16}
+          showsVerticalScrollIndicator={!showDesktopWebScrollbar}
+        >
+          <Markdown style={markdownStyles} markdownit={markdownParser}>
+            {preview.content ?? ""}
+          </Markdown>
+        </RNScrollView>
+        {scrollbar.overlay}
+      </>
+    );
+  }
+
+  const lines = textRenderData?.lines ?? [
+    {
+      lineNumber: 1,
+      text: preview.content ?? "",
+      tokens: [{ text: preview.content ?? "", style: null }],
+    },
+  ];
+  const keyedLines = lines.map((line) => ({
+    key: `line-${line.lineNumber}`,
+    line,
+  }));
+  const codeLines = (
+    <View>
+      {keyedLines.map(({ key, line }) => (
+        <CodeLine
+          key={key}
+          segments={createFilePaneFindTokenSegments(
+            line,
+            findHighlightsByLine.get(line.lineNumber) ?? [],
+          )}
+          lineNumber={line.lineNumber}
+          gutterWidth={gutterWidth}
+          highlighted={isLineSelected(lineSelection, line.lineNumber)}
+          matchBackgroundColor={matchBackgroundColor}
+          currentMatchBackgroundColor={currentMatchBackgroundColor}
+          onLineRef={textScrollRefs.registerLineRef}
+        />
+      ))}
+    </View>
+  );
+
+  return (
+    <>
+      <RNScrollView
+        ref={previewScrollRef}
+        style={styles.previewContent}
+        onLayout={scrollbar.onLayout}
+        onScroll={scrollbar.onScroll}
+        onContentSizeChange={scrollbar.onContentSizeChange}
+        scrollEventThrottle={16}
+        showsVerticalScrollIndicator={!showDesktopWebScrollbar}
+      >
+        {isMobile ? (
+          <View style={styles.previewCodeScrollContent}>{codeLines}</View>
+        ) : (
+          <RNScrollView
+            horizontal
+            nestedScrollEnabled
+            showsHorizontalScrollIndicator
+            style={webScrollbarStyle}
+            contentContainerStyle={styles.previewCodeScrollContent}
+          >
+            {codeLines}
+          </RNScrollView>
+        )}
+      </RNScrollView>
+      {scrollbar.overlay}
+    </>
+  );
+}
+
+function FilePaneSearchableTextPreview(props: FilePaneSearchableTextPreviewProps) {
+  const { findHighlightsByLine, paneFind } = useFilePaneFindAdapter({
+    textRenderData: props.textRenderData,
+    textScrollRefs: props.textScrollRefs,
+  });
+
+  return (
+    <>
+      <FilePaneFindBarSlot paneFind={paneFind} />
+      <FilePaneTextPreview {...props} findHighlightsByLine={findHighlightsByLine} />
+    </>
+  );
+}
+
+function FilePaneImagePreview({
+  imagePreviewUri,
+  imageSource,
+  previewScrollRef,
+  scrollbar,
+  showDesktopWebScrollbar,
+}: FilePaneImagePreviewProps) {
+  if (!imagePreviewUri) {
+    return (
+      <FilePaneCenterState>
+        <ActivityIndicator size="small" />
+        <Text style={styles.loadingText}>Loading file…</Text>
+      </FilePaneCenterState>
+    );
+  }
+
+  return (
+    <>
+      <RNScrollView
+        ref={previewScrollRef}
+        style={styles.previewContent}
+        contentContainerStyle={styles.previewImageScrollContent}
+        onLayout={scrollbar.onLayout}
+        onScroll={scrollbar.onScroll}
+        onContentSizeChange={scrollbar.onContentSizeChange}
+        scrollEventThrottle={16}
+        showsVerticalScrollIndicator={!showDesktopWebScrollbar}
+      >
+        <RNImage
+          source={imageSource ?? undefined}
+          style={styles.previewImage}
+          resizeMode="contain"
+        />
+      </RNScrollView>
+      {scrollbar.overlay}
+    </>
+  );
+}
+
 function FilePreviewBody({
   preview,
   isLoading,
@@ -196,40 +671,50 @@ function FilePreviewBody({
 }: FilePreviewBodyProps) {
   const { theme } = useUnistyles();
   const filePath = location.path;
+  const isDark = theme.colorScheme === "dark";
+  const matchBackgroundColor = isDark ? "rgba(250, 204, 21, 0.32)" : "rgba(250, 204, 21, 0.38)";
+  const currentMatchBackgroundColor = isDark
+    ? "rgba(251, 146, 60, 0.58)"
+    : "rgba(251, 146, 60, 0.48)";
   const markdownStyles = useMemo(() => createMarkdownStyles(theme), [theme]);
   const markdownParser = useMemo(() => MarkdownIt({ typographer: true, linkify: true }), []);
   const isMarkdownFile =
     preview?.kind === "text" && isRenderedMarkdownFile(filePath) && !location.lineStart;
 
-  const previewScrollRef = useRef<RNScrollView>(null);
+  const fallbackScrollRef = useRef<RNScrollView>(null);
   const webScrollbarStyle = useWebScrollbarStyle();
-  const scrollbar = useWebScrollViewScrollbar(previewScrollRef, {
-    enabled: showDesktopWebScrollbar,
-  });
 
-  const highlightedLines = useMemo(() => {
+  const textRenderData = useMemo(() => {
     if (!preview || preview.kind !== "text" || isMarkdownFile) {
       return null;
     }
 
-    return highlightCode(preview.content ?? "", filePath);
+    return createFilePaneTextRenderData(preview.content ?? "", filePath);
   }, [isMarkdownFile, preview, filePath]);
-
+  const textLineNumbers = useMemo(
+    () => textRenderData?.lines.map((line) => line.lineNumber) ?? null,
+    [textRenderData],
+  );
+  const textScrollRefs = useFilePaneTextScrollRefs(textLineNumbers);
+  const previewScrollRef = textRenderData ? textScrollRefs.previewScrollRef : fallbackScrollRef;
+  const scrollbar = useWebScrollViewScrollbar(previewScrollRef, {
+    enabled: showDesktopWebScrollbar,
+  });
   const gutterWidth = useMemo(() => {
-    if (!highlightedLines) return 0;
-    return lineNumberGutterWidth(highlightedLines.length, theme.fontSize.code);
-  }, [highlightedLines, theme.fontSize.code]);
+    if (!textRenderData) return 0;
+    return lineNumberGutterWidth(textRenderData.lines.length, theme.fontSize.code);
+  }, [textRenderData, theme.fontSize.code]);
   const lineHeight = theme.fontSize.code * 1.45;
   const lineSelection = useMemo(() => {
-    if (!highlightedLines) {
+    if (!textRenderData) {
       return null;
     }
     return clampLineSelection({
       lineStart: location.lineStart,
       lineEnd: location.lineEnd,
-      lineCount: highlightedLines.length,
+      lineCount: textRenderData.lines.length,
     });
-  }, [highlightedLines, location.lineEnd, location.lineStart]);
+  }, [textRenderData, location.lineEnd, location.lineStart]);
 
   const imageSource = useMemo(
     () => (imagePreviewUri ? { uri: imagePreviewUri } : null),
@@ -247,141 +732,83 @@ function FilePreviewBody({
       });
     }, 0);
     return () => clearTimeout(timeout);
-  }, [lineHeight, lineSelection]);
+  }, [lineHeight, lineSelection, previewScrollRef]);
 
+  let content: React.ReactNode;
   if (isLoading && !preview) {
-    return (
-      <View style={styles.centerState}>
+    content = (
+      <FilePaneCenterState>
         <ActivityIndicator size="small" />
         <Text style={styles.loadingText}>Loading file…</Text>
-      </View>
+      </FilePaneCenterState>
     );
-  }
-
-  if (!preview) {
-    return (
-      <View style={styles.centerState}>
+  } else if (!preview) {
+    content = (
+      <FilePaneCenterState>
         <Text style={styles.emptyText}>No preview available</Text>
-      </View>
+      </FilePaneCenterState>
+    );
+  } else if (preview.kind === "text" && textRenderData) {
+    content = (
+      <FilePaneSearchableTextPreview
+        currentMatchBackgroundColor={currentMatchBackgroundColor}
+        gutterWidth={gutterWidth}
+        isMarkdownFile={isMarkdownFile}
+        isMobile={isMobile}
+        lineSelection={lineSelection}
+        markdownParser={markdownParser}
+        markdownStyles={markdownStyles}
+        matchBackgroundColor={matchBackgroundColor}
+        preview={preview}
+        previewScrollRef={previewScrollRef}
+        scrollbar={scrollbar}
+        showDesktopWebScrollbar={showDesktopWebScrollbar}
+        textRenderData={textRenderData}
+        textScrollRefs={textScrollRefs}
+        webScrollbarStyle={webScrollbarStyle}
+      />
+    );
+  } else if (preview.kind === "text") {
+    content = (
+      <FilePaneTextPreview
+        currentMatchBackgroundColor={currentMatchBackgroundColor}
+        findHighlightsByLine={new Map()}
+        gutterWidth={gutterWidth}
+        isMarkdownFile={isMarkdownFile}
+        isMobile={isMobile}
+        lineSelection={lineSelection}
+        markdownParser={markdownParser}
+        markdownStyles={markdownStyles}
+        matchBackgroundColor={matchBackgroundColor}
+        preview={preview}
+        previewScrollRef={previewScrollRef}
+        scrollbar={scrollbar}
+        showDesktopWebScrollbar={showDesktopWebScrollbar}
+        textRenderData={textRenderData}
+        textScrollRefs={textScrollRefs}
+        webScrollbarStyle={webScrollbarStyle}
+      />
+    );
+  } else if (preview.kind === "image") {
+    content = (
+      <FilePaneImagePreview
+        imagePreviewUri={imagePreviewUri}
+        imageSource={imageSource}
+        previewScrollRef={previewScrollRef}
+        scrollbar={scrollbar}
+        showDesktopWebScrollbar={showDesktopWebScrollbar}
+      />
+    );
+  } else {
+    content = (
+      <FilePaneCenterState>
+        <Text style={styles.emptyText}>Binary preview unavailable</Text>
+        <Text style={styles.binaryMetaText}>{formatFileSize({ size: preview.size })}</Text>
+      </FilePaneCenterState>
     );
   }
 
-  if (preview.kind === "text") {
-    if (isMarkdownFile) {
-      return (
-        <View style={styles.previewScrollContainer}>
-          <RNScrollView
-            ref={previewScrollRef}
-            style={styles.previewContent}
-            contentContainerStyle={styles.previewMarkdownScrollContent}
-            onLayout={scrollbar.onLayout}
-            onScroll={scrollbar.onScroll}
-            onContentSizeChange={scrollbar.onContentSizeChange}
-            scrollEventThrottle={16}
-            showsVerticalScrollIndicator={!showDesktopWebScrollbar}
-          >
-            <Markdown style={markdownStyles} markdownit={markdownParser}>
-              {preview.content ?? ""}
-            </Markdown>
-          </RNScrollView>
-          {scrollbar.overlay}
-        </View>
-      );
-    }
-
-    const lines = highlightedLines ?? [[{ text: preview.content ?? "", style: null }]];
-    const keyedLines = lines.map((tokens, index) => ({
-      key: `line-${index}`,
-      tokens,
-      lineNumber: index + 1,
-    }));
-    const codeLines = (
-      <View>
-        {keyedLines.map(({ key, tokens, lineNumber }) => (
-          <CodeLine
-            key={key}
-            tokens={tokens}
-            lineNumber={lineNumber}
-            gutterWidth={gutterWidth}
-            highlighted={
-              Boolean(lineSelection) &&
-              lineNumber >= (lineSelection?.lineStart ?? 0) &&
-              lineNumber <= (lineSelection?.lineEnd ?? 0)
-            }
-          />
-        ))}
-      </View>
-    );
-
-    return (
-      <View style={styles.previewScrollContainer}>
-        <RNScrollView
-          ref={previewScrollRef}
-          style={styles.previewContent}
-          onLayout={scrollbar.onLayout}
-          onScroll={scrollbar.onScroll}
-          onContentSizeChange={scrollbar.onContentSizeChange}
-          scrollEventThrottle={16}
-          showsVerticalScrollIndicator={!showDesktopWebScrollbar}
-        >
-          {isMobile ? (
-            <View style={styles.previewCodeScrollContent}>{codeLines}</View>
-          ) : (
-            <RNScrollView
-              horizontal
-              nestedScrollEnabled
-              showsHorizontalScrollIndicator
-              style={webScrollbarStyle}
-              contentContainerStyle={styles.previewCodeScrollContent}
-            >
-              {codeLines}
-            </RNScrollView>
-          )}
-        </RNScrollView>
-        {scrollbar.overlay}
-      </View>
-    );
-  }
-
-  if (preview.kind === "image") {
-    if (!imagePreviewUri) {
-      return (
-        <View style={styles.centerState}>
-          <ActivityIndicator size="small" />
-          <Text style={styles.loadingText}>Loading file…</Text>
-        </View>
-      );
-    }
-
-    return (
-      <View style={styles.previewScrollContainer}>
-        <RNScrollView
-          ref={previewScrollRef}
-          style={styles.previewContent}
-          contentContainerStyle={styles.previewImageScrollContent}
-          onLayout={scrollbar.onLayout}
-          onScroll={scrollbar.onScroll}
-          onContentSizeChange={scrollbar.onContentSizeChange}
-          scrollEventThrottle={16}
-          showsVerticalScrollIndicator={!showDesktopWebScrollbar}
-        >
-          <RNImage
-            source={imageSource ?? undefined}
-            style={styles.previewImage}
-            resizeMode="contain"
-          />
-        </RNScrollView>
-        {scrollbar.overlay}
-      </View>
-    );
-  }
-
-  return (
-    <View style={styles.centerState}>
-      <Text style={styles.emptyText}>Binary preview unavailable</Text>
-      <Text style={styles.binaryMetaText}>{formatFileSize({ size: preview.size })}</Text>
-    </View>
-  );
+  return <View style={styles.previewScrollContainer}>{content}</View>;
 }
 
 export function FilePane({

packages/app/src/components/message.tsx

@@ -124,6 +124,7 @@ interface UserMessageProps {
   isFirstInGroup?: boolean;
   isLastInGroup?: boolean;
   disableOuterSpacing?: boolean;
+  findHighlights?: MessageFindHighlight[];
 }
 
 const MessageOuterSpacingContext = createContext(false);
@@ -158,6 +159,19 @@ const MARKDOWN_ALLOWED_IMAGE_HANDLERS = [
 ] as const;
 const MARKDOWN_TOP_LEVEL_MAX_EXCEEDED_ITEM = <Text key="dotdotdot">...</Text>;
 
