🤖 feat: add workflow visibility surfaces

src/browser/App.tsx

@@ -190,6 +190,9 @@ function AppInner() {
   );
 
   const [isMultiProjectWorkspaceModalOpen, setMultiProjectWorkspaceModalOpen] = useState(false);
+  const agentBrowserEnabled = useExperimentValue(EXPERIMENT_IDS.AGENT_BROWSER);
+  const dynamicWorkflowsEnabled = useExperimentValue(EXPERIMENT_IDS.DYNAMIC_WORKFLOWS);
+  const portableDesktopEnabled = useExperimentValue(EXPERIMENT_IDS.PORTABLE_DESKTOP);
   const multiProjectWorkspacesEnabled = useExperimentValue(EXPERIMENT_IDS.MULTI_PROJECT_WORKSPACES);
 
   // Left sidebar is drag-resizable (mirrors RightSidebar). Width is persisted globally;
@@ -708,6 +711,12 @@ function AppInner() {
     [handleNavigateWorkspace]
   );
 
+  const enabledRightSidebarFeatureFlags = new Set<string>();
+  if (agentBrowserEnabled) enabledRightSidebarFeatureFlags.add(EXPERIMENT_IDS.AGENT_BROWSER);
+  if (dynamicWorkflowsEnabled)
+    enabledRightSidebarFeatureFlags.add(EXPERIMENT_IDS.DYNAMIC_WORKFLOWS);
+  if (portableDesktopEnabled) enabledRightSidebarFeatureFlags.add(EXPERIMENT_IDS.PORTABLE_DESKTOP);
+
   registerParamsRef.current = {
     userProjects,
     workspaceMetadata,
@@ -717,6 +726,7 @@ function AppInner() {
     onSetThinkingLevel: setThinkingLevelFromPalette,
     getMinThinkingOverride,
     onStartWorkspaceCreation: openNewWorkspaceFromPalette,
+    enabledRightSidebarFeatureFlags,
     onStartMultiProjectWorkspaceCreation: openNewMultiProjectWorkspaceFromPalette,
     multiProjectWorkspacesEnabled,
     onArchiveMergedWorkspacesInProject: archiveMergedWorkspacesInProjectFromPalette,

