feat(dashboards): Support dashboard editing via Seer chat session

static/app/views/dashboards/dashboardChatPanel.tsx

@@ -135,7 +135,6 @@ export function DashboardChatPanel({
         />
       )}
       <InputGroup>
-        {!hasHistory && <IconSeer size="md" />}
         <Container padding="md">
           <InputGroup.TextArea
             ref={textAreaRef}

static/app/views/dashboards/dashboardEditSeerChat.tsx

@@ -0,0 +1,50 @@
+import {useCallback} from 'react';
+
+import {useOrganization} from 'sentry/utils/useOrganization';
+
+import {DashboardChatPanel} from './dashboardChatPanel';
+import type {DashboardDetails, Widget} from './types';
+import {useSeerDashboardSession} from './useSeerDashboardSession';
+
+interface DashboardEditSeerChatProps {
+  dashboard: DashboardDetails;
+  onDashboardUpdate: (dashboard: Pick<DashboardDetails, 'title' | 'widgets'>) => void;
+}
+
+export function DashboardEditSeerChat({
+  dashboard,
+  onDashboardUpdate,
+}: DashboardEditSeerChatProps) {
+  const organization = useOrganization();
+
+  const hasFeature =
+    organization.features.includes('dashboards-edit') &&
+    organization.features.includes('dashboards-ai-generate');
+
+  const handleDashboardUpdate = useCallback(
+    (data: {title: string; widgets: Widget[]}) => {
+      onDashboardUpdate({title: data.title, widgets: data.widgets});
+    },
+    [onDashboardUpdate]
+  );
+
+  const {session, isUpdating, isError, sendFollowUpMessage} = useSeerDashboardSession({
+    dashboard: {title: dashboard.title, widgets: dashboard.widgets},
+    onDashboardUpdate: handleDashboardUpdate,
+    enabled: hasFeature,
+  });
+
+  if (!hasFeature) {
+    return null;
+  }
+
+  return (
+    <DashboardChatPanel
+      blocks={session?.blocks ?? []}
+      pendingUserInput={session?.pending_user_input}
+      onSend={sendFollowUpMessage}
+      isUpdating={isUpdating}
+      isError={isError}
+    />
+  );
+}

static/app/views/dashboards/detail.tsx

@@ -87,6 +87,7 @@ import {DiscoverQueryPageSource} from 'sentry/views/performance/utils';
 import {PrebuiltDashboardOnboardingGate} from './components/prebuiltDashboardOnboardingGate';
 import {Controls} from './controls';
 import {Dashboard} from './dashboard';
+import {DashboardEditSeerChat} from './dashboardEditSeerChat';
 import {DEFAULT_STATS_PERIOD} from './data';
 import {FiltersBar} from './filtersBar';
 import {
@@ -960,6 +961,23 @@ class DashboardDetail extends Component<Props, State> {
     });
   };
 
+  handleSeerDashboardUpdate = ({
+    title,
+    widgets,
+  }: Pick<DashboardDetails, 'title' | 'widgets'>) => {
+    this.setState(state => {
+      const dashboard = cloneDashboard(state.modifiedDashboard ?? this.props.dashboard);
+      return {
+        widgetLimitReached: widgets.length >= MAX_WIDGETS,
+        modifiedDashboard: {
+          ...dashboard,
+          widgets,
+          ...(title === undefined ? {} : {title}),
+        },
+      };
+    });
+  };
+
   handleUpdateEditStateWidgets = (widgets: Widget[]) => {
     this.setState(state => {
       const modifiedDashboard = {
@@ -1311,6 +1329,18 @@ class DashboardDetail extends Component<Props, State> {
                               dashboard={modifiedDashboard ?? dashboard}
                               onSave={this.handleSaveWidget}
                             />
+                            {dashboardState === DashboardState.EDIT &&
+                              organization.features.includes(
+                                'dashboards-ai-generate-edit'
+                              ) &&
+                              organization.features.includes(
+                                'dashboards-ai-generate'
+                              ) && (
+                                <DashboardEditSeerChat
+                                  dashboard={modifiedDashboard ?? dashboard}
+                                  onDashboardUpdate={this.handleSeerDashboardUpdate}
+                                />
+                              )}
                           </Fragment>
                         </MEPSettingProvider>
                       )}

static/app/views/dashboards/useSeerDashboardSession.spec.tsx

@@ -2,6 +2,7 @@ import {OrganizationFixture} from 'sentry-fixture/organization';
 
 import {act, renderHookWithProviders, waitFor} from 'sentry-test/reactTestingLibrary';
 