+export interface MessageFindHighlight {
+  id: string;
+  start: number;
+  end: number;
+  isCurrent: boolean;
+}
+
+interface MessageFindTextSegment {
+  key: string;
+  text: string;
+  highlight?: MessageFindHighlight;
+}
+
 interface MarkdownWithStableRendererProps {
   children: ReactNode;
   style: ReturnType<typeof createMarkdownStyles>;
@@ -209,6 +223,95 @@ const SCROLL_EDGE_EPSILON = 0.5;
 export const STREAM_METADATA_FONT_SIZE = 13;
 type ScrollAxis = "x" | "y";
 
+function normalizeFindHighlights(
+  textLength: number,
+  highlights: MessageFindHighlight[] | undefined,
+): MessageFindHighlight[] {
+  if (!highlights || highlights.length === 0) {
+    return [];
+  }
+
+  return highlights
+    .map((highlight) => ({
+      ...highlight,
+      start: Math.max(0, Math.min(textLength, highlight.start)),
+      end: Math.max(0, Math.min(textLength, highlight.end)),
+    }))
+    .filter((highlight) => highlight.start < highlight.end)
+    .sort((left, right) => left.start - right.start || left.end - right.end);
+}
+
+function createMessageFindTextSegments(
+  text: string,
+  highlights: MessageFindHighlight[] | undefined,
+): MessageFindTextSegment[] {
+  const normalizedHighlights = normalizeFindHighlights(text.length, highlights);
+  if (normalizedHighlights.length === 0) {
+    return [{ key: "text", text }];
+  }
+
+  const segments: MessageFindTextSegment[] = [];
+  let cursor = 0;
+  for (const highlight of normalizedHighlights) {
+    if (cursor < highlight.start) {
+      segments.push({
+        key: `plain:${cursor}:${highlight.start}`,
+        text: text.slice(cursor, highlight.start),
+      });
+    }
+    segments.push({
+      key: highlight.id,
+      text: text.slice(highlight.start, highlight.end),
+      highlight,
+    });
+    cursor = highlight.end;
+  }
+
+  if (cursor < text.length) {
+    segments.push({
+      key: `plain:${cursor}:${text.length}`,
+      text: text.slice(cursor),
+    });
+  }
+
+  return segments;
+}
+
+interface MarkdownBlockWithOffset {
+  key: string;
+  block: string;
+  startOffset: number;
+}
+
+function createMarkdownBlocksWithOffsets(message: string): MarkdownBlockWithOffset[] {
+  let cursor = 0;
+  return splitMarkdownBlocks(message).map((block, index) => {
+    const startOffset = Math.max(cursor, message.indexOf(block, cursor));
+    cursor = startOffset + block.length;
+    return {
+      key: `${index}:${block.slice(0, 32)}`,
+      block,
+      startOffset,
+    };
+  });
+}
+
+function createBlockFindHighlights(
+  blockStartOffset: number,
+  blockLength: number,
+  highlights: MessageFindHighlight[] | undefined,
+): MessageFindHighlight[] {
+  const blockEndOffset = blockStartOffset + blockLength;
+  return normalizeFindHighlights(blockEndOffset, highlights)
+    .filter((highlight) => highlight.start < blockEndOffset && highlight.end > blockStartOffset)
+    .map((highlight) => ({
+      id: highlight.id,
+      start: Math.max(0, highlight.start - blockStartOffset),
+      end: Math.min(blockLength, highlight.end - blockStartOffset),
+      isCurrent: highlight.isCurrent,
+    }));
+}
+
 function ensureWebToolCallShimmerKeyframes() {
   if (isNative) {
     return;
@@ -369,6 +472,14 @@ const userMessageStylesheet = StyleSheet.create((theme) => ({
     lineHeight: 22,
     overflowWrap: "anywhere",
   },
+  findMatchText: {
+    backgroundColor:
+      theme.colorScheme === "dark" ? "rgba(250, 204, 21, 0.32)" : "rgba(250, 204, 21, 0.38)",
+  },
+  findCurrentMatchText: {
+    backgroundColor:
+      theme.colorScheme === "dark" ? "rgba(251, 146, 60, 0.58)" : "rgba(251, 146, 60, 0.48)",
+  },
   imagePreviewContainer: {
     flexDirection: "row",
     gap: theme.spacing[2],
@@ -436,6 +547,28 @@ const userMessageStylesheet = StyleSheet.create((theme) => ({
   },
 }));
 
+function MessageFindHighlightedText({ segments }: { segments: MessageFindTextSegment[] }) {
+  return (
+    <>
+      {segments.map((segment) => (
+        <Text key={segment.key} style={getMessageFindHighlightStyle(segment.highlight)}>
+          {segment.text}
+        </Text>
+      ))}
+    </>
+  );
+}
+
+function getMessageFindHighlightStyle(highlight: MessageFindHighlight | undefined) {
+  if (highlight?.isCurrent) {
+    return userMessageStylesheet.findCurrentMatchText;
+  }
+  if (highlight) {
+    return userMessageStylesheet.findMatchText;
+  }
+  return undefined;
+}
+
 function UserMessageAttachmentThumbnail({ image }: { image: UserMessageImageAttachment }) {
   const uri = useAttachmentPreviewUrl(image);
   const imageSource = useMemo(() => ({ uri: uri ?? "" }), [uri]);
@@ -475,6 +608,7 @@ export const UserMessage = memo(function UserMessage({
   isFirstInGroup = true,
   isLastInGroup = true,
   disableOuterSpacing,
+  findHighlights,
 }: UserMessageProps) {
   const isCompact = useIsCompactFormFactor();
   const [isHovered, setIsHovered] = useState(false);
@@ -498,6 +632,10 @@ export const UserMessage = memo(function UserMessage({
     },
     [rewindMutation],
   );
+  const highlightedMessageSegments = useMemo(
+    () => createMessageFindTextSegments(message, findHighlights),
+    [findHighlights, message],
+  );
 
   const containerStyle = useMemo(
     () => [
@@ -567,7 +705,7 @@ export const UserMessage = memo(function UserMessage({
           ) : null}
           {hasText ? (
             <Text selectable style={userMessageStylesheet.text}>
-              {message}
+              <MessageFindHighlightedText segments={highlightedMessageSegments} />
             </Text>
           ) : null}
         </View>
@@ -752,6 +890,7 @@ interface AssistantMessageProps {
   serverId?: string;
   client?: DaemonClient | null;
   spacing?: "default" | "compactTop" | "compactBottom" | "compactBoth";
+  findHighlights?: MessageFindHighlight[];
 }
 
 export const assistantMessageStylesheet = StyleSheet.create((theme) => ({
@@ -1487,6 +1626,7 @@ interface MemoizedMarkdownBlockProps {
   rules: RenderRules;
   parser: MarkdownIt;
   onLinkPress: (url: string) => boolean;
+  findHighlights?: MessageFindHighlight[];
 }
 
 const MemoizedMarkdownBlock = React.memo(function MemoizedMarkdownBlock({
@@ -1494,26 +1634,61 @@ const MemoizedMarkdownBlock = React.memo(function MemoizedMarkdownBlock({
   rules,
   parser,
   onLinkPress,
+  findHighlights,
 }: MemoizedMarkdownBlockProps) {
+  const textCursorRef = useRef(0);
+  textCursorRef.current = 0;
+  const renderFindHighlightedText = useCallback(
+    (content: string) => {
+      if (!findHighlights || findHighlights.length === 0 || content.length === 0) {
+        return content;
+      }
+
+      const start = text.indexOf(content, textCursorRef.current);
+      if (start < 0) {
+        return content;
+      }
+
+      textCursorRef.current = start + content.length;
+      const end = start + content.length;
+      const contentHighlights = findHighlights
+        .filter((highlight) => highlight.start < end && highlight.end > start)
+        .map((highlight) => ({
+          id: highlight.id,
+          start: Math.max(0, highlight.start - start),
+          end: Math.min(content.length, highlight.end - start),
+          isCurrent: highlight.isCurrent,
+        }));
+      const segments = createMessageFindTextSegments(content, contentHighlights);
+      return <MessageFindHighlightedText segments={segments} />;
+    },
+    [findHighlights, text],
+  );
+
   return (
-    <ThemedMarkdown
-      uniProps={markdownStyleMapping}
-      rules={rules}
-      markdownit={parser}
-      onLinkPress={onLinkPress}
-      allowedImageHandlers={MARKDOWN_ALLOWED_IMAGE_HANDLERS}
-      topLevelMaxExceededItem={MARKDOWN_TOP_LEVEL_MAX_EXCEEDED_ITEM}
-    >
-      {text}
-    </ThemedMarkdown>
+    <MarkdownFindHighlightContext.Provider value={renderFindHighlightedText}>
+      <ThemedMarkdown
+        uniProps={markdownStyleMapping}
+        rules={rules}
+        markdownit={parser}
+        onLinkPress={onLinkPress}
+        allowedImageHandlers={MARKDOWN_ALLOWED_IMAGE_HANDLERS}
+        topLevelMaxExceededItem={MARKDOWN_TOP_LEVEL_MAX_EXCEEDED_ITEM}
+      >
+        {text}
+      </ThemedMarkdown>
+    </MarkdownFindHighlightContext.Provider>
   );
 });
 
+const MarkdownFindHighlightContext = createContext<((content: string) => ReactNode) | null>(null);
+
 interface MarkdownInheritedTextProps {
   inheritedStyles: TextStyle;
   textStyle: TextStyle;
   style?: StyleProp<TextStyle>;
   children: ReactNode;
+  disableFindHighlight?: boolean;
 }
 
 function MarkdownInheritedText({
@@ -1521,12 +1696,18 @@ function MarkdownInheritedText({
   textStyle,
   style: overrideStyle,
   children,
+  disableFindHighlight = false,
 }: MarkdownInheritedTextProps) {
+  const renderFindHighlightedText = useContext(MarkdownFindHighlightContext);
   const style = useMemo(
     () => [inheritedStyles, textStyle, overrideStyle],
     [inheritedStyles, textStyle, overrideStyle],
   );
-  return <MarkdownTextSpan style={style}>{children}</MarkdownTextSpan>;
+  const renderedChildren =
+    !disableFindHighlight && typeof children === "string" && renderFindHighlightedText
+      ? renderFindHighlightedText(children)
+      : children;
+  return <MarkdownTextSpan style={style}>{renderedChildren}</MarkdownTextSpan>;
 }
 
 interface MarkdownListItemContentProps {
@@ -1559,6 +1740,7 @@ export const AssistantMessage = memo(function AssistantMessage({
   serverId,
   client,
   spacing = "default",
+  findHighlights,
 }: AssistantMessageProps) {
   const markdownParser = useMemo(() => {
     const parser = MarkdownIt({ typographer: true, linkify: true });
@@ -1696,6 +1878,7 @@ export const AssistantMessage = memo(function AssistantMessage({
             key={node.key}
             inheritedStyles={inheritedStyles}
             textStyle={styles.code_inline}
+            disableFindHighlight
           >
             {content}
           </MarkdownInheritedText>
@@ -1803,11 +1986,7 @@ export const AssistantMessage = memo(function AssistantMessage({
     };
   }, [client, fileLinkActions, markdownParser, serverId, workspaceRoot]);
 
-  const blocks = useMemo(() => splitMarkdownBlocks(message), [message]);
-  const keyedBlocks = useMemo(
-    () => blocks.map((block, index) => ({ key: `${index}:${block.slice(0, 32)}`, block })),
-    [blocks],
-  );
+  const keyedBlocks = useMemo(() => createMarkdownBlocksWithOffsets(message), [message]);
 
   const assistantContainerStyle = useMemo(
     () => [
@@ -1822,7 +2001,7 @@ export const AssistantMessage = memo(function AssistantMessage({
 
   return (
     <View testID="assistant-message" style={assistantContainerStyle}>
-      {keyedBlocks.map(({ key, block }, index) => (
+      {keyedBlocks.map(({ key, block, startOffset }, index) => (
         <AssistantMessageBlockContainer
           key={key}
           block={block}
@@ -1833,6 +2012,7 @@ export const AssistantMessage = memo(function AssistantMessage({
             rules={markdownRules}
             parser={markdownParser}
             onLinkPress={handleMarkdownLinkPress}
+            findHighlights={createBlockFindHighlights(startOffset, block.length, findHighlights)}
           />
         </AssistantMessageBlockContainer>
       ))}

packages/app/src/components/stream-strategy-native.test.ts

@@ -0,0 +1,28 @@
+import { describe, expect, it } from "vitest";
+import { getNativeScrollToIndexFallbackOffset } from "@/agent-stream/strategy-native";
+
+describe("getNativeScrollToIndexFallbackOffset", () => {
+  it("approximates the offset for an unmeasured native FlatList row", () => {
+    expect(
+      getNativeScrollToIndexFallbackOffset({
+        index: 25,
+        averageItemLength: 72,
+      }),
+    ).toBe(1800);
+  });
+
+  it("falls back to the start when the average item length is not useful", () => {
+    expect(
+      getNativeScrollToIndexFallbackOffset({
+        index: 25,
+        averageItemLength: 0,
+      }),
+    ).toBe(0);
+    expect(
+      getNativeScrollToIndexFallbackOffset({
+        index: 25,
+        averageItemLength: Number.NaN,
+      }),
+    ).toBe(0);
+  });
+});

packages/app/src/components/terminal-emulator.tsx

@@ -22,6 +22,7 @@ import type { TerminalInputModeState } from "@getpaseo/protocol/terminal-input-m
 import type { PendingTerminalModifiers } from "../utils/terminal-keys";
 import {
   TerminalEmulatorRuntime,
+  type TerminalFindResultChangeEvent,
   type TerminalOutputData,
 } from "../terminal/runtime/terminal-emulator-runtime";
 import type {
@@ -49,6 +50,10 @@ export interface TerminalEmulatorHandle {
   renderSnapshot: (state: TerminalState | null) => void;
   clear: () => void;
   blur: () => void;
+  findNext: (input: { query: string }) => boolean;
+  findPrevious: (input: { query: string }) => boolean;
+  clearFindDecorations: () => void;
+  onFindResultsChanged: (listener: (event: TerminalFindResultChangeEvent) => void) => () => void;
 }
 