src/browser/components/WorkflowIndicator/WorkflowIndicator.test.tsx

@@ -0,0 +1,127 @@
+import { afterEach, beforeEach, describe, expect, test } from "bun:test";
+import { cleanup, fireEvent, render } from "@testing-library/react";
+import { installDom } from "../../../../tests/ui/dom";
+
+import type { WorkflowDefinitionDescriptor, WorkflowRunRecord } from "@/common/types/workflow";
+import { TooltipProvider } from "@/browser/components/Tooltip/Tooltip";
+import { WorkflowIndicatorPopoverContent, WorkflowIndicatorView } from "./WorkflowIndicator";
+import {
+  groupWorkflowDefinitionsByScope,
+  summarizeWorkflowRuns,
+} from "@/browser/features/Workflows/workflowStatusPresentation";
+
+function definition(
+  name: string,
+  scope: WorkflowDefinitionDescriptor["scope"]
+): WorkflowDefinitionDescriptor {
+  return { name, scope, description: `${name} workflow`, executable: true };
+}
+
+function run(overrides: Partial<WorkflowRunRecord>): WorkflowRunRecord {
+  return {
+    id: "wfr_test",
+    workspaceId: "workspace-1",
+    definition: definition("demo", "project"),
+    definitionSource: "/repo/.mux/workflows/demo.js",
+    definitionHash: "hash",
+    args: {},
+    status: "running",
+    createdAt: "2026-01-01T00:00:00.000Z",
+    updatedAt: "2026-01-01T00:00:00.000Z",
+    events: [],
+    steps: [],
+    ...overrides,
+  };
+}
+
+describe("WorkflowIndicatorView", () => {
+  let cleanupDom: (() => void) | null = null;
+
+  beforeEach(() => {
+    cleanupDom = installDom();
+  });
+
+  afterEach(() => {
+    cleanup();
+    cleanupDom?.();
+    cleanupDom = null;
+  });
+
+  test("prioritizes problem runs over active counts", () => {
+    const definitions = [definition("project-flow", "project")];
+    const runs = [
+      run({ id: "wfr_failed", status: "failed", definition: definitions[0] }),
+      run({ id: "wfr_running", status: "running" }),
+    ];
+    const view = render(
+      <TooltipProvider>
+        <WorkflowIndicatorView
+          workspaceId="workspace-1"
+          snapshot={{
+            definitions,
+            definitionGroups: groupWorkflowDefinitionsByScope(definitions),
+            runs,
+            currentRuns: runs,
+            historyRuns: [],
+            summary: summarizeWorkflowRuns(runs),
+            isLoading: false,
+            error: null,
+          }}
+        />
+      </TooltipProvider>
+    );
+
+    const button = view.getByLabelText("1 workflow needs attention");
+    expect(button.textContent).toContain("1");
+  });
+
+  test("uses plural grammar for multiple problem runs", () => {
+    const failed = run({ id: "wfr_failed", status: "failed" });
+    const interrupted = run({ id: "wfr_interrupted", status: "interrupted" });
+    const runs = [failed, interrupted];
+    const view = render(
+      <TooltipProvider>
+        <WorkflowIndicatorView
+          workspaceId="workspace-1"
+          snapshot={{
+            definitions: [],
+            definitionGroups: groupWorkflowDefinitionsByScope([]),
+            runs,
+            currentRuns: runs,
+            historyRuns: [],
+            summary: summarizeWorkflowRuns(runs),
+            isLoading: false,
+            error: null,
+          }}
+        />
+      </TooltipProvider>
+    );
+
+    expect(view.getByLabelText("2 workflows need attention")).toBeTruthy();
+  });
+
+  test("opens the workflows tab from the popover action", () => {
+    let opened = false;
+    const view = render(
+      <WorkflowIndicatorPopoverContent
+        onOpenWorkflowsTab={() => {
+          opened = true;
+        }}
+        snapshot={{
+          definitions: [],
+          definitionGroups: groupWorkflowDefinitionsByScope([]),
+          runs: [],
+          currentRuns: [],
+          historyRuns: [],
+          summary: summarizeWorkflowRuns([]),
+          isLoading: false,
+          error: null,
+        }}
+      />
+    );
+
+    fireEvent.click(view.getByText("Open tab"));
+
+    expect(opened).toBe(true);
+  });
+});

