diff --git a/site/src/pages/AgentsPage/components/ChatActionsMenuItems.tsx b/site/src/pages/AgentsPage/components/ChatActionsMenuItems.tsx
index a479115c36..84b35e4208 100644
--- a/site/src/pages/AgentsPage/components/ChatActionsMenuItems.tsx
+++ b/site/src/pages/AgentsPage/components/ChatActionsMenuItems.tsx
@@ -21,6 +21,20 @@ type SeparatorComponent =
 	| typeof DropdownMenuSeparator
 	| typeof ContextMenuSeparator;
 
+/**
+ * Archive state is root-only on the backend and cascades to children, so
+ * child chats expose no archive or unarchive actions. An archived child chat
+ * therefore has no menu actions at all; call sites use this to hide the menu
+ * trigger instead of rendering an empty menu.
+ */
+export const chatHasMenuActions = ({
+	isArchived,
+	isChildChat,
+}: {
+	isArchived: boolean;
+	isChildChat: boolean;
+}): boolean => !(isArchived && isChildChat);
+
 interface ChatActionsMenuItemsProps {
 	readonly isArchived: boolean;
 	readonly isPinned: boolean;
@@ -53,9 +67,13 @@ export const ChatActionsMenuItems: FC<ChatActionsMenuItemsProps> = ({
 	Item,
 	Separator,
 }) => {
+	const showPinAction =
+		!isArchived && !isChildChat && Boolean(onPinAgent && onUnpinAgent);
+	const showArchiveActions = !isArchived && !isChildChat;
+
 	return (
 		<>
-			{!isArchived && !isChildChat && onPinAgent && onUnpinAgent && (
+			{showPinAction && (
 				<Item onSelect={isPinned ? onUnpinAgent : onPinAgent}>
 					{isPinned ? (
 						<>
@@ -71,10 +89,12 @@ export const ChatActionsMenuItems: FC<ChatActionsMenuItemsProps> = ({
 				</Item>
 			)}
 			{isArchived ? (
-				<Item disabled={isArchiving} onSelect={onUnarchiveAgent}>
-					<ArchiveRestoreIcon className="size-3.5" />
-					Unarchive agent
-				</Item>
+				!isChildChat && (
+					<Item disabled={isArchiving} onSelect={onUnarchiveAgent}>
+						<ArchiveRestoreIcon className="size-3.5" />
+						Unarchive agent
+					</Item>
+				)
 			) : (
 				<>
 					{onOpenRenameDialog && (
@@ -83,25 +103,28 @@ export const ChatActionsMenuItems: FC<ChatActionsMenuItemsProps> = ({
 							Rename chat
 						</Item>
 					)}
-					{(onOpenRenameDialog ||
-						(!isChildChat && onPinAgent && onUnpinAgent)) && <Separator />}
-					<Item
-						className="text-content-destructive focus:text-content-destructive"
-						disabled={isArchiving}
-						onSelect={onArchiveAgent}
-					>
-						<ArchiveIcon className="size-3.5" />
-						Archive agent
-					</Item>
-					{hasWorkspace && (
-						<Item
-							className="text-content-destructive focus:text-content-destructive"
-							disabled={isArchiving}
-							onSelect={onArchiveAndDeleteWorkspace}
-						>
-							<Trash2Icon className="size-3.5" />
-							Archive & delete workspace
-						</Item>
+					{showArchiveActions && (
+						<>
+							{(onOpenRenameDialog || showPinAction) && <Separator />}
+							<Item
+								className="text-content-destructive focus:text-content-destructive"
+								disabled={isArchiving}
+								onSelect={onArchiveAgent}
+							>
+								<ArchiveIcon className="size-3.5" />
+								Archive agent