 const SCROLLBAR_HANDLE_WIDTH_IDLE = 6;
@@ -328,6 +333,18 @@ export default function TerminalEmulator({
       blur: () => {
         runtimeRef.current?.blur();
       },
+      findNext: (input: { query: string }) => {
+        return runtimeRef.current?.findNext(input) ?? false;
+      },
+      findPrevious: (input: { query: string }) => {
+        return runtimeRef.current?.findPrevious(input) ?? false;
+      },
+      clearFindDecorations: () => {
+        runtimeRef.current?.clearFindDecorations();
+      },
+      onFindResultsChanged: (listener: (event: TerminalFindResultChangeEvent) => void) => {
+        return runtimeRef.current?.onFindResultsChanged(listener) ?? (() => {});
+      },
     }),
     [],
   );

packages/app/src/components/terminal-pane.test.tsx

@@ -0,0 +1,452 @@
+/**
+ * @vitest-environment jsdom
+ */
+import React, { act, useImperativeHandle } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+import { TerminalPane } from "@/components/terminal-pane";
+import type { TerminalEmulatorHandle } from "@/components/terminal-emulator";
+import {
+  PaneFocusProvider,
+  PaneProvider,
+  createPaneFocusContextValue,
+  type PaneContextValue,
+} from "@/panels/pane-context";
+import {
+  clearActivePaneFindPaneId,
+  handlePaneFindKeyboardAction,
+  setActivePaneFindPaneId,
+} from "@/panels/pane-find-registry";
+
+interface FindResultChange {
+  resultIndex: number;
+  resultCount: number;
+}
+
+interface TerminalKeyInput {
+  key: string;
+  ctrl: boolean;
+  shift: boolean;
+  alt: boolean;
+  meta: boolean;
+}
+
+interface MockTerminalEmulatorProps {
+  testId?: string;
+  onTerminalKey?: (input: TerminalKeyInput) => Promise<void> | void;
+}
+
+const { client, findListeners, terminalProps, theme, terminalHandle, resetTerminalHandle } =
+  vi.hoisted(() => {
+    const listeners: Array<(event: FindResultChange) => void> = [];
+    const handle = {
+      writeOutput: vi.fn(),
+      restoreOutput: vi.fn(),
+      renderSnapshot: vi.fn(),
+      clear: vi.fn(),
+      blur: vi.fn(),
+      findNext: vi.fn(() => true),
+      findPrevious: vi.fn(() => true),
+      clearFindDecorations: vi.fn(),
+      onFindResultsChanged: vi.fn((listener: (event: FindResultChange) => void) => {
+        listeners.push(listener);
+        return () => {
+          const index = listeners.indexOf(listener);
+          if (index >= 0) {
+            listeners.splice(index, 1);
+          }
+        };
+      }),
+    };
+    return {
+      client: {
+        on: vi.fn(() => () => {}),
+        sendTerminalInput: vi.fn(),
+      },
+      findListeners: listeners,
+      terminalProps: {
+        current: null as null | MockTerminalEmulatorProps,
+      },
+      terminalHandle: handle,
+      resetTerminalHandle: () => {
+        handle.writeOutput.mockClear();
+        handle.renderSnapshot.mockClear();
+        handle.clear.mockClear();
+        handle.findNext.mockClear();
+        handle.findPrevious.mockClear();
+        handle.clearFindDecorations.mockClear();
+        handle.onFindResultsChanged.mockClear();
+        listeners.splice(0);
+      },
+      theme: {
+        spacing: { 1: 4, 2: 8, 3: 12, 4: 16 },
+        fontSize: { xs: 11, sm: 13 },
+        fontWeight: { medium: "500" as const },
+        borderRadius: { md: 6 },
+        colors: {
+          background: "#000",
+          border: "#333",
+          destructive: "#f43f5e",
+          foreground: "#fff",
+          foregroundMuted: "#aaa",
+          primary: "#0a84ff",
+          surface0: "#111",
+          surface1: "#222",
+          surface2: "#333",
+          terminal: {
+            background: "#000",
+            foreground: "#fff",
+            cursor: "#fff",
+            cursorAccent: "#000",
+            selectionBackground: "#444",
+            selectionForeground: "#fff",
+            black: "#000",
+            red: "#f00",
+            green: "#0f0",
+            yellow: "#ff0",
+            blue: "#00f",
+            magenta: "#f0f",
+            cyan: "#0ff",
+            white: "#fff",
+            brightBlack: "#555",
+            brightRed: "#f55",
+            brightGreen: "#5f5",
+            brightYellow: "#ff5",
+            brightBlue: "#55f",
+            brightMagenta: "#f5f",
+            brightCyan: "#5ff",
+            brightWhite: "#fff",
+          },
+        },
+      },
+    };
+  });
+
+vi.mock("react-native", () => {
+  const MockView = ({ children, testID }: { children?: React.ReactNode; testID?: string }) =>
+    React.createElement("div", { "data-testid": testID }, children);
+  const MockText = ({ children }: { children?: React.ReactNode }) =>
+    React.createElement("span", null, children);
+  const MockPressable = ({
+    children,
+    disabled,
+    onPress,
+    testID,
+  }: {
+    children?: React.ReactNode;
+    disabled?: boolean;
+    onPress?: () => void;
+    testID?: string;
+  }) =>
+    React.createElement(
+      "button",
+      {
+        "data-testid": testID,
+        disabled,
+        onClick: () => {
+          if (!disabled) {
+            onPress?.();
+          }
+        },
+        type: "button",
+      },
+      children,
+    );
+  const MockTextInput = React.forwardRef<
+    HTMLInputElement,
+    {
+      value?: string;
+      onChangeText?: (text: string) => void;
+      onKeyPress?: (event: {
+        nativeEvent: { key: string; shiftKey?: boolean };
+        preventDefault: () => void;
+      }) => void;
+      testID?: string;
+      placeholder?: string;
+    }
+  >(function TextInput({ value, onChangeText, onKeyPress, testID, placeholder }, ref) {
+    return React.createElement("input", {
+      "data-testid": testID,
+      onChange: (event: React.ChangeEvent<HTMLInputElement>) =>
+        onChangeText?.(event.currentTarget.value),
+      onKeyDown: (event: React.KeyboardEvent<HTMLInputElement>) =>
+        onKeyPress?.({
+          nativeEvent: { key: event.key, shiftKey: event.shiftKey },
+          preventDefault: () => event.preventDefault(),
+        }),
+      placeholder,
+      ref,
+      value: value ?? "",
+    });
+  });
+
+  return {
+    ActivityIndicator: () => React.createElement("span", { "data-testid": "activity" }),
+    Platform: {
+      OS: "web",
+      select: (options: Record<string, unknown>) => options.web ?? options.default,
+    },
+    Pressable: MockPressable,
+    ScrollView: MockView,
+    Text: MockText,
+    TextInput: MockTextInput,
+    View: MockView,
+  };
+});
+
+vi.mock("react-native-reanimated", () => ({
+  default: {
+    View: ({ children }: { children?: React.ReactNode }) =>
+      React.createElement("div", null, children),
+  },
+  runOnJS: (fn: () => void) => fn,
+  useAnimatedReaction: vi.fn(),
+}));
+
+vi.mock("react-native-unistyles", () => ({
+  StyleSheet: {
+    absoluteFillObject: {},
+    hairlineWidth: 1,
+    create: (factory: unknown) =>
+      Object.prototype.toString.call(factory) === "[object Function]"
+        ? (factory as (value: unknown) => unknown)(theme)
+        : factory,
+  },
+  useUnistyles: () => ({ theme }),
+}));
+
+vi.mock("lucide-react-native", () => {
+  const createIcon = (name: string) =>
+    function Icon() {
+      return React.createElement("span", { "data-icon": name });
+    };
+  return {
+    ChevronDown: createIcon("ChevronDown"),
+    ChevronUp: createIcon("ChevronUp"),
+    X: createIcon("X"),
+  };
+});
+
+vi.mock("@/runtime/host-runtime", () => ({
+  useHostRuntimeClient: () => client,
+  useHostRuntimeIsConnected: () => true,
+}));
+
+vi.mock("@/hooks/use-app-visible", () => ({
+  useAppVisible: () => true,
+}));
+
+vi.mock("@/hooks/use-keyboard-shift-style", () => ({
+  useKeyboardShiftStyle: () => ({
+    shift: { value: 0 },
+    style: null,
+  }),
+}));
+
+vi.mock("@/hooks/use-settings", () => ({
+  useAppSettings: () => ({ settings: { terminalScrollbackLines: 1000 } }),
+}));
+
+vi.mock("@/constants/layout", () => ({
+  useIsCompactFormFactor: () => false,
+}));
+
+vi.mock("@/stores/panel-store", () => ({
+  usePanelStore: (
+    selector: (state: { mobileView: string; showMobileAgentList: () => void }) => unknown,
+  ) => selector({ mobileView: "agent", showMobileAgentList: vi.fn() }),
+}));
+
+vi.mock("@/terminal/runtime/workspace-terminal-session", () => ({
+  getWorkspaceTerminalSession: () => ({
+    snapshots: {
+      clear: vi.fn(),
+      get: vi.fn(() => null),
+      set: vi.fn(),
+    },
+  }),
+}));
+
+vi.mock("@/terminal/runtime/terminal-stream-controller", () => ({
+  TerminalStreamController: class {
+    dispose() {}
+    setTerminal() {}
+  },
+}));
+
+vi.mock("@/components/terminal-emulator", () => ({
+  default: React.forwardRef<TerminalEmulatorHandle, MockTerminalEmulatorProps>(
+    function TerminalEmulator(props, ref) {
+      terminalProps.current = props;
+      useImperativeHandle(ref, () => terminalHandle);
+      return React.createElement("div", { "data-testid": props.testId ?? "terminal-surface" });
+    },
+  ),
+}));
+
+const paneInstanceId = "server-a:workspace-a:left";
+const paneContext: PaneContextValue = {
+  serverId: "server-a",
+  workspaceId: "workspace-a",
+  paneInstanceId,
+  tabId: "terminal",
+  target: { kind: "terminal", terminalId: "terminal-a" },
+  openTab: () => {},
+  closeCurrentTab: () => {},
+  retargetCurrentTab: () => {},
+  openFileInWorkspace: () => {},
+  openImportSheet: () => {},
+};
+const paneFocus = createPaneFocusContextValue({
+  isPaneFocused: true,
+  isWorkspaceFocused: true,
+});
+
+let root: Root | null = null;
+let container: HTMLElement | null = null;
+
+beforeEach(() => {
+  vi.stubGlobal("IS_REACT_ACT_ENVIRONMENT", true);
+  resetTerminalHandle();
+  client.sendTerminalInput.mockClear();
+  client.on.mockClear();
+  terminalProps.current = null;
+  container = document.createElement("div");
+  document.body.appendChild(container);
+  root = createRoot(container);
+});
+
+afterEach(() => {
+  if (root) {
+    act(() => {
+      root?.unmount();
+    });
+  }
+  clearActivePaneFindPaneId(paneInstanceId);
+  root = null;
+  container?.remove();
+  container = null;
+  vi.unstubAllGlobals();
+});
+
+function renderTerminalPane(): void {
+  act(() => {
+    root?.render(
+      <PaneProvider value={paneContext}>
+        <PaneFocusProvider value={paneFocus}>
+          <TerminalPane
+            serverId="server-a"
+            cwd="/repo"
+            terminalId="terminal-a"
+            isWorkspaceFocused
+            isPaneFocused
+            onOpenFileExplorer={vi.fn()}
+            onOpenWorkspaceFile={vi.fn()}
+          />
+        </PaneFocusProvider>
+      </PaneProvider>,
+    );
+  });
+  setActivePaneFindPaneId(paneInstanceId);
+}
+
+function inputElement(): HTMLInputElement {
+  const input = container?.querySelector('[data-testid="pane-find-input"]');
+  expect(input).toBeInstanceOf(HTMLInputElement);
+  return input as HTMLInputElement;
+}
+
+function changeInput(value: string): void {
+  const input = inputElement();
+  act(() => {
+    const valueSetter = Object.getOwnPropertyDescriptor(HTMLInputElement.prototype, "value")?.set;
+    valueSetter?.call(input, value);
+    input.dispatchEvent(new Event("input", { bubbles: true }));
+    input.dispatchEvent(new Event("change", { bubbles: true }));
+  });
+}
+
+function pressFindKey(key: string, shiftKey = false): void {
+  act(() => {
+    inputElement().dispatchEvent(new KeyboardEvent("keydown", { key, shiftKey, bubbles: true }));
+  });
+}
+
+function click(testId: string): void {
+  const element = container?.querySelector(`[data-testid="${testId}"]`);
+  expect(element).toBeInstanceOf(HTMLElement);
+  act(() => {
+    element?.dispatchEvent(new MouseEvent("click", { bubbles: true }));
+  });
+}
+
+function emitFindResults(event: FindResultChange): void {
+  act(() => {
+    for (const listener of findListeners) {
+      listener(event);
+    }
+  });
+}
+
+describe("TerminalPane find", () => {
+  it("searches through xterm, navigates matches, and clears decorations", () => {
+    renderTerminalPane();
+
+    act(() => {
+      handlePaneFindKeyboardAction({ id: "workspace.find.open", scope: "workspace" });
+    });
+    changeInput("needle");
+    expect(container?.textContent).toContain("Searching...");
+    emitFindResults({ resultIndex: 2, resultCount: 7 });
+
+    expect(terminalHandle.findNext).toHaveBeenCalledWith({ query: "needle" });
+    expect(container?.textContent).toContain("3 / 7");
+
+    click("pane-find-next");
+    expect(terminalHandle.findNext).toHaveBeenLastCalledWith({ query: "needle" });
+    expect(container?.textContent).toContain("Searching...");
+    emitFindResults({ resultIndex: 3, resultCount: 7 });
+
+    click("pane-find-prev");
+    expect(terminalHandle.findPrevious).toHaveBeenLastCalledWith({ query: "needle" });
+    emitFindResults({ resultIndex: 2, resultCount: 7 });
+
+    pressFindKey("Enter");
+    expect(terminalHandle.findNext).toHaveBeenLastCalledWith({ query: "needle" });
+    emitFindResults({ resultIndex: 3, resultCount: 7 });
+
+    pressFindKey("Enter", true);
+    expect(terminalHandle.findPrevious).toHaveBeenLastCalledWith({ query: "needle" });
+
+    changeInput("");
+    expect(terminalHandle.clearFindDecorations).toHaveBeenCalledTimes(1);
+    expect(container?.textContent).toContain("0 / 0");
+
+    changeInput("needle");
+    click("pane-find-close");
+    expect(terminalHandle.clearFindDecorations).toHaveBeenCalledTimes(2);
+    expect(container?.querySelector('[data-testid="pane-find-input"]')).toBeNull();
+  });
+
+  it("keeps terminal key input flowing while the find bar is open", async () => {
+    renderTerminalPane();
+
+    act(() => {
+      handlePaneFindKeyboardAction({ id: "workspace.find.open", scope: "workspace" });
+    });
+    await act(async () => {
+      await terminalProps.current?.onTerminalKey?.({
+        key: "c",
+        ctrl: true,
+        shift: false,
+        alt: false,
+        meta: false,
+      });
+    });
+
+    expect(client.sendTerminalInput).toHaveBeenCalledWith("terminal-a", {
+      type: "input",
+      data: "\u0003",
+    });
+  });
+});