+import {DisplayType} from 'sentry/views/dashboards/types';
 import {useSeerDashboardSession} from 'sentry/views/dashboards/useSeerDashboardSession';
 
 const SEER_RUN_ID = 456;
@@ -119,4 +120,96 @@ describe('useSeerDashboardSession', () => {
       })
     );
   });
+
+  it('starts a new session via the generate endpoint when dashboard is provided without seerRunId', async () => {
+    const dashboard = {
+      title: 'My Dashboard',
+      widgets: [
+        {
+          title: 'Count',
+          displayType: DisplayType.LINE,
+          interval: '1h',
+          queries: [
+            {
+              name: '',
+              conditions: '',
+              fields: ['count()'],
+              columns: [],
+              aggregates: ['count()'],
+              orderby: '',
+            },
+          ],
+        },
+      ],
+    };
+
+    const generateMock = MockApiClient.addMockResponse({
+      url: `/organizations/${organization.slug}/dashboards/generate/`,
+      method: 'POST',
+      body: {run_id: '789'},
+    });
+
+    MockApiClient.addMockResponse({
+      url: makeSeerApiUrl(organization.slug, 789),
+      body: {
+        session: {
+          run_id: 789,
+          status: 'processing',
+          updated_at: '2026-01-01T00:00:00Z',
+          blocks: [],
+        },
+      },
+    });
+
+    const onDashboardUpdate = jest.fn();
+
+    const {result} = renderHookWithProviders(
+      () =>
+        useSeerDashboardSession({
+          dashboard,
+          onDashboardUpdate,
+        }),
+      {organization}
+    );
+
+    await act(async () => {
+      await result.current.sendFollowUpMessage('Add me another widget');
+    });
+
+    expect(generateMock).toHaveBeenCalledWith(
+      `/organizations/${organization.slug}/dashboards/generate/`,
+      expect.objectContaining({
+        method: 'POST',
+        data: {
+          prompt: 'Add me another widget',
+          current_dashboard: {
+            title: 'My Dashboard',
+            widgets: dashboard.widgets,
+          },
+        },
+      })
+    );
+
+    await waitFor(() => {
+      expect(result.current.session).toBeDefined();
+    });
+  });
+
+  it('does nothing when sendFollowUpMessage is called without seerRunId or dashboard', async () => {
+    const onDashboardUpdate = jest.fn();
+
+    const {result} = renderHookWithProviders(
+      () =>
+        useSeerDashboardSession({
+          onDashboardUpdate,
+        }),
+      {organization}
+    );
+
+    await act(async () => {
+      await result.current.sendFollowUpMessage('Add me another widget');
+    });
+
+    expect(result.current.isUpdating).toBe(false);
+  });
 });

static/app/views/dashboards/useSeerDashboardSession.tsx

@@ -3,22 +3,46 @@ import {useCallback, useEffect, useRef, useState} from 'react';
 import {addErrorMessage} from 'sentry/actionCreators/indicator';
 import {t} from 'sentry/locale';
 import {parseQueryKey} from 'sentry/utils/api/apiQueryKey';
+import {getApiUrl} from 'sentry/utils/api/getApiUrl';
 import {fetchMutation, useApiQuery, useQueryClient} from 'sentry/utils/queryClient';
 import {useOrganization} from 'sentry/utils/useOrganization';
 import type {SeerExplorerResponse} from 'sentry/views/seerExplorer/hooks/useSeerExplorer';
 import {makeSeerExplorerQueryKey} from 'sentry/views/seerExplorer/utils';
 
 import {extractDashboardFromSession, statusIsTerminal} from './createFromSeerUtils';
-import type {Widget} from './types';
+import type {DashboardDetails, Widget} from './types';
 
 const POLL_INTERVAL_MS = 500;
 const POST_COMPLETE_POLL_MS = 5000;
 
