diff --git a/ui/src/components/task-side-panel/TaskSidePanel.test.tsx b/ui/src/components/task-side-panel/TaskSidePanel.test.tsx
index 3980ce51992..ca17885d0e1 100644
--- a/ui/src/components/task-side-panel/TaskSidePanel.test.tsx
+++ b/ui/src/components/task-side-panel/TaskSidePanel.test.tsx
@@ -236,6 +236,28 @@ describe("TaskSidePanel", () => {
     expect(routeFixture.navigate).not.toHaveBeenCalled();
   });
 
+  it("preserves an explicitly linked document when artifacts arrive", async () => {
+    fixture.documents = [issueDocument("agents", "AGENTS.md")];
+    const documentDeepLink = { requestId: 1, documentKey: "agents" };
+    await render(panel({ documentDeepLink, artifactsOpenRequestId: 1 }));
+    expect(container.querySelector('[role="tab"][aria-selected="true"]')?.textContent).toContain("AGENTS.md");
+    expect(container.querySelectorAll('[data-side-panel-tab-target="artifacts"]')).toHaveLength(1);
+  });
+
+  it("handles each document link once without overriding later manual selection", async () => {
+    fixture.documents = [issueDocument("agents", "AGENTS.md")];
+    const documentDeepLink = { requestId: 1, documentKey: "agents" };
+    await render(panel({ documentDeepLink }));
+    await act(async () => container.querySelector<HTMLButtonElement>("#side-panel-tab-properties")?.click());
+    fixture.documents = [...fixture.documents, issueDocument("skill", "SKILL.md")];
+    await render(panel({ documentDeepLink: { ...documentDeepLink }, artifactsOpenRequestId: 1 }));
+    expect(container.querySelector('[role="tab"][aria-selected="true"]')?.textContent).toContain("Properties");
+    expect(container.querySelectorAll('[data-side-panel-tab-target="artifacts"]')).toHaveLength(1);
+
+    await render(panel({ documentDeepLink: { ...documentDeepLink, requestId: 2 } }));
+    expect(container.querySelector('[role="tab"][aria-selected="true"]')?.textContent).toContain("AGENTS.md");
+  });
+
   it("keeps a document selected when an artifact arrives", async () => {
     fixture.documents = [issueDocument("report", "Report")];
     const documentDeepLink = { documentKey: "report", requestId: 1 };
diff --git a/ui/src/components/task-side-panel/TaskSidePanel.tsx b/ui/src/components/task-side-panel/TaskSidePanel.tsx
index 5ffff70deb7..f5c11e0e291 100644
--- a/ui/src/components/task-side-panel/TaskSidePanel.tsx
+++ b/ui/src/components/task-side-panel/TaskSidePanel.tsx
@@ -270,6 +270,7 @@ export function TaskSidePanel({
   const userInteractedRef = useRef(restoredRef.current?.userInteracted ?? false);
   const autoPlanHandledRef = useRef(restoredRef.current?.autoPlanHandled ?? false);
   const handledArtifactsRequestRef = useRef<number | undefined>(undefined);
+  const handledDocumentRequestRef = useRef<number | undefined>(undefined);
   const initialState = useMemo(() => {
     const restored = restoredRef.current?.state;
     let tabs = restored?.tabs ?? (issue.conversationAgentId ? [taskPanelArtifactsTab()] : [taskPanelPropertiesTab()]);
@@ -356,13 +357,15 @@ export function TaskSidePanel({
   }, [controller.openTab, planDocument]);
 
   useEffect(() => {
-    if (!documentDeepLink) return;
+    if (!documentDeepLink || handledDocumentRequestRef.current === documentDeepLink.requestId) return;
     if (
       documentDeepLink.documentKey === "plan" &&
       planDocument === null
     ) return;
     const document = documents.find((candidate) => candidate.key === documentDeepLink.documentKey);
     const label = document ? documentDisplayTitle(document) : documentDeepLink.documentKey === "plan" ? "Plan" : documentDeepLink.documentKey;
+    // A refresh must not replay a link after the user selects another tab.
+    handledDocumentRequestRef.current = documentDeepLink.requestId;
     controller.openTab(taskPanelDocumentTab(documentDeepLink.documentKey, label));
   }, [controller.openTab, documentDeepLink, documents, planDocument]);
 
diff --git a/ui/src/pages/IssueDetail.test.tsx b/ui/src/pages/IssueDetail.test.tsx
index ba812bbc0a4..30294009db8 100644
--- a/ui/src/pages/IssueDetail.test.tsx
+++ b/ui/src/pages/IssueDetail.test.tsx
@@ -2162,6 +2162,29 @@ describe("IssueDetail", () => {
     });
   });
 
+  it("opens Artifacts for existing output without discarding a document deep link", async () => {
+    mockLocation.hash = "#document-agents";
+    mockIssuesApi.get.mockResolvedValue(createIssue({
+      documentSummaries: [{
+        id: "agents-doc", companyId: "company-1", issueId: "issue-1",
+        key: "agents", title: "AGENTS.md", format: "markdown",
+        latestRevisionId: "revision-1", latestRevisionNumber: 1,
+        createdByAgentId: "agent-1", createdByUserId: null,
+        updatedByAgentId: "agent-1", updatedByUserId: null,
+        lockedAt: null, lockedByAgentId: null, lockedByUserId: null,
+        createdAt: new Date(), updatedAt: new Date(),
+      }],
+    }));
+    await act(async () => {
+      root.render(<QueryClientProvider client={queryClient}><IssueDetail /></QueryClientProvider>);
+    });
+    await waitForAssertion(() => {
+      const props = mockOpenPanel.mock.calls.at(-1)?.[0]?.props.children?.props;
+      expect(props?.artifactsOpenRequestId).toBe(1);
+      expect(props?.documentDeepLink?.documentKey).toBe("agents");
+    });
+  });
+
   it.each([false, true])("registers new artifacts without opening a closed panel (mobile: %s)", async (isMobile) => {
     mockSidebarState.isMobile = isMobile;
     mockLocation.state = createIssueDetailLocationState("Inbox", "/inbox/mine", "inbox");