packages/app/src/components/terminal-pane.tsx

@@ -1,4 +1,4 @@
-import { useCallback, useEffect, useMemo, useRef, useState } from "react";
+import React, { useCallback, useEffect, useMemo, useRef, useState } from "react";
 import {
   ActivityIndicator,
   Pressable,
@@ -47,6 +47,8 @@ import {
   type OpenFileDisposition,
   type WorkspaceFileOpenRequest,
 } from "@/workspace/file-open";
+import { FindBar, usePaneFind, type PaneFindMatchState } from "@/panels/pane-find";
+import type { TerminalFindResultChangeEvent } from "@/terminal/runtime/terminal-emulator-runtime";
 
 interface TerminalPaneProps {
   serverId: string;
@@ -106,10 +108,25 @@ const EMPTY_MODIFIERS: ModifierState = {
   alt: false,
 };
 
+const EMPTY_FIND_MATCH_STATE: PaneFindMatchState = { status: "empty" };
+const NO_FIND_MATCH_STATE: PaneFindMatchState = { status: "no-match" };
+const PENDING_FIND_MATCH_STATE: PaneFindMatchState = { status: "pending" };
+
 function terminalScopeKey(input: { serverId: string; cwd: string }): string {
   return `${input.serverId}:${input.cwd}`;
 }
 
+function terminalFindStateFromResult(event: TerminalFindResultChangeEvent): PaneFindMatchState {
+  if (event.resultCount <= 0 || event.resultIndex < 0) {
+    return NO_FIND_MATCH_STATE;
+  }
+  return {
+    status: "matched",
+    current: event.resultIndex + 1,
+    total: event.resultCount,
+  };
+}
+
 interface ModifierButtonProps {
   modifier: keyof ModifierState;
   active: boolean;
@@ -212,9 +229,16 @@ export function TerminalPane({
     win32InputMode: false,
   });
   const pendingTerminalInputRef = useRef<PendingTerminalInput[]>([]);
+  const terminalFindQueryRef = useRef("");
   const keyboardRefitTimeoutsRef = useRef<Array<ReturnType<typeof setTimeout>>>([]);
   const lastAutoFocusKeyRef = useRef<string | null>(null);
   const initialSnapshot = workspaceTerminalSession.snapshots.get({ terminalId });
+  const [terminalFindMatchState, setTerminalFindMatchStateValue] =
+    useState<PaneFindMatchState>(EMPTY_FIND_MATCH_STATE);
+
+  const setTerminalFindMatchState = useCallback((nextState: PaneFindMatchState) => {
+    setTerminalFindMatchStateValue(nextState);
+  }, []);
 
   useEffect(() => {
     terminalIdRef.current = terminalId;
@@ -224,6 +248,19 @@ export function TerminalPane({
     };
   }, [terminalId]);
 
+  useEffect(() => {
+    if (!isWorkspaceFocused || !terminalId) {
+      return;
+    }
+
+    return emulatorRef.current?.onFindResultsChanged((event) => {
+      if (terminalFindQueryRef.current.length === 0) {
+        return;
+      }
+      setTerminalFindMatchState(terminalFindStateFromResult(event));
+    });
+  }, [isWorkspaceFocused, setTerminalFindMatchState, terminalId]);
+
   const requestTerminalFocus = useCallback(() => {
     setFocusRequestToken((current) => current + 1);
   }, []);
@@ -251,6 +288,43 @@ export function TerminalPane({
     [terminalId, terminalStreamKey, workspaceTerminalSession.snapshots],
   );
 
+  const clearTerminalFind = useCallback(() => {
+    terminalFindQueryRef.current = "";
+    emulatorRef.current?.clearFindDecorations();
+    setTerminalFindMatchState(EMPTY_FIND_MATCH_STATE);
+  }, [setTerminalFindMatchState]);
+
+  const runTerminalFind = useCallback(
+    (query: string, direction: "next" | "previous"): PaneFindMatchState => {
+      terminalFindQueryRef.current = query;
+      if (query.length === 0) {
+        clearTerminalFind();
+        return EMPTY_FIND_MATCH_STATE;
+      }
+
+      const found =
+        direction === "previous"
+          ? (emulatorRef.current?.findPrevious({ query }) ?? false)
+          : (emulatorRef.current?.findNext({ query }) ?? false);
+      if (!found) {
+        setTerminalFindMatchState(NO_FIND_MATCH_STATE);
+        return NO_FIND_MATCH_STATE;
+      }
+
+      setTerminalFindMatchState(PENDING_FIND_MATCH_STATE);
+      return PENDING_FIND_MATCH_STATE;
+    },
+    [clearTerminalFind, setTerminalFindMatchState],
+  );
+
+  const paneFind = usePaneFind({
+    matchState: terminalFindMatchState,
+    onQuery: (query) => runTerminalFind(query, "next"),
+    onNext: () => runTerminalFind(terminalFindQueryRef.current, "next"),
+    onPrev: () => runTerminalFind(terminalFindQueryRef.current, "previous"),
+    onClose: clearTerminalFind,
+  });
+
   useEffect(() => {
     if (isMobile || !isWorkspaceFocused || !isPaneFocused || !terminalId) {
       lastAutoFocusKeyRef.current = null;
@@ -748,6 +822,7 @@ export function TerminalPane({
 
   return (
     <Animated.View style={containerStyle}>
+      {paneFind.isOpen ? <FindBar {...paneFind.findBarProps} /> : null}
       <View style={styles.outputContainer}>
         {isWorkspaceFocused ? (
           <View style={styles.terminalGestureContainer}>

packages/app/src/desktop/host.ts

@@ -92,10 +92,35 @@ export interface DesktopBrowserShortcutEvent {
   action: "focus-url";
 }
 
+export interface DesktopBrowserFindOptions {
+  forward?: boolean;
+  findNext?: boolean;
+  matchCase?: boolean;
+}
+
+export type DesktopBrowserFindAction = "clearSelection" | "keepSelection" | "activateSelection";
+
+export interface DesktopBrowserFoundInPageResult {
+  requestId?: number;
+  activeMatchOrdinal?: number;
+  matches?: number;
+  finalUpdate?: boolean;
+}
+
 export interface DesktopBrowserBridge {
   setWorkspaceActiveBrowser?: (browserId: string | null) => Promise<void>;
   openDevTools?: (browserId: string) => Promise<unknown>;
   clearPartition?: (browserId: string) => Promise<void>;
+  findInPage: (
+    browserId: string,
+    text: string,
+    options?: DesktopBrowserFindOptions,
+  ) => Promise<number | null> | number | null;
+  stopFindInPage: (browserId: string, action: DesktopBrowserFindAction) => Promise<void> | void;
+  onFoundInPage: (
+    browserId: string,
+    listener: (result: DesktopBrowserFoundInPageResult) => void,
+  ) => Promise<() => void> | (() => void);
 }
 
 export interface DesktopInvokeBridge {

packages/app/src/hooks/use-keyboard-shortcuts.ts

@@ -27,6 +27,25 @@ import {
   navigateToLastWorkspace,
   useActiveWorkspaceSelection,
 } from "@/stores/navigation-active-workspace-store";
+import { handlePaneFindKeyboardAction } from "@/panels/pane-find-registry";
+
+type KeyboardShortcutResult = ReturnType<typeof resolveKeyboardShortcut>;
+
+function applyPendingChordEventHandling(event: KeyboardEvent, result: KeyboardShortcutResult) {
+  if (result.preventDefault && !result.match) {
+    event.preventDefault();
+    event.stopPropagation();
+  }
+}
+
+function applyHandledShortcutEventHandling(event: KeyboardEvent, result: KeyboardShortcutResult) {
+  if (result.preventDefault || result.match?.preventDefault) {
+    event.preventDefault();
+  }
+  if (result.preventDefault || result.match?.stopPropagation) {
+    event.stopPropagation();
+  }
+}
 
 export function useKeyboardShortcuts({
   enabled,
@@ -94,6 +113,8 @@ export function useKeyboardShortcuts({
           return false;
         case "dispatch":
           return keyboardActionDispatcher.dispatch(action.action);
+        case "pane-find-open":
+          return handlePaneFindKeyboardAction({ id: "workspace.find.open", scope: "workspace" });
         case "navigate-workspace":
           navigateToWorkspace(action.serverId, action.workspaceId, { currentPathname: pathname });
           return true;
@@ -182,10 +203,7 @@ export function useKeyboardShortcuts({
 
       chordStateRef.current = result.nextChordState;
 
-      if (result.preventDefault) {
-        event.preventDefault();
-        event.stopPropagation();
-      }
+      applyPendingChordEventHandling(event, result);
 
       if (!result.match) {
         return;
@@ -208,12 +226,7 @@ export function useKeyboardShortcuts({
         return;
       }
 
-      if (result.match.preventDefault) {
-        event.preventDefault();
-      }
-      if (result.match.stopPropagation) {
-        event.stopPropagation();
-      }
+      applyHandledShortcutEventHandling(event, result);
     };
 
     const handleKeyUp = (event: KeyboardEvent) => {

packages/app/src/keyboard/actions.ts

@@ -20,6 +20,7 @@ export type KeyboardActionId =
   | "agent.new"
   | "workspace.tab.new"
   | "workspace.tab.close.current"
+  | "workspace.find.open"
   | "workspace.tab.navigate.index"
   | "workspace.tab.navigate.relative"
   | "workspace.pane.split.right"

packages/app/src/keyboard/keyboard-shortcuts.test.ts

@@ -206,6 +206,18 @@ describe("keyboard-shortcuts", () => {
       context: { isMac: true, isDesktop: true },
       action: "workspace.tab.close.current",
     },
+    {
+      name: "matches Cmd+F to open find in the focused pane",
+      event: { key: "f", code: "KeyF", metaKey: true },
+      context: { isMac: true, focusScope: "terminal" },
+      action: "workspace.find.open",
+    },
+    {
+      name: "matches Ctrl+F to open find in the focused pane on non-mac",
+      event: { key: "f", code: "KeyF", ctrlKey: true },
+      context: { isMac: false, focusScope: "terminal" },
+      action: "workspace.find.open",
+    },
     {
       name: "matches Ctrl+W to close current tab on non-mac desktop",
       event: { key: "w", code: "KeyW", ctrlKey: true },
@@ -540,6 +552,7 @@ describe("keyboard-shortcut help sections", () => {
         "workspace-jump-index": ["alt", "1-9"],
         "workspace-tab-jump-index": ["alt", "shift", "1-9"],
         "workspace-tab-close-current": ["alt", "shift", "W"],
+        "workspace-find-open": ["mod", "F"],
         "workspace-pane-split-right": ["mod", "\\"],
         "workspace-pane-close": ["mod", "shift", "W"],
       },
@@ -553,6 +566,7 @@ describe("keyboard-shortcut help sections", () => {
         "workspace-jump-index": ["mod", "1-9"],
         "workspace-tab-jump-index": ["mod", "alt", "1-9"],
         "workspace-tab-close-current": ["meta", "W"],
+        "workspace-find-open": ["mod", "F"],
         "workspace-pane-split-right": ["mod", "\\"],
         "workspace-pane-close": ["mod", "shift", "W"],
       },

packages/app/src/keyboard/keyboard-shortcuts.ts

@@ -250,6 +250,32 @@ const SHORTCUT_BINDINGS: readonly ShortcutBinding[] = [
     },
   },
 
+  // --- Find in pane ---
+  {
+    id: "workspace-find-open-cmd-f-mac",
+    action: "workspace.find.open",
+    combo: "Cmd+F",
+    when: { mac: true, commandCenter: false },
+    help: {
+      id: "workspace-find-open",
+      section: "tabs-panes",
+      label: "Find in pane",
+      keys: ["mod", "F"],
+    },
+  },
+  {
+    id: "workspace-find-open-ctrl-f-non-mac",
+    action: "workspace.find.open",
+    combo: "Ctrl+F",
+    when: { mac: false, commandCenter: false },
+    help: {
+      id: "workspace-find-open",
+      section: "tabs-panes",
+      label: "Find in pane",
+      keys: ["mod", "F"],
+    },
+  },
+
   // --- Workspace index jump ---
   {
     id: "workspace-navigate-index-cmd-digit-mac",

packages/app/src/keyboard/route-shortcut.ts

@@ -37,7 +37,8 @@ export type ShortcutAction =
   | { kind: "open-project-picker" }
   | { kind: "callback"; name: ShortcutCallbackName }
   | { kind: "command-center-toggle"; nextOpen: boolean }
-  | { kind: "shortcuts-dialog-toggle"; nextOpen: boolean };
+  | { kind: "shortcuts-dialog-toggle"; nextOpen: boolean }
+  | { kind: "pane-find-open" };
 
 const NONE: ShortcutAction = { kind: "none" };
 