+							</Item>
+							{hasWorkspace && (
+								<Item
+									className="text-content-destructive focus:text-content-destructive"
+									disabled={isArchiving}
+									onSelect={onArchiveAndDeleteWorkspace}
+								>
+									<Trash2Icon className="size-3.5" />
+									Archive & delete workspace
+								</Item>
+							)}
+						</>
 					)}
 				</>
 			)}
diff --git a/site/src/pages/AgentsPage/components/ChatTopBar.stories.tsx b/site/src/pages/AgentsPage/components/ChatTopBar.stories.tsx
index 27db98bcf9..ad894826c5 100644
--- a/site/src/pages/AgentsPage/components/ChatTopBar.stories.tsx
+++ b/site/src/pages/AgentsPage/components/ChatTopBar.stories.tsx
@@ -307,9 +307,10 @@ export const UnpinAgentItem: Story = {
 	},
 };
 
-export const ChildChatHidesPinAction: Story = {
+export const ChildChatHidesPinAndArchiveActions: Story = {
 	args: {
 		isChildChat: true,
+		hasWorkspace: true,
 	},
 	play: async ({ canvasElement }) => {
 		const canvas = within(canvasElement);
@@ -318,11 +319,34 @@ export const ChildChatHidesPinAction: Story = {
 		await waitFor(() => {
 			const body = within(document.body);
 			expect(body.getByText("Rename chat")).toBeInTheDocument();
-			expect(body.getByText("Archive agent")).toBeInTheDocument();
 		});
 		const body = within(document.body);
 		expect(body.queryByText("Pin agent")).not.toBeInTheDocument();
 		expect(body.queryByText("Unpin agent")).not.toBeInTheDocument();
+		expect(body.queryByText("Archive agent")).not.toBeInTheDocument();
+		expect(
+			body.queryByText("Archive & delete workspace"),
+		).not.toBeInTheDocument();
+	},
+};
+
+export const ArchivedChildChatHasNoActionsMenu: Story = {
+	args: {
+		isChildChat: true,
+		isArchived: true,
+	},
+	play: async ({ canvasElement }) => {
+		const canvas = within(canvasElement);
+		await waitFor(() => {
+			expect(
+				canvas.getByText("Build authentication feature"),
+			).toBeInTheDocument();
+		});
+		// Archive state is root-only, so an archived child chat has no menu
+		// actions at all and the actions trigger is hidden entirely.
+		expect(
+			canvas.queryByLabelText("Open agent actions"),
+		).not.toBeInTheDocument();
 	},
 };
 
diff --git a/site/src/pages/AgentsPage/components/ChatTopBar.tsx b/site/src/pages/AgentsPage/components/ChatTopBar.tsx
index 44e680ead5..8f45433717 100644
--- a/site/src/pages/AgentsPage/components/ChatTopBar.tsx
+++ b/site/src/pages/AgentsPage/components/ChatTopBar.tsx
@@ -23,7 +23,10 @@ import {
 import { Popover, PopoverTrigger } from "#/components/Popover/Popover";
 import { cn } from "#/utils/cn";
 import { parsePullRequestUrl } from "../utils/pullRequest";
-import { ChatActionsMenuItems } from "./ChatActionsMenuItems";
+import {
+	ChatActionsMenuItems,
+	chatHasMenuActions,
+} from "./ChatActionsMenuItems";
 import { useEmbedContext } from "./EmbedContext";
 import { PrStateIcon } from "./GitPanel/GitPanel";
 
@@ -194,41 +197,44 @@ export const ChatTopBar: FC<ChatTopBarProps> = ({
 					</div>
 				)}
 				{/* Actions menu sits inline with the title so it tracks the title's right edge.