src/browser/components/WorkflowIndicator/WorkflowIndicator.tsx

@@ -0,0 +1,151 @@
+import React from "react";
+import { Workflow } from "lucide-react";
+
+import { Popover, PopoverContent, PopoverTrigger } from "@/browser/components/Popover/Popover";
+import { Tooltip, TooltipContent, TooltipTrigger } from "@/browser/components/Tooltip/Tooltip";
+import { CUSTOM_EVENTS, createCustomEvent } from "@/common/constants/events";
+import { cn } from "@/common/lib/utils";
+
+import {
+  useWorkflowWorkspaceSnapshot,
+  type WorkflowWorkspaceSnapshot,
+} from "@/browser/features/Workflows/WorkflowStore";
+import { getWorkflowStatusPresentation } from "@/browser/features/Workflows/workflowStatusPresentation";
+
+interface WorkflowIndicatorProps {
+  workspaceId: string;
+}
+
+interface WorkflowIndicatorViewProps {
+  workspaceId: string;
+  snapshot: WorkflowWorkspaceSnapshot;
+  onOpenWorkflowsTab?: () => void;
+}
+
+export function WorkflowIndicator(props: WorkflowIndicatorProps) {
+  const snapshot = useWorkflowWorkspaceSnapshot(props.workspaceId);
+  return <WorkflowIndicatorView workspaceId={props.workspaceId} snapshot={snapshot} />;
+}
+
+export function WorkflowIndicatorView(props: WorkflowIndicatorViewProps) {
+  const [open, setOpen] = React.useState(false);
+  const problemCount = props.snapshot.summary.problemCount;
+  const activeCount = props.snapshot.summary.activeCount;
+  const hasProblems = problemCount > 0;
+  const hasActive = activeCount > 0;
+  const badgeCount = hasProblems ? problemCount : activeCount;
+  const label = hasProblems
+    ? `${problemCount} workflow${problemCount === 1 ? "" : "s"} ${problemCount === 1 ? "needs" : "need"} attention`
+    : hasActive
+      ? `${activeCount} active workflow${activeCount === 1 ? "" : "s"}`
+      : "Workflows";
+
+  const openWorkflowsTab = () => {
+    setOpen(false);
+    if (props.onOpenWorkflowsTab) {
+      props.onOpenWorkflowsTab();
+      return;
+    }
+    window.dispatchEvent(
+      createCustomEvent(CUSTOM_EVENTS.OPEN_WORKFLOWS_TAB, { workspaceId: props.workspaceId })
+    );
+  };
+
+  return (
+    <Popover open={open} onOpenChange={setOpen}>
+      <Tooltip>
+        <TooltipTrigger asChild>
+          <PopoverTrigger asChild>
+            <button
+              type="button"
+              className={cn(
+                "relative flex h-6 w-6 shrink-0 items-center justify-center rounded text-muted hover:bg-sidebar-hover hover:text-foreground max-[520px]:hidden",
+                hasProblems && "text-error",
+                !hasProblems && hasActive && "text-success"
+              )}
+              aria-label={label}
+            >
+              <Workflow className="h-3.5 w-3.5" />
+              {(hasProblems || hasActive) && (
+                <span className="bg-background counter-nums absolute -top-1 -right-1 min-w-3 rounded-full px-0.5 text-[9px] leading-3">
+                  {badgeCount}
+                </span>
+              )}
+            </button>
+          </PopoverTrigger>
+        </TooltipTrigger>
+        <TooltipContent side="bottom" align="end">
+          {label}
+        </TooltipContent>
+      </Tooltip>
+      <PopoverContent
+        side="bottom"
+        align="end"
+        className="bg-modal-bg border-separator-light w-72 overflow-visible rounded px-3 py-2 text-xs font-normal shadow-[0_2px_8px_rgba(0,0,0,0.4)]"
+      >
+        <WorkflowIndicatorPopoverContent
+          snapshot={props.snapshot}
+          onOpenWorkflowsTab={openWorkflowsTab}
+        />
+      </PopoverContent>
+    </Popover>
+  );
+}
+
+export function WorkflowIndicatorPopoverContent(props: {
+  snapshot: WorkflowWorkspaceSnapshot;
+  onOpenWorkflowsTab: () => void;
+}) {
+  return (
+    <div className="flex flex-col gap-3">
+      <div className="flex items-center justify-between gap-2">
+        <div className="text-foreground font-medium">Workflows</div>
+        <button
+          type="button"
+          className="text-accent hover:underline"
+          onClick={props.onOpenWorkflowsTab}
+        >
+          Open tab
+        </button>
+      </div>
+      <IndicatorSection title="Active and attention">
+        {props.snapshot.currentRuns.length === 0 ? (
+          <p className="text-muted">No active workflows</p>
+        ) : (
+          props.snapshot.currentRuns.slice(0, 5).map((run) => {
+            const presentation = getWorkflowStatusPresentation(run.status);
+            return (
+              <div key={run.id} className="flex items-center justify-between gap-2">
+                <span className="truncate">{run.definition.name}</span>
+                <span className="text-muted shrink-0">{presentation.label}</span>
+              </div>
+            );
+          })
+        )}
+      </IndicatorSection>
+      <IndicatorSection title="Available definitions">
+        {props.snapshot.definitions.length === 0 ? (
+          <p className="text-muted">No definitions found</p>
+        ) : (
+          <p className="text-muted">
+            {props.snapshot.definitionGroups.project.length} project ·{" "}
+            {props.snapshot.definitionGroups.global.length} global ·{" "}
+            {props.snapshot.definitionGroups["built-in"].length} built-in ·{" "}
+            {props.snapshot.definitionGroups.scratch.length} scratch
+          </p>
+        )}
+      </IndicatorSection>
+    </div>
+  );
+}
+
+function IndicatorSection(props: { title: string; children: React.ReactNode }) {
+  return (
+    <section className="flex flex-col gap-1">
+      <h3 className="text-muted text-[11px] font-semibold tracking-wide uppercase">
+        {props.title}
+      </h3>
+      {props.children}
+    </section>
+  );
+}

src/browser/components/WorkspaceMenuBar/WorkspaceMenuBar.tsx

@@ -44,6 +44,7 @@ import { PopoverError } from "../PopoverError/PopoverError";
 import { WorkspaceActionsMenuContent } from "../WorkspaceActionsMenuContent/WorkspaceActionsMenuContent";
 import { WorkspaceTerminalIcon } from "../icons/WorkspaceTerminalIcon/WorkspaceTerminalIcon";
 