@@ -201,6 +202,8 @@ export function routeKeyboardShortcut(
       return { kind: "command-center-toggle", nextOpen: !ctx.commandCenterOpen };
     case "shortcuts.dialog.toggle":
       return { kind: "shortcuts-dialog-toggle", nextOpen: !ctx.shortcutsDialogOpen };
+    case "workspace.find.open":
+      return { kind: "pane-find-open" };
     default:
       return NONE;
   }

packages/app/src/panels/pane-context.tsx

@@ -6,6 +6,7 @@ import type { WorkspaceFileOpenRequest } from "@/workspace/file-open";
 export interface PaneContextValue {
   serverId: string;
   workspaceId: string;
+  paneInstanceId: string | null;
   tabId: string;
   target: WorkspaceTabTarget;
   openTab: (target: WorkspaceTabTarget) => void;

packages/app/src/panels/pane-find-registry.test.ts

@@ -0,0 +1,116 @@
+import { describe, expect, it, vi } from "vitest";
+
+import {
+  clearActivePaneFindPaneId,
+  createPaneFindRegistry,
+  handlePaneFindKeyboardAction,
+  paneFindRegistry,
+  setActivePaneFindPaneId,
+  type PaneFindController,
+} from "@/panels/pane-find-registry";
+
+function createController(input?: { openResult?: boolean }): PaneFindController {
+  return {
+    openFind: vi.fn(() => input?.openResult ?? true),
+    closeFind: vi.fn(() => true),
+  };
+}
+
+describe("pane find registry", () => {
+  it("routes open find to the active pane instance", () => {
+    const activePaneId = { current: "server:workspace:left" };
+    const registry = createPaneFindRegistry({
+      getActivePaneId: () => activePaneId.current,
+    });
+    const left = createController({ openResult: false });
+    const right = createController({ openResult: true });
+
+    registry.register({
+      paneId: "server:workspace:left",
+      controller: left,
+    });
+    registry.register({
+      paneId: "server:workspace:right",
+      controller: right,
+    });
+
+    expect(registry.openFindInActivePane()).toBe(false);
+  });
+
+  it("stops routing to a pane after it unregisters", () => {
+    const registry = createPaneFindRegistry({
+      getActivePaneId: () => "server:workspace:left",
+    });
+    const controller = createController();
+
+    const unregister = registry.register({
+      paneId: "server:workspace:left",
+      controller,
+    });
+    unregister();
+
+    expect(registry.openFindInActivePane()).toBe(false);
+    expect(controller.closeFind).toHaveBeenCalledTimes(1);
+  });
+
+  it("keeps split panes with the same target distinct by pane instance", () => {
+    const activePaneId = { current: "server:workspace:right" };
+    const registry = createPaneFindRegistry({
+      getActivePaneId: () => activePaneId.current,
+    });
+    const left = createController({ openResult: false });
+    const right = createController({ openResult: true });
+
+    registry.register({
+      paneId: "server:workspace:left",
+      controller: left,
+    });
+    registry.register({
+      paneId: "server:workspace:right",
+      controller: right,
+    });
+
+    expect(registry.openFindInActivePane()).toBe(true);
+  });
+
+  it("handles the keyboard find action through the active pane", () => {
+    const controller = createController();
+    const unregister = paneFindRegistry.register({
+      paneId: "server:workspace:left",
+      controller,
+    });
+    setActivePaneFindPaneId("server:workspace:left");
+
+    expect(handlePaneFindKeyboardAction({ id: "workspace.find.open", scope: "workspace" })).toBe(
+      true,
+    );
+    expect(controller.openFind).toHaveBeenCalledTimes(1);
+
+    clearActivePaneFindPaneId("server:workspace:left");
+    expect(controller.closeFind).toHaveBeenCalledTimes(1);
+    unregister();
+  });
+
+  it("closes the previous active pane when pane focus changes", () => {
+    const left = createController();
+    const right = createController();
+    const unregisterLeft = paneFindRegistry.register({
+      paneId: "server:workspace:left",
+      controller: left,
+    });
+    const unregisterRight = paneFindRegistry.register({
+      paneId: "server:workspace:right",
+      controller: right,
+    });
+
+    setActivePaneFindPaneId("server:workspace:left");
+    setActivePaneFindPaneId("server:workspace:right");
+
+    expect(left.closeFind).toHaveBeenCalledTimes(1);
+    expect(right.closeFind).not.toHaveBeenCalled();
+
+    clearActivePaneFindPaneId("server:workspace:right");
+    unregisterLeft();
+    unregisterRight();
+  });
+});

packages/app/src/panels/pane-find-registry.ts

@@ -0,0 +1,82 @@
+export interface PaneFindController {
+  openFind(): boolean;
+  closeFind(): boolean;
+}
+
+interface PaneFindKeyboardAction {
+  id: "workspace.find.open";
+  scope: "workspace";
+}
+
+interface RegisterPaneFindInput {
+  paneId: string;
+  controller: PaneFindController;
+}
+
+interface PaneFindRegistry {
+  register(input: RegisterPaneFindInput): () => void;
+  openFindInActivePane(): boolean;
+  closeFindInPane(paneId: string): boolean;
+}
+
+export function createPaneFindRegistry(input: { getActivePaneId: () => string | null }) {
+  const controllers = new Map<string, PaneFindController>();
+
+  return {
+    register({ paneId, controller }: RegisterPaneFindInput) {
+      controllers.set(paneId, controller);
+
+      return () => {
+        if (controllers.get(paneId) === controller) {
+          controller.closeFind();
+          controllers.delete(paneId);
+        }
+      };
+    },
+
+    openFindInActivePane(): boolean {
+      const activePaneId = input.getActivePaneId();
+      if (!activePaneId) {
+        return false;
+      }
+      return controllers.get(activePaneId)?.openFind() ?? false;
+    },
+
+    closeFindInPane(paneId: string): boolean {
+      return controllers.get(paneId)?.closeFind() ?? false;
+    },
+  } satisfies PaneFindRegistry;
+}
+
+let activePaneId: string | null = null;
+
+export const paneFindRegistry = createPaneFindRegistry({
+  getActivePaneId: () => activePaneId,
+});
+
+export function createPaneFindPaneId(input: {
+  serverId: string;
+  workspaceId: string;
+  paneId: string;
+}): string {
+  return `${input.serverId}:${input.workspaceId}:${input.paneId}`;
+}
+
+export function setActivePaneFindPaneId(paneId: string | null) {
+  if (activePaneId && activePaneId !== paneId) {
+    paneFindRegistry.closeFindInPane(activePaneId);
+  }
+  activePaneId = paneId;
+}
+
+export function clearActivePaneFindPaneId(paneId: string) {
+  if (activePaneId === paneId) {
+    paneFindRegistry.closeFindInPane(paneId);
+    activePaneId = null;
+  }
+}
+
+export function handlePaneFindKeyboardAction(action: PaneFindKeyboardAction): boolean {
+  void action;
+  return paneFindRegistry.openFindInActivePane();
+}