-				   Suppressed when there is no chat to act on (loading and not-found views). */}
-				{!isEmbedded && chatTitle && (
-					<DropdownMenu>
-						<DropdownMenuTrigger asChild>
-							<Button
-								size="icon"
-								variant="subtle"
-								className="size-7 shrink-0 text-content-secondary hover:text-content-primary"
-								aria-label="Open agent actions"
+				   Suppressed when there is no chat to act on (loading and not-found views)
+				   and when the chat has no menu actions (archived child chats). */}
+				{!isEmbedded &&
+					chatTitle &&
+					chatHasMenuActions({ isArchived, isChildChat }) && (
+						<DropdownMenu>
+							<DropdownMenuTrigger asChild>
+								<Button
+									size="icon"
+									variant="subtle"
+									className="size-7 shrink-0 text-content-secondary hover:text-content-primary"
+									aria-label="Open agent actions"
+								>
+									<EllipsisVerticalIcon className="size-4" />
+								</Button>
+							</DropdownMenuTrigger>
+							<DropdownMenuContent
+								align="start"
+								className="mobile-full-width-dropdown mobile-full-width-dropdown-top [&_[role=menuitem]]:text-[13px]"
 							>
-								<EllipsisVerticalIcon className="size-4" />
-							</Button>
-						</DropdownMenuTrigger>
-						<DropdownMenuContent
-							align="start"
-							className="mobile-full-width-dropdown mobile-full-width-dropdown-top [&_[role=menuitem]]:text-[13px]"
-						>
-							<ChatActionsMenuItems
-								isArchived={isArchived}
-								isPinned={isPinned}
-								isChildChat={isChildChat}
-								hasWorkspace={hasWorkspace}
-								isArchiving={isArchiving}
-								onPinAgent={onPinAgent}
-								onUnpinAgent={onUnpinAgent}
-								onArchiveAgent={onArchiveAgent}
-								onUnarchiveAgent={onUnarchiveAgent}
-								onArchiveAndDeleteWorkspace={onArchiveAndDeleteWorkspace}
-								onOpenRenameDialog={onOpenRenameDialog}
-								Item={DropdownMenuItem}
-								Separator={DropdownMenuSeparator}
-							/>
-						</DropdownMenuContent>
-					</DropdownMenu>
-				)}
+								<ChatActionsMenuItems
+									isArchived={isArchived}
+									isPinned={isPinned}
+									isChildChat={isChildChat}
+									hasWorkspace={hasWorkspace}
+									isArchiving={isArchiving}
+									onPinAgent={onPinAgent}
+									onUnpinAgent={onUnpinAgent}
+									onArchiveAgent={onArchiveAgent}
+									onUnarchiveAgent={onUnarchiveAgent}
+									onArchiveAndDeleteWorkspace={onArchiveAndDeleteWorkspace}
+									onOpenRenameDialog={onOpenRenameDialog}
+									Item={DropdownMenuItem}
+									Separator={DropdownMenuSeparator}
+								/>
+							</DropdownMenuContent>
+						</DropdownMenu>
+					)}
 			</div>
 			{/* PR link. On mobile: icon + number; on desktop: icon + title.
 			   Hidden on desktop when the sidebar panel is open
diff --git a/site/src/pages/AgentsPage/components/ChatsSidebar/ChatsSidebar.stories.tsx b/site/src/pages/AgentsPage/components/ChatsSidebar/ChatsSidebar.stories.tsx
index 780aa7ab13..02c75ad8cf 100644
--- a/site/src/pages/AgentsPage/components/ChatsSidebar/ChatsSidebar.stories.tsx
+++ b/site/src/pages/AgentsPage/components/ChatsSidebar/ChatsSidebar.stories.tsx
@@ -2,7 +2,14 @@ import type { Meta, StoryObj } from "@storybook/react-vite";
 import type { ComponentProps } from "react";
 import { useEffect, useState } from "react";
 import { useLocation } from "react-router";
-import { expect, fn, userEvent, waitFor, within } from "storybook/test";
+import {
+	expect,
+	fireEvent,
+	fn,
+	userEvent,
+	waitFor,
+	within,
+} from "storybook/test";
 import { reactRouterParameters } from "storybook-addon-remix-react-router";
 import { userChatProviderConfigsKey } from "#/api/queries/chats";
 import type * as TypesGen from "#/api/typesGenerated";
@@ -2037,6 +2044,125 @@ export const AgentWithWorkspaceMenuFull: Story = {
 	},
 };
 
+export const ArchivedChildChatRowHasNoActionsMenu: Story = {
+	args: {
+		chats: [
+			buildChat({
+				id: "root-archived",
+				title: "Archived root agent",
+				archived: true,
+				children: [
+					buildChat({
+						id: "child-archived",
+						title: "Archived child agent",
+						archived: true,
+						parent_chat_id: "root-archived",
+						root_chat_id: "root-archived",
+					}),
+				],
+			}),
+		],
+		sidebarFilters: { ...defaultSidebarFilters, archiveStatus: "archived" },
+	},
+	parameters: {
+		reactRouter: reactRouterParameters({
+			location: {
+				path: "/agents/child-archived",
+				pathParams: { agentId: "child-archived" },
+			},
+			routing: agentsRouting,
+		}),
+	},
+	play: async ({ canvasElement }) => {
+		const canvas = within(canvasElement);
+		await waitFor(() => {
+			expect(canvas.getByText("Archived child agent")).toBeInTheDocument();
+		});
+		// The archived root keeps its actions menu (unarchive lives there).
