diff --git a/apps/web/src/components/Sidebar.logic.test.ts b/apps/web/src/components/Sidebar.logic.test.ts
index b54ec1cb93..ac343b7288 100644
--- a/apps/web/src/components/Sidebar.logic.test.ts
+++ b/apps/web/src/components/Sidebar.logic.test.ts
@@ -1,6 +1,7 @@
-import { describe, expect, it } from "vitest";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 
 import {
+  createThreadJumpHintVisibilityController,
   getVisibleSidebarThreadIds,
   resolveAdjacentThreadId,
   getFallbackThreadIdAfterDelete,
@@ -15,6 +16,7 @@ import {
   shouldClearThreadSelectionOnMouseDown,
   sortProjectsForSidebar,
   sortThreadsForSidebar,
+  THREAD_JUMP_HINT_SHOW_DELAY_MS,
 } from "./Sidebar.logic";
 import { ProjectId, ThreadId } from "@t3tools/contracts";
 import {
@@ -52,6 +54,68 @@ describe("hasUnseenCompletion", () => {
   });
 });
 
+describe("createThreadJumpHintVisibilityController", () => {
+  beforeEach(() => {
+    vi.useFakeTimers();
+  });
+
+  afterEach(() => {
+    vi.useRealTimers();
+  });
+
+  it("delays showing jump hints until the configured delay elapses", () => {
+    const visibilityChanges: boolean[] = [];
+    const controller = createThreadJumpHintVisibilityController({
+      delayMs: THREAD_JUMP_HINT_SHOW_DELAY_MS,
+      onVisibilityChange: (visible) => {
+        visibilityChanges.push(visible);
+      },
+    });
+
+    controller.sync(true);
+    vi.advanceTimersByTime(THREAD_JUMP_HINT_SHOW_DELAY_MS - 1);
+
+    expect(visibilityChanges).toEqual([]);
+
+    vi.advanceTimersByTime(1);
+
+    expect(visibilityChanges).toEqual([true]);
+  });
+
+  it("hides immediately when the modifiers are released", () => {
+    const visibilityChanges: boolean[] = [];
+    const controller = createThreadJumpHintVisibilityController({
+      delayMs: THREAD_JUMP_HINT_SHOW_DELAY_MS,
+      onVisibilityChange: (visible) => {
+        visibilityChanges.push(visible);
+      },
+    });
+
+    controller.sync(true);
+    vi.advanceTimersByTime(THREAD_JUMP_HINT_SHOW_DELAY_MS);
+    controller.sync(false);
+
+    expect(visibilityChanges).toEqual([true, false]);
+  });
+
+  it("cancels a pending reveal when the modifier is released early", () => {
+    const visibilityChanges: boolean[] = [];
+    const controller = createThreadJumpHintVisibilityController({
+      delayMs: THREAD_JUMP_HINT_SHOW_DELAY_MS,
+      onVisibilityChange: (visible) => {
+        visibilityChanges.push(visible);
+      },
+    });
+
+    controller.sync(true);
+    vi.advanceTimersByTime(Math.floor(THREAD_JUMP_HINT_SHOW_DELAY_MS / 2));
+    controller.sync(false);
+    vi.advanceTimersByTime(THREAD_JUMP_HINT_SHOW_DELAY_MS);
+
+    expect(visibilityChanges).toEqual([]);
+  });
+});
+
 describe("shouldClearThreadSelectionOnMouseDown", () => {
   it("preserves selection for thread items", () => {
     const child = {
@@ -171,6 +235,27 @@ describe("getVisibleSidebarThreadIds", () => {
       ThreadId.makeUnsafe("thread-6"),
     ]);
   });
+
+  it("skips threads from collapsed projects whose thread panels are not shown", () => {
+    expect(
+      getVisibleSidebarThreadIds([
+        {
+          shouldShowThreadPanel: false,
+          renderedThreads: [
+            { id: ThreadId.makeUnsafe("thread-hidden-2") },
+            { id: ThreadId.makeUnsafe("thread-hidden-1") },
+          ],
+        },
+        {
+          shouldShowThreadPanel: true,
+          renderedThreads: [
+            { id: ThreadId.makeUnsafe("thread-12") },
+            { id: ThreadId.makeUnsafe("thread-11") },
+          ],
+        },
+      ]),
+    ).toEqual([ThreadId.makeUnsafe("thread-12"), ThreadId.makeUnsafe("thread-11")]);
+  });
 });
 