packages/app/src/panels/pane-find.test.tsx

@@ -0,0 +1,503 @@
+/**
+ * @vitest-environment jsdom
+ */
+import React from "react";
+import { act } from "react";
+import { createRoot, type Root } from "react-dom/client";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+import { Text, View } from "react-native";
+import {
+  FindBar,
+  usePaneFind,
+  type PaneFindCommandResult,
+  type PaneFindMatchState,
+} from "@/panels/pane-find";
+import {
+  PaneFocusProvider,
+  PaneProvider,
+  createPaneFocusContextValue,
+  usePaneContext,
+  type PaneContextValue,
+} from "@/panels/pane-context";
+import {
+  clearActivePaneFindPaneId,
+  createPaneFindPaneId,
+  handlePaneFindKeyboardAction,
+  setActivePaneFindPaneId,
+} from "@/panels/pane-find-registry";
+import {
+  buildWorkspacePaneContentModel,
+  WorkspacePaneContent,
+} from "@/screens/workspace/workspace-pane-content";
+import type { WorkspaceTabDescriptor } from "@/screens/workspace/workspace-tabs-types";
+
+const { theme } = vi.hoisted(() => ({
+  theme: {
+    colors: {
+      border: "#333",
+      foreground: "#fff",
+      foregroundMuted: "#aaa",
+      surface0: "#111",
+      surface1: "#222",
+    },
+  },
+}));
+
+vi.mock("lucide-react-native", () => {
+  const createIcon = (name: string) =>
+    function Icon() {
+      return React.createElement("span", { "data-icon": name });
+    };
+
+  return {
+    ChevronDown: createIcon("ChevronDown"),
+    ChevronUp: createIcon("ChevronUp"),
+    X: createIcon("X"),
+  };
+});
+
+vi.mock("react-native", () => {
+  const MockView = ({ children, testID }: { children?: React.ReactNode; testID?: string }) =>
+    React.createElement("div", { "data-testid": testID }, children);
+  const MockText = ({ children }: { children?: React.ReactNode }) =>
+    React.createElement("span", null, children);
+  const MockPressable = ({
+    children,
+    disabled,
+    onPress,
+    testID,
+  }: {
+    children?: React.ReactNode;
+    disabled?: boolean;
+    onPress?: () => void;
+    testID?: string;
+  }) =>
+    React.createElement(
+      "button",
+      {
+        "data-testid": testID,
+        disabled,
+        onClick: () => {
+          if (!disabled) onPress?.();
+        },
+        type: "button",
+      },
+      children,
+    );
+  const MockTextInput = React.forwardRef<
+    HTMLInputElement,
+    {
+      value?: string;
+      onChangeText?: (text: string) => void;
+      onKeyPress?: (event: {
+        nativeEvent: { key: string; shiftKey?: boolean };
+        preventDefault: () => void;
+      }) => void;
+      testID?: string;
+      placeholder?: string;
+    }
+  >(function TextInput({ value, onChangeText, onKeyPress, testID, placeholder }, ref) {
+    return React.createElement("input", {
+      "data-testid": testID,
+      onChange: (event: React.ChangeEvent<HTMLInputElement>) =>
+        onChangeText?.(event.currentTarget.value),
+      onKeyDown: (event: React.KeyboardEvent<HTMLInputElement>) =>
+        onKeyPress?.({
+          nativeEvent: { key: event.key, shiftKey: event.shiftKey },
+          preventDefault: () => event.preventDefault(),
+        }),
+      placeholder,
+      ref,
+      value: value ?? "",
+    });
+  });
+
+  return { Pressable: MockPressable, Text: MockText, TextInput: MockTextInput, View: MockView };
+});
+
+vi.mock("react-native-unistyles", () => ({
+  StyleSheet: {
+    hairlineWidth: 1,
+    create: (factory: unknown) =>
+      typeof factory === "function" ? (factory as (t: typeof theme) => unknown)(theme) : factory,
+  },
+  useUnistyles: () => ({ theme }),
+}));
+
+vi.mock("@/panels/register-panels", () => ({
+  ensurePanelsRegistered: vi.fn(),
+}));
+
+vi.mock("@/panels/panel-registry", () => ({
+  getPanelRegistration: () => ({
+    kind: "agent",
+    component: FakeFindPanel,
+    useDescriptor: vi.fn(),
+  }),
+}));
+
+interface FakeSearchController {
+  query: ReturnType<typeof vi.fn<(query: string) => PaneFindCommandResult>>;
+  next: ReturnType<typeof vi.fn<() => PaneFindCommandResult>>;
+  prev: ReturnType<typeof vi.fn<() => PaneFindCommandResult>>;
+  close: ReturnType<typeof vi.fn<() => void>>;
+}
+
+const controllers = new Map<string, FakeSearchController>();
+
+function createController(input?: { total?: number }): FakeSearchController {
+  const total = input?.total ?? 3;
+  return {
+    query: vi.fn((query: string) =>
+      query === "missing" ? { status: "no-match" } : { status: "matched", current: 1, total },
+    ),
+    next: vi.fn(() => ({ status: "matched", current: 2, total })),
+    prev: vi.fn(() => ({ status: "matched", current: 3, total })),
+    close: vi.fn(),
+  };
+}
+
+function FakeFindPanel() {
+  const paneContext = usePaneContext();
+  const controller = controllers.get(paneContext.paneInstanceId ?? "");
+  if (!controller) {
+    throw new Error(`Missing fake find controller for pane ${paneContext.paneInstanceId}`);
+  }
+  const paneFind = usePaneFind({
+    onQuery: controller.query,
+    onNext: controller.next,
+    onPrev: controller.prev,
+    onClose: controller.close,
+  });
+
+  return (
+    <View>
+      {paneFind.isOpen ? <FindBar {...paneFind.findBarProps} /> : null}
+      <Text>Pane body</Text>
+    </View>
+  );
+}
+
+function AsyncFindPanel({
+  matchState,
+  onQuery,
+}: {
+  matchState: PaneFindMatchState;
+  onQuery: (query: string) => PaneFindCommandResult;
+}) {
+  const paneFind = usePaneFind({
+    matchState,
+    onQuery,
+    onNext: () => undefined,
+    onPrev: () => undefined,
+    onClose: vi.fn(),
+  });
+
+  return (
+    <View>
+      {paneFind.isOpen ? <FindBar {...paneFind.findBarProps} /> : null}
+      <Text>Pane body</Text>
+    </View>
+  );
+}
+
+const tab: WorkspaceTabDescriptor = {
+  key: "agent_agent-a",
+  tabId: "agent_agent-a",
+  kind: "agent",
+  target: { kind: "agent", agentId: "agent-a" },
+};
+const leftPaneInstanceId = createPaneFindPaneId({
+  serverId: "server-a",
+  workspaceId: "workspace-a",
+  paneId: "left",
+});
+const harnessPaneContext: PaneContextValue = {
+  serverId: "server-a",
+  workspaceId: "workspace-a",
+  paneInstanceId: leftPaneInstanceId,
+  tabId: "agent_agent-a",
+  target: tab.target,
+  openTab: () => {},
+  closeCurrentTab: () => {},
+  retargetCurrentTab: () => {},
+  openFileInWorkspace: () => {},
+  openImportSheet: () => {},
+};
+const harnessPaneFocus = createPaneFocusContextValue({
+  isPaneFocused: true,
+  isWorkspaceFocused: true,
+  onFocusPane: () => {},
+});
+
+let root: Root | null = null;
+let container: HTMLElement | null = null;
+
+beforeEach(() => {
+  vi.stubGlobal("IS_REACT_ACT_ENVIRONMENT", true);
+  container = document.createElement("div");
+  document.body.appendChild(container);
+  root = createRoot(container);
+});
+
+afterEach(() => {
+  if (root) {
+    act(() => {
+      root?.unmount();
+    });
+  }
+  clearActivePaneFindPaneId("server-a:workspace-a:left");
+  clearActivePaneFindPaneId("server-a:workspace-a:right");
+  controllers.clear();
+  root = null;
+  container?.remove();
+  container = null;
+  vi.unstubAllGlobals();
+});
+
+function renderFindHarness(controller: FakeSearchController = createController()) {
+  controllers.set(leftPaneInstanceId, controller);
+
+  act(() => {
+    root?.render(
+      <PaneProvider value={harnessPaneContext}>
+        <PaneFocusProvider value={harnessPaneFocus}>
+          <FakeFindPanel />
+        </PaneFocusProvider>
+      </PaneProvider>,
+    );
+  });
+
+  setActivePaneFindPaneId(leftPaneInstanceId);
+}
+
+function inputElement(): HTMLInputElement {
+  const input = container?.querySelector('[data-testid="pane-find-input"]');
+  expect(input).toBeInstanceOf(HTMLInputElement);
+  return input as HTMLInputElement;
+}
+
+function button(testId: string): HTMLElement {
+  const element = container?.querySelector(`[data-testid="${testId}"]`);
+  expect(element).toBeInstanceOf(HTMLElement);
+  return element as HTMLElement;
+}
+
+function changeInput(value: string): void {
+  const input = inputElement();
+  act(() => {
+    const valueSetter = Object.getOwnPropertyDescriptor(HTMLInputElement.prototype, "value")?.set;
+    valueSetter?.call(input, value);
+    input.dispatchEvent(new Event("input", { bubbles: true }));
+    input.dispatchEvent(new Event("change", { bubbles: true }));
+  });
+}
+
+function pressKey(key: string, shiftKey = false): void {
+  const input = inputElement();
+  act(() => {
+    input.dispatchEvent(new KeyboardEvent("keydown", { key, shiftKey, bubbles: true }));
+  });
+}
+
+describe("FindBar", () => {
+  it("opens through pane registration and focuses the query input", () => {
+    renderFindHarness();
+
+    expect(container?.querySelector('[data-testid="pane-find-input"]')).toBeNull();
+
+    act(() => {
+      handlePaneFindKeyboardAction({ id: "workspace.find.open", scope: "workspace" });
+    });
+
+    expect(inputElement()).toBe(document.activeElement);
+    expect(container?.textContent).toContain("Find");
+  });
+
+  it("dispatches query changes and renders match, empty, and no-match states", () => {
+    const controller = createController();
+    renderFindHarness(controller);
+
+    act(() => {
+      handlePaneFindKeyboardAction({ id: "workspace.find.open", scope: "workspace" });
+    });
+
+    expect(container?.textContent).toContain("0 / 0");
+
+    changeInput("abc");
+    expect(controller.query).toHaveBeenLastCalledWith("abc");
+    expect(container?.textContent).toContain("1 / 3");
+
+    changeInput("missing");
+    expect(container?.textContent).toContain("No matches");
+
+    changeInput("");
+    expect(container?.textContent).toContain("0 / 0");
+  });
+
+  it("handles next, previous, Escape, Enter, Shift+Enter, and close", () => {
+    const controller = createController();
+    renderFindHarness(controller);
+
+    act(() => {
+      handlePaneFindKeyboardAction({ id: "workspace.find.open", scope: "workspace" });
+    });
+    changeInput("abc");
+
+    pressKey("Enter");
+    expect(controller.next).toHaveBeenCalledTimes(1);
+    expect(container?.textContent).toContain("2 / 3");
+
+    pressKey("Enter", true);
+    expect(controller.prev).toHaveBeenCalledTimes(1);
+    expect(container?.textContent).toContain("3 / 3");
+
+    act(() => {
+      button("pane-find-next").dispatchEvent(new MouseEvent("click", { bubbles: true }));
+    });
+    expect(container?.textContent).toContain("2 / 3");
+
+    act(() => {
+      button("pane-find-prev").dispatchEvent(new MouseEvent("click", { bubbles: true }));
+    });
+    expect(container?.textContent).toContain("3 / 3");
+
+    pressKey("Escape");
+    expect(controller.close).toHaveBeenCalledTimes(1);
+    expect(container?.querySelector('[data-testid="pane-find-input"]')).toBeNull();
+
+    act(() => {
+      handlePaneFindKeyboardAction({ id: "workspace.find.open", scope: "workspace" });
+    });
+    act(() => {
+      button("pane-find-close").dispatchEvent(new MouseEvent("click", { bubbles: true }));
+    });
+    expect(container?.querySelector('[data-testid="pane-find-input"]')).toBeNull();
+  });
+
+  it("cleans up the active find adapter on pane deactivation and unmount", () => {
+    const controller = createController();
+    renderFindHarness(controller);
+
+    act(() => {
+      handlePaneFindKeyboardAction({ id: "workspace.find.open", scope: "workspace" });
+    });
+    changeInput("abc");
+
+    act(() => {
+      clearActivePaneFindPaneId(leftPaneInstanceId);
+    });
+    expect(controller.close).toHaveBeenCalledTimes(1);
+    expect(container?.querySelector('[data-testid="pane-find-input"]')).toBeNull();
+
+    act(() => {
+      setActivePaneFindPaneId(leftPaneInstanceId);
+      handlePaneFindKeyboardAction({ id: "workspace.find.open", scope: "workspace" });
+    });
+    changeInput("abc");
+    act(() => {
+      root?.unmount();
+    });
+    expect(controller.close).toHaveBeenCalledTimes(2);
+    root = null;
+  });
+
+  it("shows pending match metadata until an adapter-owned async result arrives", () => {
+    const onQuery = vi.fn(() => undefined);
+    let setExternalMatchState: ((matchState: PaneFindMatchState) => void) | null = null;
+
+    function Harness() {
+      const [externalMatchState, setMatchState] = React.useState<PaneFindMatchState>({
+        status: "empty",
+      });
+      setExternalMatchState = setMatchState;
+      return (
+        <PaneProvider value={harnessPaneContext}>
+          <PaneFocusProvider value={harnessPaneFocus}>
+            <AsyncFindPanel matchState={externalMatchState} onQuery={onQuery} />
+          </PaneFocusProvider>
+        </PaneProvider>
+      );
+    }
+
+    act(() => {
+      root?.render(<Harness />);
+    });
+    setActivePaneFindPaneId(leftPaneInstanceId);
+
+    act(() => {
+      handlePaneFindKeyboardAction({ id: "workspace.find.open", scope: "workspace" });
+    });
+    changeInput("needle");
+
+    expect(onQuery).toHaveBeenCalledWith("needle");
+    expect(container?.textContent).toContain("Searching...");
+
+    act(() => {
+      setExternalMatchState?.({ status: "matched", current: 2, total: 4 });
+    });
+
+    expect(container?.textContent).toContain("2 / 4");
+  });
+
+  it("routes open find through the focused workspace pane without replacing pane focus", () => {
+    const left = createController({ total: 7 });
+    const right = createController({ total: 5 });
+    const leftContent = buildWorkspacePaneContentModel({
+      tab,
+      paneId: "left",
+      normalizedServerId: "server-a",
+      normalizedWorkspaceId: "workspace-a",
+      onOpenTab: vi.fn(),
+      onCloseCurrentTab: vi.fn(),
+      onRetargetCurrentTab: vi.fn(),
+      onOpenWorkspaceFile: vi.fn(),
+      onOpenImportSheet: vi.fn(),
+    });
+
+    const rightContent = buildWorkspacePaneContentModel({
+      tab,
+      paneId: "right",
+      normalizedServerId: "server-a",
+      normalizedWorkspaceId: "workspace-a",
+      onOpenTab: vi.fn(),
+      onCloseCurrentTab: vi.fn(),
+      onRetargetCurrentTab: vi.fn(),
+      onOpenWorkspaceFile: vi.fn(),
+      onOpenImportSheet: vi.fn(),
+    });
+    const focusLeft = vi.fn();
+    const focusRight = vi.fn();
+    controllers.set("server-a:workspace-a:left", left);
+    controllers.set("server-a:workspace-a:right", right);
+
+    act(() => {
+      root?.render(
+        <View>
+          <WorkspacePaneContent
+            content={leftContent}
+            isPaneFocused={false}
+            isWorkspaceFocused
+            onFocusPane={focusLeft}
+          />
+          <WorkspacePaneContent
+            content={rightContent}
+            isPaneFocused
+            isWorkspaceFocused
+            onFocusPane={focusRight}
+          />
+        </View>,
+      );
+    });
+
+    act(() => {
+      handlePaneFindKeyboardAction({ id: "workspace.find.open", scope: "workspace" });
+    });
+
+    changeInput("abc");
+    expect(container?.textContent).toContain("1 / 5");
+    expect(container?.textContent).not.toContain("1 / 7");
+    expect(focusLeft).not.toHaveBeenCalled();
+    expect(focusRight).not.toHaveBeenCalled();
+  });
+});

packages/app/src/panels/pane-find.tsx

@@ -0,0 +1,310 @@
+import { ChevronDown, ChevronUp, X } from "lucide-react-native";
+import React, { useCallback, useEffect, useMemo, useRef, useState } from "react";
+import {
+  Pressable,
+  Text,
+  TextInput,
+  View,
+  type NativeSyntheticEvent,
+  type TextInputKeyPressEventData,
+} from "react-native";
+import { StyleSheet, useUnistyles } from "react-native-unistyles";
+import { useStableEvent } from "@/hooks/use-stable-event";
+import { usePaneContext } from "@/panels/pane-context";
+import { paneFindRegistry } from "@/panels/pane-find-registry";
+
+export type PaneFindMatchState =
+  | { status: "empty" }
+  | { status: "pending" }
+  | { status: "no-match" }
+  | { status: "matched"; current: number; total: number };
+
+export type PaneFindCommandResult = PaneFindMatchState | void;
+
+export interface UsePaneFindInput {
+  matchState?: PaneFindMatchState;
+  onQuery(query: string): PaneFindCommandResult;
+  onNext(): PaneFindCommandResult;
+  onPrev(): PaneFindCommandResult;
+  onClose(): void;
+}
+
+export interface FindBarProps {
+  query: string;
+  matchState: PaneFindMatchState;
+  focusToken: number;
+  onQueryChange(query: string): void;
+  onNext(): void;
+  onPrev(): void;
+  onClose(): void;
+}
+
+export interface UsePaneFindResult {
+  isOpen: boolean;
+  findBarProps: FindBarProps;
+}
+
+export function usePaneFind(input: UsePaneFindInput): UsePaneFindResult {
+  const { paneInstanceId } = usePaneContext();
+  const [isOpen, setIsOpen] = useState(false);
+  const [query, setQuery] = useState("");
+  const [matchState, setMatchState] = useState<PaneFindMatchState>({ status: "empty" });
+  const [focusToken, setFocusToken] = useState(0);
+  const onQuery = useStableEvent(input.onQuery);
+  const onNextInput = useStableEvent(input.onNext);
+  const onPrevInput = useStableEvent(input.onPrev);
+  const onCloseInput = useStableEvent(input.onClose);
+  const isOpenRef = useRef(false);
+  const queryRef = useRef("");
+
+  useEffect(() => {
+    isOpenRef.current = isOpen;
+  }, [isOpen]);
+
+  useEffect(() => {
+    queryRef.current = query;
+  }, [query]);
+
+  useEffect(() => {
+    if (!isOpen || !input.matchState) {
+      return;
+    }
+    setMatchState(input.matchState);
+  }, [input.matchState, isOpen]);
+
+  const openFind = useCallback(() => {
+    isOpenRef.current = true;
+    setIsOpen(true);
+    setFocusToken((current) => current + 1);
+    return true;
+  }, []);
+
+  const closeFind = useCallback(() => {
+    if (!isOpenRef.current && queryRef.current.length === 0) {
+      return false;
+    }
+    isOpenRef.current = false;
+    queryRef.current = "";
+    setIsOpen(false);
+    setQuery("");
+    setMatchState({ status: "empty" });
+    onCloseInput();
+    return true;
+  }, [onCloseInput]);
+
+  useEffect(() => {
+    if (!paneInstanceId) {
+      return;
+    }
+    return paneFindRegistry.register({
+      paneId: paneInstanceId,
+      controller: { openFind, closeFind },
+    });
+  }, [closeFind, openFind, paneInstanceId]);
+
+  useEffect(() => {
+    return () => {
+      closeFind();
+    };
+  }, [closeFind]);
+
+  const handleQueryChange = useCallback(
+    (nextQuery: string) => {
+      queryRef.current = nextQuery;
+      setQuery(nextQuery);
+      const nextState = onQuery(nextQuery);
+      setMatchState(
+        nextQuery.length === 0 ? { status: "empty" } : (nextState ?? { status: "pending" }),
+      );
+    },
+    [onQuery],
+  );
+
+  const handleNext = useCallback(() => {
+    if (queryRef.current.length === 0) {
+      return;
+    }
+    setMatchState(onNextInput() ?? { status: "pending" });
+  }, [onNextInput]);
+
+  const handlePrev = useCallback(() => {
+    if (queryRef.current.length === 0) {
+      return;
+    }
+    setMatchState(onPrevInput() ?? { status: "pending" });
+  }, [onPrevInput]);
+
+  const handleClose = useCallback(() => {
+    closeFind();
+  }, [closeFind]);
+
+  const findBarProps = useMemo(
+    () => ({
+      query,
+      matchState,
+      focusToken,
+      onQueryChange: handleQueryChange,
+      onNext: handleNext,
+      onPrev: handlePrev,
+      onClose: handleClose,
+    }),
+    [focusToken, handleClose, handleNext, handlePrev, handleQueryChange, matchState, query],
+  );
+
+  return { isOpen, findBarProps };
+}
+
+export function FindBar({
+  query,
+  matchState,
+  focusToken,
+  onQueryChange,
+  onNext,
+  onPrev,
+  onClose,
+}: FindBarProps) {
+  const inputRef = useRef<TextInput>(null);
+  const { theme } = useUnistyles();
+  const iconColor = theme.colors?.foregroundMuted ?? "#71717a";
+
+  useEffect(() => {
+    inputRef.current?.focus();
+  }, [focusToken]);
+
+  const canNavigate = matchState.status === "matched";
+  const handleKeyPress = useCallback(
+    (event: NativeSyntheticEvent<TextInputKeyPressEventData & { shiftKey?: boolean }>) => {
+      if (event.nativeEvent.key === "Escape") {
+        event.preventDefault?.();
+        onClose();
+        return;
+      }
+      if (event.nativeEvent.key !== "Enter") {
+        return;
+      }
+      event.preventDefault?.();
+      if (!canNavigate) {
+        return;
+      }
+      if (event.nativeEvent.shiftKey) {
+        onPrev();
+        return;
+      }
+      onNext();
+    },
+    [canNavigate, onClose, onNext, onPrev],
+  );
+
+  const counterText = formatMatchState(matchState);
+  const controlDisabled = !canNavigate;
+  const matchButtonStyle = useMemo(
+    () => [styles.iconButton, controlDisabled && styles.iconButtonDisabled],
+    [controlDisabled],
+  );
+
+  return (
+    <View style={styles.container} testID="pane-find-bar">
+      <Text style={styles.label}>Find</Text>
+      <TextInput
+        ref={inputRef}
+        testID="pane-find-input"
+        value={query}
+        onChangeText={onQueryChange}
+        onKeyPress={handleKeyPress}
+        autoCapitalize="none"
+        autoCorrect={false}
+        placeholder="Search"
+        placeholderTextColor={theme.colors?.foregroundMuted ?? "#71717a"}
+        style={styles.input}
+      />
+      <Text style={styles.counter}>{counterText}</Text>
+      <Pressable
+        accessibilityLabel="Previous match"
+        disabled={controlDisabled}
+        onPress={onPrev}
+        style={matchButtonStyle}
+        testID="pane-find-prev"
+      >
+        <ChevronUp size={14} color={iconColor} />
+      </Pressable>
+      <Pressable
+        accessibilityLabel="Next match"
+        disabled={controlDisabled}
+        onPress={onNext}
+        style={matchButtonStyle}
+        testID="pane-find-next"
+      >
+        <ChevronDown size={14} color={iconColor} />
+      </Pressable>
+      <Pressable
+        accessibilityLabel="Close find"
+        onPress={onClose}
+        style={styles.iconButton}
+        testID="pane-find-close"
+      >
+        <X size={14} color={iconColor} />
+      </Pressable>
+    </View>
+  );
+}
+
+function formatMatchState(matchState: PaneFindMatchState): string {
+  if (matchState.status === "matched") {
+    return `${matchState.current} / ${matchState.total}`;
+  }
+  if (matchState.status === "no-match") {
+    return "No matches";
+  }
+  if (matchState.status === "pending") {
+    return "Searching...";
+  }
+  return "0 / 0";
+}
+
+const styles = StyleSheet.create((theme) => ({
+  container: {
+    minHeight: 36,
+    flexDirection: "row",
+    alignItems: "center",
+    gap: 6,
+    borderBottomWidth: StyleSheet.hairlineWidth,
+    borderBottomColor: theme.colors.border,
+    backgroundColor: theme.colors.surface1,
+    paddingHorizontal: 8,
+    paddingVertical: 4,
+  },
+  label: {
+    color: theme.colors.foregroundMuted,
+    fontSize: 12,
+    fontWeight: "600",
+  },
+  input: {
+    flex: 1,
+    minWidth: 120,
+    height: 26,
+    borderWidth: StyleSheet.hairlineWidth,
+    borderColor: theme.colors.border,
+    borderRadius: 6,
+    color: theme.colors.foreground,
+    backgroundColor: theme.colors.surface0,
+    fontSize: 13,
+    paddingHorizontal: 8,
+    paddingVertical: 3,
+  },
+  counter: {
+    minWidth: 64,
+    color: theme.colors.foregroundMuted,
+    fontSize: 12,
+    textAlign: "right",
+  },
+  iconButton: {
+    width: 26,
+    height: 26,
+    alignItems: "center",
+    justifyContent: "center",
+    borderRadius: 6,
+  },
+  iconButtonDisabled: {
+    opacity: 0.4,
+  },
+}));