+		expect(
+			canvas.getByLabelText("Open actions for Archived root agent"),
+		).toBeInTheDocument();
+		// Archive state is root-only, so the archived child has no menu
+		// actions at all: its dropdown trigger is hidden entirely.
+		expect(
+			canvas.queryByLabelText("Open actions for Archived child agent"),
+		).not.toBeInTheDocument();
+
+		// The timestamp normally swaps out for the actions trigger on hover
+		// (a CSS-only group-hover swap). Without menu actions there is no
+		// trigger, so the row keeps its timestamp: ChatTreeNode only applies
+		// the hover-hidden classes when the row has menu actions. CSS :hover
+		// cannot be reliably driven in this environment, so this story
+		// asserts the timestamp is present and visible in the resting state.
+		const childRow = canvas.getByTestId("agents-tree-node-child-archived");
+		expect(within(childRow).getByText("1w")).toBeVisible();
+
+		// Positive control: right-clicking the root row opens a context menu,
+		// proving the context menu mechanism works in this story.
+		fireEvent.contextMenu(canvas.getByTestId("agents-tree-node-root-archived"));
+		await waitFor(() => {
+			expect(within(document.body).getByRole("menu")).toBeInTheDocument();
+		});
+		await userEvent.keyboard("{Escape}");
+		await waitFor(() => {
+			expect(within(document.body).queryByRole("menu")).not.toBeInTheDocument();
+		});
+
+		// Right-clicking the archived child row must not open a context menu.
+		fireEvent.contextMenu(
+			canvas.getByTestId("agents-tree-node-child-archived"),
+		);
+		expect(within(document.body).queryByRole("menu")).not.toBeInTheDocument();
+	},
+};
+
+export const ChildChatMenuHidesArchiveActions: Story = {
+	args: {
+		chats: [
+			buildChat({
+				id: "root-child-menu",
+				title: "Root agent",
+				children: [
+					buildChat({
+						id: "child-menu",
+						title: "Child agent",
+						parent_chat_id: "root-child-menu",
+						root_chat_id: "root-child-menu",
+						workspace_id: "workspace-1",
+					}),
+				],
+			}),
+		],
+	},
+	parameters: {
+		reactRouter: reactRouterParameters({
+			location: {
+				path: "/agents/child-menu",
+				pathParams: { agentId: "child-menu" },
+			},
+			routing: agentsRouting,
+		}),
+	},
+	play: async ({ canvasElement }) => {
+		const canvas = within(canvasElement);
+		await waitFor(() => {
+			expect(canvas.getByText("Child agent")).toBeInTheDocument();
+		});
+		const trigger = canvas.getByLabelText("Open actions for Child agent");
+		await userEvent.click(trigger);
+		await waitFor(() => {
+			const body = within(document.body);
+			expect(body.getByText("Rename chat")).toBeInTheDocument();
+		});
+		const body = within(document.body);
+		expect(body.queryByText("Pin agent")).not.toBeInTheDocument();
+		expect(body.queryByText("Archive agent")).not.toBeInTheDocument();
+		expect(
+			body.queryByText("Archive & delete workspace"),
+		).not.toBeInTheDocument();
+	},
+};
+
 export const PinnedChatsSection: Story = {
 	args: {
 		chats: [
diff --git a/site/src/pages/AgentsPage/components/ChatsSidebar/tree/ChatTreeNode.tsx b/site/src/pages/AgentsPage/components/ChatsSidebar/tree/ChatTreeNode.tsx
index 746beee2be..c60daa84c4 100644
--- a/site/src/pages/AgentsPage/components/ChatsSidebar/tree/ChatTreeNode.tsx
+++ b/site/src/pages/AgentsPage/components/ChatsSidebar/tree/ChatTreeNode.tsx
@@ -25,7 +25,10 @@ import {
 import { Spinner } from "#/components/Spinner/Spinner";
 import { cn } from "#/utils/cn";
 import { shortRelativeTime } from "#/utils/time";
-import { ChatActionsMenuItems } from "../../ChatActionsMenuItems";
+import {
+	ChatActionsMenuItems,
+	chatHasMenuActions,
+} from "../../ChatActionsMenuItems";
 import { asNonEmptyString } from "../../ChatConversation/blockUtils";
 import { normalizeLocationSearch } from "../locationSearch";
