Show inline report artifacts in chat

app/chat/[id]/page.tsx

@@ -11,6 +11,7 @@ import {
 	showChartWorkspaceAtom,
 	showDatasetWorkspaceAtom,
 	showFileWorkspaceAtom,
+	showMarkdownWorkspaceAtom,
 	vncUrlAtom,
 	workspaceChartAtom,
 	workspaceDatasetAtom,
@@ -346,6 +347,8 @@ const ChatPage = ({ params }: ChatPageProps) => {
 						filename: artifact.filename,
 					});
 				}
+			} else if (artifact.markdownContent) {
+				jotaiStore.set(showMarkdownWorkspaceAtom, artifact.markdownContent);
 			} else if (artifact.fileId && artifact.filename) {
 				jotaiStore.set(showFileWorkspaceAtom, {
 					downloadUrl: getFileDownloadUrl(

app/chat/components/assistant-message-round-artifacts.test.tsx

@@ -79,6 +79,21 @@ const assistantMessageWithMultipleCharts = {
 	],
 } as unknown as UIMessage;
 
+const assistantMessageWithInlineReport = {
+	id: "assistant-round-inline-report",
+	role: "assistant",
+	parts: [
+		{
+			type: "text",
+			text: "Report completed",
+		},
+		{
+			type: "markdown-content",
+			content: "# Analysis Report\n\nRevenue increased by 12%.",
+		},
+	],
+} as unknown as UIMessage;
+
 describe("AssistantMessage round artifact actions", () => {
 	it("renders per-category buttons with icon prefix and opens the selected artifact", () => {
 		const onSelectRoundArtifact = jest.fn();
@@ -147,4 +162,27 @@ describe("AssistantMessage round artifact actions", () => {
 
 		expect(screen.getByText("CSV 312 Bytes")).toBeInTheDocument();
 	});
+
+	it("renders inline markdown report as a round artifact action", () => {
+		const onSelectRoundArtifact = jest.fn();
+
+		render(
+			<MessageItem
+				message={assistantMessageWithInlineReport}
+				thinkingTime={null}
+				hasToolCalls={false}
+				onSelectRoundArtifact={onSelectRoundArtifact}
+			/>,
+		);
+
+		fireEvent.click(screen.getByRole("button", { name: /Report/i }));
+
+		expect(onSelectRoundArtifact).toHaveBeenCalledWith(
+			expect.objectContaining<Partial<WorkspaceRoundArtifact>>({
+				category: "report",
+				label: "Analysis Report",
+				markdownContent: "# Analysis Report\n\nRevenue increased by 12%.",
+			}),
+		);
+	});
 });

lib/chat/workspace-hydration.test.ts

@@ -325,4 +325,28 @@ describe("workspace hydration", () => {
 		);
 		expect(snapshot.view).toBe("dataset");
 	});
+
+	it("derives report artifacts from inline markdown content", () => {
+		const assistantMessage: UIMessage = {
+			id: "assistant-inline-report",
+			role: "assistant",
+			parts: [
+				{
+					type: "markdown-content",
+					content: "# Analysis Report\n\nRevenue increased by 12%.",
+				} as unknown as UIMessage["parts"][number],
+			],
+		};
+
+		const artifacts = deriveRoundArtifactsFromMessage(assistantMessage);
+
+		expect(artifacts.report).toHaveLength(1);
+		expect(artifacts.report[0]).toEqual(
+			expect.objectContaining({
+				category: "report",
+				label: "Analysis Report",
+				markdownContent: "# Analysis Report\n\nRevenue increased by 12%.",
+			}),
+		);
+	});
 });

lib/chat/workspace-hydration.ts

@@ -20,6 +20,7 @@ type WorkspaceRoundArtifact = {
 	downloadUrl?: string;
 	extension?: string;
 	chart?: Record<string, unknown>;
+	markdownContent?: string;
 	title?: string;
 	toolCallId?: string;
 };
@@ -100,6 +101,16 @@ const getFileDownloadUrl = (
 	return undefined;
 };
 
+const getMarkdownReportLabel = (content: string): string => {
+	const heading = content
+		.split("\n")
+		.map((line) => line.trim())
+		.find((line) => line.startsWith("#"));
+	const normalizedHeading = heading?.replace(/^#+\s*/, "").trim();
+
+	return normalizedHeading || "Generated report";
+};
+
 // Resolve dataset attachments from user metadata even when preview is omitted.
 const resolveDatasetAttachment = (
 	attachments: ChatAttachment[] | undefined,
@@ -284,6 +295,25 @@ const deriveRoundArtifactsFromMessage = (
 			continue;
 		}
 
+		if (
+			partRecord.type === "markdown-content" &&
+			typeof partRecord.content === "string" &&
+			partRecord.content.trim().length > 0
+		) {
+			const createdAt = nextCreatedAt();
+			const markdownContent = partRecord.content.trim();
+			const label = getMarkdownReportLabel(markdownContent);
+			pushRoundArtifact(artifacts, {
+				id: `${message.id}-report-markdown-${createdAt}`,
+				category: "report",
+				createdAt,
+				label,
+				markdownContent,
+				title: label,
+			});
+			continue;
+		}
+
 		if (
 			typeof partRecord.type !== "string" ||
 			!partRecord.type.startsWith("tool-")
@@ -539,6 +569,11 @@ const deriveWorkspaceSnapshotFromMessages = (
 			}
 
 			if (artifact.category === "report") {
+				if (artifact.markdownContent) {
+					snapshot.markdownContent = artifact.markdownContent;
+					markViewUpdated("markdown");
+					continue;
+				}
 				if (!artifact.fileId || !artifact.filename) {
 					continue;
 				}