packages/app/src/screens/workspace/workspace-pane-content.test.tsx

@@ -113,6 +113,7 @@ describe("WorkspacePaneContent", () => {
       isInteractive: false,
       focusPane: expect.any(Function),
     });
+    expect(snapshots[0]?.paneContextValue.paneInstanceId).toBeNull();
     expect(snapshots[1]?.focus).toEqual({
       isWorkspaceFocused: true,
       isPaneFocused: true,

packages/app/src/screens/workspace/workspace-pane-content.tsx

@@ -1,4 +1,4 @@
-import React, { useMemo, type ComponentType } from "react";
+import React, { useEffect, useMemo, type ComponentType } from "react";
 import invariant from "tiny-invariant";
 import {
   createPaneFocusContextValue,
@@ -10,6 +10,11 @@ import { getPanelRegistration } from "@/panels/panel-registry";
 import { ensurePanelsRegistered } from "@/panels/register-panels";
 import type { WorkspaceTabDescriptor } from "@/screens/workspace/workspace-tabs-types";
 import type { WorkspaceFileOpenRequest } from "@/workspace/file-open";
+import {
+  clearActivePaneFindPaneId,
+  createPaneFindPaneId,
+  setActivePaneFindPaneId,
+} from "@/panels/pane-find-registry";
 
 export interface WorkspacePaneContentModel {
   key: string;
@@ -19,6 +24,7 @@ export interface WorkspacePaneContentModel {
 
 export interface BuildWorkspacePaneContentModelInput {
   tab: WorkspaceTabDescriptor;
+  paneId?: string | null;
   normalizedServerId: string;
   normalizedWorkspaceId: string;
   onOpenTab: (target: WorkspaceTabDescriptor["target"]) => void;
@@ -30,6 +36,7 @@ export interface BuildWorkspacePaneContentModelInput {
 
 export function buildWorkspacePaneContentModel({
   tab,
+  paneId,
   normalizedServerId,
   normalizedWorkspaceId,
   onOpenTab,
@@ -41,12 +48,20 @@ export function buildWorkspacePaneContentModel({
   ensurePanelsRegistered();
   const registration = getPanelRegistration(tab.kind);
   invariant(registration, `No panel registration for kind: ${tab.kind}`);
+  const paneInstanceId = paneId
+    ? createPaneFindPaneId({
+        serverId: normalizedServerId,
+        workspaceId: normalizedWorkspaceId,
+        paneId,
+      })
+    : null;
   return {
     key: `${normalizedServerId}:${normalizedWorkspaceId}:${tab.tabId}`,
     Component: registration.component,
     paneContextValue: {
       serverId: normalizedServerId,
       workspaceId: normalizedWorkspaceId,
+      paneInstanceId,
       tabId: tab.tabId,
       target: tab.target,
       openTab: onOpenTab,
@@ -81,6 +96,16 @@ export function WorkspacePaneContent({
       }),
     [isPaneFocused, isWorkspaceFocused, onFocusPane],
   );
+  useEffect(() => {
+    if (!paneContextValue.paneInstanceId || !isWorkspaceFocused || !isPaneFocused) {
+      return;
+    }
+    const paneInstanceId = paneContextValue.paneInstanceId;
+    setActivePaneFindPaneId(paneInstanceId);
+    return () => {
+      clearActivePaneFindPaneId(paneInstanceId);
+    };
+  }, [isPaneFocused, isWorkspaceFocused, paneContextValue.paneInstanceId]);
 
   return (
     <PaneProvider value={paneContextValue}>

packages/app/src/screens/workspace/workspace-screen.tsx

@@ -2827,6 +2827,7 @@ function WorkspaceScreenContent({
     }) =>
       buildWorkspacePaneContentModel({
         tab: input.tab,
+        paneId: input.paneId,
         normalizedServerId,
         normalizedWorkspaceId,
         onOpenTab: (target) => {

packages/app/src/terminal/runtime/terminal-emulator-runtime.test.ts

@@ -26,6 +26,16 @@ vi.mock("@xterm/addon-ligatures/lib/addon-ligatures.mjs", () => ({
 
 vi.mock("@xterm/addon-search", () => ({
   SearchAddon: class SearchAddon {
+    findNext(): boolean {
+      return false;
+    }
+    findPrevious(): boolean {
+      return false;
+    }
+    clearDecorations(): void {}
+    onDidChangeResults(): { dispose: () => void } {
+      return { dispose: () => {} };
+    }
     dispose(): void {}
   },
 }));
@@ -91,6 +101,15 @@ interface StubTerminal {
   cols?: number;
 }
 
+interface StubSearchAddon {
+  findNext: (term: string, options?: unknown) => boolean;
+  findPrevious: (term: string, options?: unknown) => boolean;
+  clearDecorations: () => void;
+  onDidChangeResults: (listener: (event: { resultIndex: number; resultCount: number }) => void) => {
+    dispose: () => void;
+  };
+}
+
 function createRuntimeWithTerminal(): {
   runtime: TerminalEmulatorRuntime;
   terminal: StubTerminal & {
@@ -145,6 +164,55 @@ function decodeTerminalOutput(data: string | Uint8Array): string {
   return new TextDecoder().decode(data);
 }
 
+function createRuntimeWithSearchAddon(input?: {
+  findNextResult?: boolean;
+  findPreviousResult?: boolean;
+}): {
+  runtime: TerminalEmulatorRuntime;
+  searchAddon: StubSearchAddon;
+  calls: {
+    findNext: Array<{ term: string; options: unknown }>;
+    findPrevious: Array<{ term: string; options: unknown }>;
+    clearDecorations: number;
+    subscribedListeners: Array<(event: { resultIndex: number; resultCount: number }) => void>;
+    disposeSubscription: number;
+  };
+} {
+  const runtime = new TerminalEmulatorRuntime();
+  const calls = {
+    findNext: [] as Array<{ term: string; options: unknown }>,
+    findPrevious: [] as Array<{ term: string; options: unknown }>,
+    clearDecorations: 0,
+    subscribedListeners: [] as Array<(event: { resultIndex: number; resultCount: number }) => void>,
+    disposeSubscription: 0,
+  };
+  const searchAddon: StubSearchAddon = {
+    findNext: (term, options) => {
+      calls.findNext.push({ term, options });
+      return input?.findNextResult ?? true;
+    },
+    findPrevious: (term, options) => {
+      calls.findPrevious.push({ term, options });
+      return input?.findPreviousResult ?? true;
+    },
+    clearDecorations: () => {
+      calls.clearDecorations += 1;
+    },
+    onDidChangeResults: (listener) => {
+      calls.subscribedListeners.push(listener);
+      return {
+        dispose: () => {
+          calls.disposeSubscription += 1;
+        },
+      };
+    },
+  };
+
+  (runtime as unknown as { searchAddon: StubSearchAddon }).searchAddon = searchAddon;
+
+  return { runtime, searchAddon, calls };
+}
+
 describe("terminal-emulator-runtime", () => {
   const originalWindow = (globalThis as { window?: unknown }).window;
 
@@ -418,4 +486,71 @@ describe("terminal-emulator-runtime", () => {
 
     expect(fitAndEmitResize).not.toHaveBeenCalled();
   });
+
+  it("delegates find navigation and clearing to the stored xterm search addon", () => {
+    const { runtime, calls } = createRuntimeWithSearchAddon({
+      findNextResult: true,
+      findPreviousResult: false,
+    });
+
+    expect(runtime.findNext({ query: "needle" })).toBe(true);
+    expect(runtime.findPrevious({ query: "needle" })).toBe(false);
+    runtime.clearFindDecorations();
+
+    expect(calls.findNext).toEqual([
+      {
+        term: "needle",
+        options: {
+          caseSensitive: false,
+          decorations: {
+            matchBackground: "#facc15",
+            matchOverviewRuler: "#facc15",
+            activeMatchBackground: "#38bdf8",
+            activeMatchColorOverviewRuler: "#38bdf8",
+          },
+        },
+      },
+    ]);
+    expect(calls.findPrevious).toEqual([
+      {
+        term: "needle",
+        options: {
+          caseSensitive: false,
+          decorations: {
+            matchBackground: "#facc15",
+            matchOverviewRuler: "#facc15",
+            activeMatchBackground: "#38bdf8",
+            activeMatchColorOverviewRuler: "#38bdf8",
+          },
+        },
+      },
+    ]);
+    expect(calls.clearDecorations).toBe(1);
+  });
+
+  it("forwards xterm search result changes and disposes the subscription", () => {
+    const { runtime, calls } = createRuntimeWithSearchAddon();
+    const events: Array<{ resultIndex: number; resultCount: number }> = [];
+
+    const unsubscribe = runtime.onFindResultsChanged((event) => {
+      events.push(event);
+    });
+    calls.subscribedListeners[0]?.({ resultIndex: 2, resultCount: 5 });
+    unsubscribe();
+
+    expect(events).toEqual([{ resultIndex: 2, resultCount: 5 }]);
+    expect(calls.disposeSubscription).toBe(1);
+  });
+
+  it("keeps find methods inert before the search addon is mounted", () => {
+    const runtime = new TerminalEmulatorRuntime();
+    const listener = vi.fn();
+
+    expect(runtime.findNext({ query: "needle" })).toBe(false);
+    expect(runtime.findPrevious({ query: "needle" })).toBe(false);
+    runtime.clearFindDecorations();
+    runtime.onFindResultsChanged(listener)();
+
+    expect(listener).not.toHaveBeenCalled();
+  });
 });

packages/app/src/terminal/runtime/terminal-emulator-runtime.ts

@@ -2,11 +2,12 @@ import { ClipboardAddon } from "@xterm/addon-clipboard";
 import { FitAddon } from "@xterm/addon-fit";
 import { ImageAddon } from "@xterm/addon-image";
 import { SearchAddon } from "@xterm/addon-search";
+import type { ISearchOptions, ISearchResultChangeEvent } from "@xterm/addon-search";
 import { Unicode11Addon } from "@xterm/addon-unicode11";
 import { WebLinksAddon } from "@xterm/addon-web-links";
 import { WebglAddon } from "@xterm/addon-webgl";
 import { LigaturesAddon } from "@xterm/addon-ligatures/lib/addon-ligatures.mjs";
-import { Terminal, type ITheme } from "@xterm/xterm";
+import { Terminal, type IDisposable, type ITheme } from "@xterm/xterm";
 import type { TerminalState } from "@getpaseo/protocol/messages";
 import {
   type TerminalInputModeState,
@@ -61,6 +62,12 @@ export interface TerminalEmulatorRuntimeCallbacks {
   onInputModeChange?: (state: TerminalInputModeState) => Promise<void> | void;
 }
 