 describe("isContextMenuPointerDown", () => {
diff --git a/apps/web/src/components/Sidebar.logic.ts b/apps/web/src/components/Sidebar.logic.ts
index 1e0871e0d2..6350644d7f 100644
--- a/apps/web/src/components/Sidebar.logic.ts
+++ b/apps/web/src/components/Sidebar.logic.ts
@@ -1,3 +1,4 @@
+import * as React from "react";
 import type { SidebarProjectSortOrder, SidebarThreadSortOrder } from "@t3tools/contracts/settings";
 import type { Thread } from "../types";
 import { cn } from "../lib/utils";
@@ -8,6 +9,7 @@ import {
 } from "../session-logic";
 
 export const THREAD_SELECTION_SAFE_SELECTOR = "[data-thread-item], [data-thread-selection-safe]";
+export const THREAD_JUMP_HINT_SHOW_DELAY_MS = 100;
 export type SidebarNewThreadEnvMode = "local" | "worktree";
 type SidebarProject = {
   id: string;
@@ -46,6 +48,91 @@ type ThreadStatusInput = Pick<
   "interactionMode" | "latestTurn" | "lastVisitedAt" | "proposedPlans" | "session"
 >;
 
+export interface ThreadJumpHintVisibilityController {
+  sync: (shouldShow: boolean) => void;
+  dispose: () => void;
+}
+
+export function createThreadJumpHintVisibilityController(input: {
+  delayMs: number;
+  onVisibilityChange: (visible: boolean) => void;
+  setTimeoutFn?: typeof globalThis.setTimeout;
+  clearTimeoutFn?: typeof globalThis.clearTimeout;
+}): ThreadJumpHintVisibilityController {
+  const setTimeoutFn = input.setTimeoutFn ?? globalThis.setTimeout;
+  const clearTimeoutFn = input.clearTimeoutFn ?? globalThis.clearTimeout;
+  let isVisible = false;
+  let timeoutId: NodeJS.Timeout | null = null;
+
+  const clearPendingShow = () => {
+    if (timeoutId === null) {
+      return;
+    }
+    clearTimeoutFn(timeoutId);
+    timeoutId = null;
+  };
+
+  return {
+    sync: (shouldShow) => {
+      if (!shouldShow) {
+        clearPendingShow();
+        if (isVisible) {
+          isVisible = false;
+          input.onVisibilityChange(false);
+        }
+        return;
+      }
+
+      if (isVisible || timeoutId !== null) {
+        return;
+      }
+
+      timeoutId = setTimeoutFn(() => {
+        timeoutId = null;
+        isVisible = true;
+        input.onVisibilityChange(true);
+      }, input.delayMs);
+    },
+    dispose: () => {
+      clearPendingShow();
+    },
+  };
+}
+
+export function useThreadJumpHintVisibility(): {
+  showThreadJumpHints: boolean;
+  updateThreadJumpHintsVisibility: (shouldShow: boolean) => void;
+} {
+  const [showThreadJumpHints, setShowThreadJumpHints] = React.useState(false);
+  const controllerRef = React.useRef<ThreadJumpHintVisibilityController | null>(null);
+
+  React.useEffect(() => {
+    const controller = createThreadJumpHintVisibilityController({
+      delayMs: THREAD_JUMP_HINT_SHOW_DELAY_MS,
+      onVisibilityChange: (visible) => {
+        setShowThreadJumpHints(visible);
+      },
+      setTimeoutFn: window.setTimeout.bind(window),
+      clearTimeoutFn: window.clearTimeout.bind(window),
+    });
+    controllerRef.current = controller;
+
+    return () => {
+      controller.dispose();
+      controllerRef.current = null;
+    };
+  }, []);
+
+  const updateThreadJumpHintsVisibility = React.useCallback((shouldShow: boolean) => {
+    controllerRef.current?.sync(shouldShow);
+  }, []);
+
+  return {
+    showThreadJumpHints,
+    updateThreadJumpHintsVisibility,
+  };
+}
+
 export function hasUnseenCompletion(thread: ThreadStatusInput): boolean {
   if (!thread.latestTurn?.completedAt) return false;
   const completedAt = Date.parse(thread.latestTurn.completedAt);
@@ -71,13 +158,16 @@ export function resolveSidebarNewThreadEnvMode(input: {
 
 export function getVisibleSidebarThreadIds<TThreadId>(
   renderedProjects: readonly {
+    shouldShowThreadPanel?: boolean;
     renderedThreads: readonly {
       id: TThreadId;
     }[];
   }[],
 ): TThreadId[] {
   return renderedProjects.flatMap((renderedProject) =>
-    renderedProject.renderedThreads.map((thread) => thread.id),
+    renderedProject.shouldShowThreadPanel === false
+      ? []
+      : renderedProject.renderedThreads.map((thread) => thread.id),
   );
 }
 