+import { WorkflowIndicator } from "../WorkflowIndicator/WorkflowIndicator";
 import { SkillIndicator } from "../SkillIndicator/SkillIndicator";
 import { useAPI } from "@/browser/contexts/API";
 import { useAgent } from "@/browser/contexts/AgentContext";
@@ -95,6 +96,7 @@ export const WorkspaceMenuBar: React.FC<WorkspaceMenuBarProps> = ({
   const { disableWorkspaceAgents } = useAgent();
   const { preflightArchiveWorkspace, archiveWorkspace } = useWorkspaceActions();
   const { workspaceMetadata } = useWorkspaceContext();
+  const dynamicWorkflowsEnabled = useExperimentValue(EXPERIMENT_IDS.DYNAMIC_WORKFLOWS);
   const workspaceHeartbeatsEnabled = useExperimentValue(EXPERIMENT_IDS.WORKSPACE_HEARTBEATS);
   const linkSharingEnabled = useLinkSharingEnabled();
   const openTerminalPopout = useOpenTerminal();
@@ -683,6 +685,7 @@ export const WorkspaceMenuBar: React.FC<WorkspaceMenuBarProps> = ({
             </div>
           </PopoverContent>
         </Popover>
+        {dynamicWorkflowsEnabled && <WorkflowIndicator workspaceId={workspaceId} />}
         <SkillIndicator
           loadedSkills={loadedSkills}
           availableSkills={availableSkills}

src/browser/features/RightSidebar/RightSidebar.tsx

@@ -671,6 +671,7 @@ const RightSidebarComponent: React.FC<RightSidebarProps> = ({
   // API for reading config and managing terminal sessions.
   const apiState = useAPI();
   const api = apiState.api;
+  const workflowsExperimentEnabled = useExperimentValue(EXPERIMENT_IDS.DYNAMIC_WORKFLOWS);
   const desktopExperimentEnabled = useExperimentValue(EXPERIMENT_IDS.PORTABLE_DESKTOP);
   const browserExperimentEnabled = useExperimentValue(EXPERIMENT_IDS.AGENT_BROWSER);
   // Child task workspaces can't run goal actions — backend rejects them
@@ -983,6 +984,19 @@ const RightSidebarComponent: React.FC<RightSidebarProps> = ({
     });
   }, [initialActiveTab, setLayoutRaw, isChildWorkspaceForGoal]);
 
+  React.useEffect(() => {
+    if (workflowsExperimentEnabled) {
+      return;
+    }
+
+    setLayoutRaw((prevRaw) => {
+      const prev = parseRightSidebarLayoutState(prevRaw, initialActiveTab);
+      return collectAllTabs(prev.root).includes("workflows")
+        ? removeTabEverywhere(prev, "workflows")
+        : prev;
+    });
+  }, [initialActiveTab, setLayoutRaw, workflowsExperimentEnabled]);
+
   React.useEffect(() => {
     if (!desktopExperimentEnabled) {
       setDesktopAvailable(false);
@@ -1109,6 +1123,21 @@ const RightSidebarComponent: React.FC<RightSidebarProps> = ({
     return () => window.removeEventListener(CUSTOM_EVENTS.OPEN_GOAL_TAB, handleOpenGoalTab);
   }, [setCollapsed, setLayout, workspaceId]);
 
+  React.useEffect(() => {
+    const handleOpenWorkflowsTab = (event: Event) => {
+      const detail = (event as CustomEvent<{ workspaceId: string }>).detail;
+      if (detail?.workspaceId !== workspaceId || !workflowsExperimentEnabled) {
+        return;
+      }
+      setCollapsed(false);
+      setLayout((prev) => selectOrAddTab(prev, "workflows"));
+    };
+
+    window.addEventListener(CUSTOM_EVENTS.OPEN_WORKFLOWS_TAB, handleOpenWorkflowsTab);
+    return () =>
+      window.removeEventListener(CUSTOM_EVENTS.OPEN_WORKFLOWS_TAB, handleOpenWorkflowsTab);
+  }, [setCollapsed, setLayout, workflowsExperimentEnabled, workspaceId]);
+
   React.useEffect(() => {
     const handleOpenTouchReviewImmersive = (event: Event) => {
       const detail = (event as CustomEvent<{ workspaceId: string }>).detail;