 import { useChatTree } from "./ChatTreeContext";
@@ -138,6 +141,10 @@ export const ChatTreeNode: FC<ChatTreeNodeProps> = ({ chat, isChildNode }) => {
 	const isArchivingThisChat = isArchiving && archivingChatId === chat.id;
 	const isExpanded = normalizedSearch ? true : (expandedById[chatID] ?? false);
 
+	const hasMenuActions = chatHasMenuActions({
+		isArchived: chat.archived,
+		isChildChat: isChildNode,
+	});
 	const sharedMenuItemProps = {
 		isArchived: chat.archived,
 		isPinned: chat.pin_order > 0,
@@ -161,7 +168,7 @@ export const ChatTreeNode: FC<ChatTreeNodeProps> = ({ chat, isChildNode }) => {
 	return (
 		<div className="flex min-w-0 flex-col gap-0.5">
 			<ContextMenu>
-				<ContextMenuTrigger asChild>
+				<ContextMenuTrigger asChild disabled={!hasMenuActions}>
 					<div
 						data-testid={`agents-tree-node-${chat.id}`}
 						className={cn(
@@ -270,7 +277,16 @@ export const ChatTreeNode: FC<ChatTreeNodeProps> = ({ chat, isChildNode }) => {
 										loading
 									/>
 								) : (
-									<span className="flex items-center justify-end text-xs text-content-secondary/50 tabular-nums [@media(hover:hover)]:group-hover:hidden group-has-[[data-state=open]]:hidden">
+									<span
+										className={cn(
+											"flex items-center justify-end text-xs text-content-secondary/50 tabular-nums",
+											// The timestamp swaps out for the actions trigger on
+											// hover; without menu actions there is no trigger, so
+											// keep the timestamp visible.
+											hasMenuActions &&
+												"[@media(hover:hover)]:group-hover:hidden group-has-[[data-state=open]]:hidden",
+										)}
+									>
 										{chat.has_unread && !isActiveChat ? (
 											<span
 												className="size-2 shrink-0 rounded-full bg-content-link pr-1"
@@ -297,28 +313,30 @@ export const ChatTreeNode: FC<ChatTreeNodeProps> = ({ chat, isChildNode }) => {
 									aria-label="Shared chat"
 								/>
 							)}
-							<DropdownMenu>
-								<DropdownMenuTrigger asChild>
-									<Button
-										size="icon"
-										variant="subtle"
-										className="absolute inset-0 flex h-6 w-7 min-w-0 justify-end rounded-none px-0 opacity-0 text-content-secondary hover:text-content-primary [@media(hover:hover)]:group-hover:opacity-100 data-[state=open]:opacity-100"
-										aria-label={`Open actions for ${chat.title}`}
+							{hasMenuActions && (
+								<DropdownMenu>
+									<DropdownMenuTrigger asChild>
+										<Button
+											size="icon"
+											variant="subtle"
+											className="absolute inset-0 flex h-6 w-7 min-w-0 justify-end rounded-none px-0 opacity-0 text-content-secondary hover:text-content-primary [@media(hover:hover)]:group-hover:opacity-100 data-[state=open]:opacity-100"
+											aria-label={`Open actions for ${chat.title}`}
+										>
+											<EllipsisVerticalIcon className="size-3.5" />
+										</Button>
+									</DropdownMenuTrigger>
+									<DropdownMenuContent
+										align="end"
+										className="[&_[role=menuitem]]:text-[13px]"
 									>
-										<EllipsisVerticalIcon className="size-3.5" />
-									</Button>
-								</DropdownMenuTrigger>
-								<DropdownMenuContent
-									align="end"
-									className="[&_[role=menuitem]]:text-[13px]"
-								>
-									<ChatActionsMenuItems
-										{...sharedMenuItemProps}
-										Item={DropdownMenuItem}
-										Separator={DropdownMenuSeparator}
-									/>
-								</DropdownMenuContent>
-							</DropdownMenu>
+										<ChatActionsMenuItems
+											{...sharedMenuItemProps}
+											Item={DropdownMenuItem}
+											Separator={DropdownMenuSeparator}
+										/>
+									</DropdownMenuContent>
+								</DropdownMenu>
+							)}
 						</div>
 					</div>
 				</ContextMenuTrigger>