diff --git a/tools/ui/src/lib/components/app/chat/ChatMessages/ChatMessage/ChatMessage.svelte b/tools/ui/src/lib/components/app/chat/ChatMessages/ChatMessage/ChatMessage.svelte
index 0c9ead61e..fa2a50bc5 100644
--- a/tools/ui/src/lib/components/app/chat/ChatMessages/ChatMessage/ChatMessage.svelte
+++ b/tools/ui/src/lib/components/app/chat/ChatMessages/ChatMessage/ChatMessage.svelte
@@ -7,7 +7,12 @@
 		ChatMessageSystem,
 		ChatMessageUser
 	} from '$lib/components/app/chat';
-	import { REASONING_TAGS, ROUTES, SYSTEM_MESSAGE_PLACEHOLDER } from '$lib/constants';
+	import {
+		AGENTIC_TEXT_COPY_SEPARATOR,
+		REASONING_TAGS,
+		ROUTES,
+		SYSTEM_MESSAGE_PLACEHOLDER
+	} from '$lib/constants';
 	import { setChatMessageActionsContext, setChatMessageEditContext } from '$lib/contexts';
 	import { AgenticSectionType, AttachmentType, MessageRole } from '$lib/enums';
 	import { DatabaseService } from '$lib/services/database.service';
@@ -237,6 +242,24 @@
 	}
 
 	function handleCopy() {
+		// Agentic sessions render as a single entry anchored on the first assistant
+		// turn, whose own content is typically just the first tool call. Copy the
+		// text sections of the whole session so the clipboard matches the visible
+		// response instead of the anchor turn.
+		if (message.role === MessageRole.ASSISTANT) {
+			const sections = deriveAgenticSections(message, toolMessages, [], false);
+			const text = sections
+				.filter((section) => section.type === AgenticSectionType.TEXT)
+				.map((section) => section.content)
+				.join(AGENTIC_TEXT_COPY_SEPARATOR);
+
+			if (text) {
+				chatActions.copy(message, text);
+
+				return;
+			}
+		}
+
 		chatActions.copy(message);
 	}
 
diff --git a/tools/ui/src/lib/components/app/chat/ChatMessages/ChatMessages.svelte b/tools/ui/src/lib/components/app/chat/ChatMessages/ChatMessages.svelte
index 45b863d66..4750a9f7c 100644
--- a/tools/ui/src/lib/components/app/chat/ChatMessages/ChatMessages.svelte
+++ b/tools/ui/src/lib/components/app/chat/ChatMessages/ChatMessages.svelte
@@ -29,10 +29,10 @@
 			refreshAllMessages();
 		},
 
-		copy: async (message: DatabaseMessage) => {
+		copy: async (message: DatabaseMessage, contentOverride?: string) => {
 			const asPlainText = Boolean(currentConfig.copyTextAttachmentsAsPlainText);
 			const clipboardContent = formatMessageForClipboard(
-				message.content,
+				contentOverride ?? message.content,
 				message.extra,
 				asPlainText
 			);
diff --git a/tools/ui/src/lib/constants/agentic.constants.ts b/tools/ui/src/lib/constants/agentic.constants.ts
index e57104e8a..33fb30f1b 100644
--- a/tools/ui/src/lib/constants/agentic.constants.ts
+++ b/tools/ui/src/lib/constants/agentic.constants.ts
@@ -20,6 +20,10 @@ export const SEARCH_SUMMARY = {
 // wraps mid-paragraph.
 export const RESULT_STAT_SEPARATOR = ' - ';
 
+// Separator between the assistant text sections of a grouped agentic
+// session when they are joined for the clipboard.
+export const AGENTIC_TEXT_COPY_SEPARATOR = '\n\n';
+
 export const DEFAULT_AGENTIC_CONFIG: AgenticConfig = {
 	enabled: true,
 	maxTurns: 100
diff --git a/tools/ui/src/lib/types/chat.d.ts b/tools/ui/src/lib/types/chat.d.ts
index 274131dd4..86a868c33 100644
--- a/tools/ui/src/lib/types/chat.d.ts
+++ b/tools/ui/src/lib/types/chat.d.ts
@@ -249,7 +249,7 @@ export interface ChatMessageDeletionInfo {
  * refresh + user-action notification), passed to each ChatMessage as a prop.
  */
 export interface ChatMessageActions {
-	copy: (message: DatabaseMessage) => void;
+	copy: (message: DatabaseMessage, contentOverride?: string) => void;
 	delete: (message: DatabaseMessage) => void;
 	navigateToSibling: (siblingId: string) => void;
 	editWithBranching: (