diff --git a/apps/web/src/components/Sidebar.tsx b/apps/web/src/components/Sidebar.tsx
index 100d0e3f47..31787c7627 100644
--- a/apps/web/src/components/Sidebar.tsx
+++ b/apps/web/src/components/Sidebar.tsx
@@ -69,6 +69,7 @@ import { serverConfigQueryOptions } from "../lib/serverReactQuery";
 import { readNativeApi } from "../nativeApi";
 import { useComposerDraftStore } from "../composerDraftStore";
 import { useHandleNewThread } from "../hooks/useHandleNewThread";
+
 import { useThreadActions } from "../hooks/useThreadActions";
 import { selectThreadTerminalState, useTerminalStateStore } from "../terminalStateStore";
 import { toastManager } from "./ui/toast";
@@ -116,6 +117,7 @@ import {
   shouldClearThreadSelectionOnMouseDown,
   sortProjectsForSidebar,
   sortThreadsForSidebar,
+  useThreadJumpHintVisibility,
 } from "./Sidebar.logic";
 import { SidebarUpdatePill } from "./sidebar/SidebarUpdatePill";
 import { useCopyToClipboard } from "~/hooks/useCopyToClipboard";
@@ -361,7 +363,7 @@ export default function Sidebar() {
   const [expandedThreadListsByProject, setExpandedThreadListsByProject] = useState<
     ReadonlySet<ProjectId>
   >(() => new Set());
-  const [showThreadJumpHints, setShowThreadJumpHints] = useState(false);
+  const { showThreadJumpHints, updateThreadJumpHintsVisibility } = useThreadJumpHintVisibility();
   const renamingCommittedRef = useRef(false);
   const renamingInputRef = useRef<HTMLInputElement | null>(null);
   const dragInProgressRef = useRef(false);
@@ -1070,23 +1072,22 @@ export default function Sidebar() {
       visibleThreads,
     ],
   );
+  const visibleSidebarThreadIds = useMemo(
+    () => getVisibleSidebarThreadIds(renderedProjects),
+    [renderedProjects],
+  );
   const threadJumpCommandById = useMemo(() => {
     const mapping = new Map<ThreadId, NonNullable<ReturnType<typeof threadJumpCommandForIndex>>>();
-    let visibleThreadIndex = 0;
-
-    for (const renderedProject of renderedProjects) {
-      for (const thread of renderedProject.renderedThreads) {
-        const jumpCommand = threadJumpCommandForIndex(visibleThreadIndex);
-        if (!jumpCommand) {
-          return mapping;
-        }
-        mapping.set(thread.id, jumpCommand);
-        visibleThreadIndex += 1;
+    for (const [visibleThreadIndex, threadId] of visibleSidebarThreadIds.entries()) {
+      const jumpCommand = threadJumpCommandForIndex(visibleThreadIndex);
+      if (!jumpCommand) {
+        return mapping;
       }
+      mapping.set(threadId, jumpCommand);
     }
 
     return mapping;
-  }, [renderedProjects]);
+  }, [visibleSidebarThreadIds]);
   const threadJumpThreadIds = useMemo(
     () => [...threadJumpCommandById.keys()],
     [threadJumpCommandById],
@@ -1101,10 +1102,7 @@ export default function Sidebar() {
     }
     return mapping;
   }, [keybindings, sidebarShortcutLabelOptions, threadJumpCommandById]);
-  const orderedSidebarThreadIds = useMemo(
-    () => getVisibleSidebarThreadIds(renderedProjects),
-    [renderedProjects],
-  );
+  const orderedSidebarThreadIds = visibleSidebarThreadIds;
 
   useEffect(() => {
     const getShortcutContext = () => ({
@@ -1113,7 +1111,7 @@ export default function Sidebar() {
     });
 
     const onWindowKeyDown = (event: KeyboardEvent) => {
-      setShowThreadJumpHints(
+      updateThreadJumpHintsVisibility(
         shouldShowThreadJumpHints(event, keybindings, {
           platform,
           context: getShortcutContext(),
@@ -1161,7 +1159,7 @@ export default function Sidebar() {
     };
 
     const onWindowKeyUp = (event: KeyboardEvent) => {
-      setShowThreadJumpHints(
+      updateThreadJumpHintsVisibility(
         shouldShowThreadJumpHints(event, keybindings, {
           platform,
           context: getShortcutContext(),
@@ -1170,7 +1168,7 @@ export default function Sidebar() {
     };
 
     const onWindowBlur = () => {
-      setShowThreadJumpHints(false);
+      updateThreadJumpHintsVisibility(false);
     };
 
     window.addEventListener("keydown", onWindowKeyDown);
@@ -1190,6 +1188,7 @@ export default function Sidebar() {
     routeTerminalOpen,
     routeThreadId,
     threadJumpThreadIds,
+    updateThreadJumpHintsVisibility,
   ]);
 
   function renderProjectItem(