+async function startDashboardEditSession(
+  orgSlug: string,
+  message: string,
+  dashboard: Pick<DashboardDetails, 'title' | 'widgets'>
+): Promise<number> {
+  const url = getApiUrl('/organizations/$organizationIdOrSlug/dashboards/generate/', {
+    path: {organizationIdOrSlug: orgSlug},
+  });
+  const response = await fetchMutation<{run_id: string}>({
+    url,
+    method: 'POST',
+    data: {
+      prompt: message,
+      current_dashboard: {
+        title: dashboard.title,
+        widgets: dashboard.widgets,
+      },
+    },
+  });
+  return Number(response.run_id);
+}
+
 interface UseSeerDashboardSessionOptions {
   onDashboardUpdate: (data: {title: string; widgets: Widget[]}) => void;
-  seerRunId: number | null;
+  dashboard?: Pick<DashboardDetails, 'title' | 'widgets'>;
   enabled?: boolean;
   onPostCompletePollEnd?: () => void;
+  seerRunId?: number | null;
 }
 
 interface UseSeerDashboardSessionResult {
@@ -34,14 +58,18 @@ interface UseSeerDashboardSessionResult {
  * detecting terminal-state transitions, and sending follow-up messages.
  */
 export function useSeerDashboardSession({
-  seerRunId,
+  seerRunId: externalSeerRunId,
+  dashboard,
   onDashboardUpdate,
   enabled = true,
   onPostCompletePollEnd,
 }: UseSeerDashboardSessionOptions): UseSeerDashboardSessionResult {
   const organization = useOrganization();
   const queryClient = useQueryClient();
 
+  const [internalRunId, setInternalRunId] = useState<number | null>(null);
+  const seerRunId = externalSeerRunId ?? internalRunId;
+
   const [isUpdating, setIsUpdating] = useState(false);
 
   const prevSessionStatusRef = useRef<{
@@ -106,26 +134,41 @@ export function useSeerDashboardSession({
 
   const sendFollowUpMessage = useCallback(
     async (message: string) => {
-      if (!seerRunId) {
+      if (!seerRunId && !dashboard) {
         return;
       }
       setIsUpdating(true);
       completedAtRef.current = null;
+      const errorMessage = t('Failed to send message');
       try {
-        const queryKey = makeSeerExplorerQueryKey(organization.slug, seerRunId);
-        const {url} = parseQueryKey(queryKey);
-        await fetchMutation({
-          url,
-          method: 'POST',
-          data: {query: message},
-        });
-        queryClient.invalidateQueries({queryKey});
+        if (!seerRunId && dashboard) {
+          // No session exists yet and an initial dashboard is provided, start a new Seer session
+          const runId = await startDashboardEditSession(
+            organization.slug,
+            message,
+            dashboard
+          );
+          if (!runId) {
+            throw new Error('Failed to start dashboard editing session');
+          }
+          setInternalRunId(runId);
+        } else {
+          // A session exists, send the message to the existing session
+          const queryKey = makeSeerExplorerQueryKey(organization.slug, seerRunId);
+          const {url} = parseQueryKey(queryKey);
+          await fetchMutation({
+            url,
+            method: 'POST',
+            data: {query: message},
+          });
+          queryClient.invalidateQueries({queryKey});
+        }
       } catch {
         setIsUpdating(false);
-        addErrorMessage(t('Failed to send message'));
+        addErrorMessage(errorMessage);
       }
     },
-    [organization.slug, queryClient, seerRunId]
+    [organization.slug, queryClient, seerRunId, dashboard]
   );
 
   return {