+export type TerminalFindResultChangeEvent = ISearchResultChangeEvent;
+
+export interface TerminalFindQueryInput {
+  query: string;
+}
+
 interface TerminalEmulatorRuntimeDisposables {
   disposeInput: () => void;
   disconnectResizeObserver: () => void;
@@ -128,6 +135,16 @@ function prependTerminalOutput(
   return output;
 }
 
+const TERMINAL_FIND_SEARCH_OPTIONS: ISearchOptions = {
+  caseSensitive: false,
+  decorations: {
+    matchBackground: "#facc15",
+    matchOverviewRuler: "#facc15",
+    activeMatchBackground: "#38bdf8",
+    activeMatchColorOverviewRuler: "#38bdf8",
+  },
+};
+
 const DEFAULT_TERMINAL_FONT_FAMILY = [
   // Prefer common developer fonts, with Nerd Font variants for prompt/TUI glyphs.
   "JetBrains Mono",
@@ -164,6 +181,7 @@ export class TerminalEmulatorRuntime {
   };
   private terminal: Terminal | null = null;
   private fitAddon: FitAddon | null = null;
+  private searchAddon: SearchAddon | null = null;
   private fitAndEmitResize: ((force: boolean) => void) | null = null;
   private lastSize: { rows: number; cols: number } | null = null;
   private cleanup: (() => void) | null = null;
@@ -223,6 +241,7 @@ export class TerminalEmulatorRuntime {
       theme: withOverviewRulerBorderHidden(input.theme),
     });
     const fitAddon = new FitAddon();
+    const searchAddon = new SearchAddon({ highlightLimit: 20_000 });
     const unicode11Addon = new Unicode11Addon();
     let webglAddon: WebglAddon | null = null;
     let imageAddon: ImageAddon | null = null;
@@ -245,7 +264,7 @@ export class TerminalEmulatorRuntime {
         },
       }),
     );
-    terminal.loadAddon(new SearchAddon({ highlightLimit: 20_000 }));
+    terminal.loadAddon(searchAddon);
     terminal.loadAddon(new ClipboardAddon());
     try {
       terminal.loadAddon(new LigaturesAddon());
@@ -334,6 +353,7 @@ export class TerminalEmulatorRuntime {
 
     this.terminal = terminal;
     this.fitAddon = fitAddon;
+    this.searchAddon = searchAddon;
     window.__paseoTerminal = terminal;
 
     const fitAndEmitResize = (force: boolean): void => {
@@ -687,6 +707,25 @@ export class TerminalEmulatorRuntime {
     this.terminal?.blur();
   }
 
+  findNext(input: TerminalFindQueryInput): boolean {
+    return this.searchAddon?.findNext(input.query, TERMINAL_FIND_SEARCH_OPTIONS) ?? false;
+  }
+
+  findPrevious(input: TerminalFindQueryInput): boolean {
+    return this.searchAddon?.findPrevious(input.query, TERMINAL_FIND_SEARCH_OPTIONS) ?? false;
+  }
+
+  clearFindDecorations(): void {
+    this.searchAddon?.clearDecorations();
+  }
+
+  onFindResultsChanged(listener: (event: TerminalFindResultChangeEvent) => void): () => void {
+    const disposable: IDisposable | undefined = this.searchAddon?.onDidChangeResults(listener);
+    return () => {
+      disposable?.dispose();
+    };
+  }
+
   private refreshVisibleRows(): void {
     const terminal = this.terminal;
     if (!terminal || terminal.rows <= 0) {
@@ -739,6 +778,7 @@ export class TerminalEmulatorRuntime {
     }
     this.terminal = null;
     this.fitAddon = null;
+    this.searchAddon = null;
     this.fitAndEmitResize = null;
     this.lastSize = null;
     this.themeBackgroundElements = [];

packages/desktop/src/features/browser-webviews.ts

@@ -1,16 +1,71 @@
 import { webContents as allWebContents, type WebContents } from "electron";
 
+export const BROWSER_FOUND_IN_PAGE_EVENT = "paseo:event:browser-found-in-page";
+
 const browserIdsByWebContentsId = new Map<number, string>();
+const webContentsIdsByBrowserId = new Map<string, number>();
+const ownerWebContentsIdsByBrowserId = new Map<string, number>();
+const activeFindBrowserIdsByOwnerWebContentsId = new Map<number, string>();
+const ownerFoundInPageListenerWebContentsIds = new Set<number>();
 let workspaceActiveBrowserId: string | null = null;
 
 export function listRegisteredPaseoBrowserIds(): string[] {
   return Array.from(new Set(browserIdsByWebContentsId.values())).sort();
 }
 
-export function registerPaseoBrowserWebContents(contents: WebContents, browserId: string): void {
+function ensureOwnerFoundInPageListener(ownerContents: WebContents): void {
+  if (ownerFoundInPageListenerWebContentsIds.has(ownerContents.id)) {
+    return;
+  }
+  ownerFoundInPageListenerWebContentsIds.add(ownerContents.id);
+  const handleFoundInPage = (_event: Electron.Event, result: Electron.Result): void => {
+    const browserId = activeFindBrowserIdsByOwnerWebContentsId.get(ownerContents.id);
+    if (!browserId || ownerContents.isDestroyed()) {
+      return;
+    }
+    ownerContents.send(BROWSER_FOUND_IN_PAGE_EVENT, {
+      browserId,
+      requestId: result.requestId,
+      activeMatchOrdinal: result.activeMatchOrdinal,
+      matches: result.matches,
+      finalUpdate: result.finalUpdate,
+    });
+    if (result.finalUpdate) {
+      activeFindBrowserIdsByOwnerWebContentsId.delete(ownerContents.id);
+    }
+  };
+  ownerContents.on("found-in-page", handleFoundInPage);
+  ownerContents.once("destroyed", () => {
+    ownerContents.removeListener("found-in-page", handleFoundInPage);
+    ownerFoundInPageListenerWebContentsIds.delete(ownerContents.id);
+    activeFindBrowserIdsByOwnerWebContentsId.delete(ownerContents.id);
+  });
+}
+
+export function registerPaseoBrowserWebContents(
+  contents: WebContents,
+  browserId: string,
+  ownerContents: WebContents,
+): void {
   browserIdsByWebContentsId.set(contents.id, browserId);
+  webContentsIdsByBrowserId.set(browserId, contents.id);
+  if (!ownerContents.isDestroyed()) {
+    ownerWebContentsIdsByBrowserId.set(browserId, ownerContents.id);
+    ensureOwnerFoundInPageListener(ownerContents);
+  }
   contents.once("destroyed", () => {
     browserIdsByWebContentsId.delete(contents.id);
+    if (webContentsIdsByBrowserId.get(browserId) === contents.id) {
+      webContentsIdsByBrowserId.delete(browserId);
+      const ownerContentsId = ownerWebContentsIdsByBrowserId.get(browserId);
+      ownerWebContentsIdsByBrowserId.delete(browserId);
+      if (
+        ownerContentsId &&
+        activeFindBrowserIdsByOwnerWebContentsId.get(ownerContentsId) === browserId
+      ) {
+        activeFindBrowserIdsByOwnerWebContentsId.delete(ownerContentsId);
+      }
+    }
     if (workspaceActiveBrowserId === browserId) {
       workspaceActiveBrowserId = null;
     }
@@ -29,14 +84,35 @@ export function setWorkspaceActivePaseoBrowserId(browserId: string | null): void
 }
 
 export function getPaseoBrowserWebContents(browserId: string): WebContents | null {
-  for (const [contentsId, registeredBrowserId] of browserIdsByWebContentsId) {
-    if (registeredBrowserId !== browserId) continue;
-    const contents = allWebContents.fromId(contentsId);
-    if (contents && !contents.isDestroyed()) {
-      return contents;
-    }
+  const contentsId = webContentsIdsByBrowserId.get(browserId);
+  if (!contentsId) {
+    return null;
+  }
+  const contents = allWebContents.fromId(contentsId);
+  return contents && !contents.isDestroyed() ? contents : null;
+}
+
+export function setActivePaseoBrowserFind(browserId: string): void {
+  const ownerContentsId = ownerWebContentsIdsByBrowserId.get(browserId);
+  if (!ownerContentsId) {
+    return;
+  }
+  const ownerContents = allWebContents.fromId(ownerContentsId);
+  if (!ownerContents || ownerContents.isDestroyed()) {
+    return;
+  }
+  ensureOwnerFoundInPageListener(ownerContents);
+  activeFindBrowserIdsByOwnerWebContentsId.set(ownerContents.id, browserId);
+}
+
+export function clearActivePaseoBrowserFind(browserId: string): void {
+  const ownerContentsId = ownerWebContentsIdsByBrowserId.get(browserId);
+  if (!ownerContentsId) {
+    return;
+  }
+  if (activeFindBrowserIdsByOwnerWebContentsId.get(ownerContentsId) === browserId) {
+    activeFindBrowserIdsByOwnerWebContentsId.delete(ownerContentsId);
   }
-  return null;
 }
 
 export function getWorkspaceActivePaseoBrowserWebContents(): WebContents | null {

packages/desktop/src/main.ts

@@ -33,10 +33,12 @@ import {
 import { registerOpenerHandlers } from "./features/opener.js";
 import { setupApplicationMenu } from "./features/menu.js";
 import {
+  clearActivePaseoBrowserFind,
   getPaseoBrowserIdForWebContents,
   getPaseoBrowserWebContents,
   listRegisteredPaseoBrowserIds,
   registerPaseoBrowserWebContents,
+  setActivePaseoBrowserFind,
   setWorkspaceActivePaseoBrowserId,
 } from "./features/browser-webviews.js";
 import { parseOpenProjectPathFromArgv } from "./open-project-routing.js";
@@ -310,6 +312,48 @@ ipcMain.handle("paseo:browser:clear-partition", async (_event, browserId: unknow
   await session.fromPartition(partition).clearStorageData();
 });
 
+ipcMain.handle(
+  "paseo:browser:find-in-page",
+  (_event, browserId: unknown, text: unknown, options: unknown): number | null => {
+    if (typeof browserId !== "string" || typeof text !== "string" || text.length === 0) {
+      return null;
+    }
+    const contents = getPaseoBrowserWebContents(browserId);
+    if (!contents) {
+      return null;
+    }
+    setActivePaseoBrowserFind(browserId);
+    const inputOptions =
+      options && typeof options === "object"
+        ? (options as { forward?: unknown; findNext?: unknown; matchCase?: unknown })
+        : {};
+    return contents.findInPage(text, {
+      forward: inputOptions.forward !== false,
+      findNext: inputOptions.findNext === true,
+      matchCase: inputOptions.matchCase === true,
+    });
+  },
+);
+
+ipcMain.handle(
+  "paseo:browser:stop-find-in-page",
+  (_event, browserId: unknown, action: unknown): null => {
+    if (typeof browserId !== "string") {
+      return null;
+    }
+    if (
+      action !== "clearSelection" &&
+      action !== "keepSelection" &&
+      action !== "activateSelection"
+    ) {
+      return null;
+    }
+    getPaseoBrowserWebContents(browserId)?.stopFindInPage(action);
+    clearActivePaseoBrowserFind(browserId);
+    return null;
+  },
+);
+
 protocol.registerSchemesAsPrivileged([
   { scheme: APP_SCHEME, privileges: { standard: true, secure: true, supportFetchAPI: true } },
 ]);
@@ -431,7 +475,7 @@ async function createMainWindow(): Promise<void> {
   mainWindow.webContents.on("did-attach-webview", (_event, contents) => {
     const browserId = pendingBrowserWebviewIds.shift() ?? null;
     if (browserId) {
-      registerPaseoBrowserWebContents(contents, browserId);
+      registerPaseoBrowserWebContents(contents, browserId, mainWindow.webContents);
       log.info("[browser-webview] registered", {
         browserId,
         webContentsId: contents.id,

packages/desktop/src/preload.ts

@@ -1,6 +1,14 @@
 import { contextBridge, ipcRenderer, webUtils } from "electron";
 
 type EventHandler = (payload: unknown) => void;
+type BrowserFindAction = "clearSelection" | "keepSelection" | "activateSelection";
+
+interface BrowserFoundInPageResult {
+  requestId: number;
+  activeMatchOrdinal: number;
+  matches: number;
+  finalUpdate: boolean;
+}
 
 contextBridge.exposeInMainWorld("paseoDesktop", {
   platform: process.platform,
@@ -69,5 +77,31 @@ contextBridge.exposeInMainWorld("paseoDesktop", {
       ipcRenderer.invoke("paseo:browser:open-devtools", browserId),
     clearPartition: (browserId: string) =>
       ipcRenderer.invoke("paseo:browser:clear-partition", browserId),
+    findInPage: (
+      browserId: string,
+      text: string,
+      options?: { forward?: boolean; findNext?: boolean; matchCase?: boolean },
+    ) => ipcRenderer.invoke("paseo:browser:find-in-page", browserId, text, options),
+    stopFindInPage: (browserId: string, action: BrowserFindAction) =>
+      ipcRenderer.invoke("paseo:browser:stop-find-in-page", browserId, action),
+    onFoundInPage: (
+      browserId: string,
+      listener: (result: BrowserFoundInPageResult) => void,
+    ): (() => void) => {
+      const ipcListener = (
+        _ipcEvent: Electron.IpcRendererEvent,
+        payload: BrowserFoundInPageResult & { browserId?: unknown },
+      ) => {
+        if (payload?.browserId !== browserId) {
+          return;
+        }
+        const { browserId: _browserId, ...result } = payload;
+        listener(result);
+      };
+      ipcRenderer.on("paseo:event:browser-found-in-page", ipcListener);
+      return () => {
+        ipcRenderer.removeListener("paseo:event:browser-found-in-page", ipcListener);
+      };
+    },
   },
 });