feat(web): add orchestrator events widget with matrix signal visibility

apps/web/src/components/hud/HUD.tsx

@@ -55,6 +55,15 @@ const WIDGET_REGISTRY = {
     minWidth: 1,
     minHeight: 1,
   },
+  OrchestratorEventsWidget: {
+    name: "orchestrator-events",
+    displayName: "Orchestrator Events",
+    description: "Recent events and stream health for orchestration",
+    defaultWidth: 2,
+    defaultHeight: 2,
+    minWidth: 1,
+    minHeight: 1,
+  },
 } as const;
 
 type WidgetRegistryKey = keyof typeof WIDGET_REGISTRY;

apps/web/src/components/hud/WidgetRenderer.test.tsx

@@ -12,6 +12,9 @@ vi.mock("@/components/widgets", () => ({
   AgentStatusWidget: ({ id }: { id: string }): React.JSX.Element => (
     <div>Agent Status Widget {id}</div>
   ),
+  OrchestratorEventsWidget: ({ id }: { id: string }): React.JSX.Element => (
+    <div>Orchestrator Events Widget {id}</div>
+  ),
 }));
 
 function createWidgetPlacement(id: string): WidgetPlacement {
@@ -34,4 +37,11 @@ describe("WidgetRenderer", () => {
     render(<WidgetRenderer widget={createWidgetPlacement("agent-status-123")} />);
     expect(screen.getByText("Agent Status Widget agent-status-123")).toBeInTheDocument();
   });
+
+  it("renders hyphenated orchestrator-events widget IDs correctly", () => {
+    render(<WidgetRenderer widget={createWidgetPlacement("orchestrator-events-123")} />);
+    expect(
+      screen.getByText("Orchestrator Events Widget orchestrator-events-123")
+    ).toBeInTheDocument();
+  });
 });

apps/web/src/components/hud/WidgetRenderer.tsx

@@ -10,6 +10,7 @@ import {
   CalendarWidget,
   QuickCaptureWidget,
   AgentStatusWidget,
+  OrchestratorEventsWidget,
 } from "@/components/widgets";
 import type { WidgetPlacement } from "@mosaic/shared";
 
@@ -24,6 +25,7 @@ const WIDGET_COMPONENTS = {
   calendar: CalendarWidget,
   "quick-capture": QuickCaptureWidget,
   "agent-status": AgentStatusWidget,
+  "orchestrator-events": OrchestratorEventsWidget,
 };
 
 const WIDGET_CONFIG = {
@@ -43,6 +45,10 @@ const WIDGET_CONFIG = {
     displayName: "Agent Status",
     description: "View running agent sessions",
   },
+  "orchestrator-events": {
+    displayName: "Orchestrator Events",
+    description: "Recent orchestration events and stream health",
+  },
 };
 
 export function WidgetRenderer({

apps/web/src/components/widgets/OrchestratorEventsWidget.tsx

@@ -0,0 +1,159 @@
+import { useCallback, useEffect, useMemo, useState } from "react";
+import { Activity, DatabaseZap, Loader2, Wifi, WifiOff } from "lucide-react";
+import type { WidgetProps } from "@mosaic/shared";
+
+interface OrchestratorEvent {
+  type: string;
+  timestamp: string;
+  agentId?: string;
+  taskId?: string;
+  data?: Record<string, unknown>;
+}
+
+interface RecentEventsResponse {
+  events: OrchestratorEvent[];
+}
+
+function isMatrixSignal(event: OrchestratorEvent): boolean {
+  const text = JSON.stringify(event).toLowerCase();
+  return (
+    text.includes("matrix") ||
+    text.includes("room") ||
+    text.includes("channel") ||
+    text.includes("thread")
+  );
+}
+
+export function OrchestratorEventsWidget({
+  id: _id,
+  config: _config,
+}: WidgetProps): React.JSX.Element {
+  const [events, setEvents] = useState<OrchestratorEvent[]>([]);
+  const [isLoading, setIsLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+  const [streamConnected, setStreamConnected] = useState(false);
+
+  const loadRecentEvents = useCallback(async (): Promise<void> => {
+    try {
+      const response = await fetch("/api/orchestrator/events/recent?limit=25");
+      if (!response.ok) {
+        throw new Error(`Unable to load events: HTTP ${String(response.status)}`);
+      }
+      const payload = (await response.json()) as RecentEventsResponse;
+      setEvents(payload.events);
+      setError(null);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : "Unable to load events.");
+    } finally {
+      setIsLoading(false);
+    }
+  }, []);
+
+  useEffect(() => {
+    void loadRecentEvents();
+
+    const eventSource =
+      typeof EventSource !== "undefined" ? new EventSource("/api/orchestrator/events") : null;
+    if (eventSource) {
+      eventSource.onopen = (): void => {
+        setStreamConnected(true);
+      };
+      eventSource.onmessage = (): void => {
+        void loadRecentEvents();
+      };
+      eventSource.onerror = (): void => {
+        setStreamConnected(false);
+      };
+    }
+
+    const interval = setInterval(() => {
+      void loadRecentEvents();
+    }, 15000);
+
+    return (): void => {
+      clearInterval(interval);
+      eventSource?.close();
+    };
+  }, [loadRecentEvents]);
+
+  const matrixSignals = useMemo(
+    () => events.filter((event) => isMatrixSignal(event)).length,
+    [events]
+  );
+
+  if (isLoading) {
+    return (
+      <div className="flex items-center justify-center h-full">
+        <Loader2 className="w-5 h-5 text-gray-400 animate-spin" />
+        <span className="ml-2 text-gray-500 text-sm">Loading orchestrator events...</span>
+      </div>
+    );
+  }
+
+  if (error) {
+    return (
+      <div className="flex flex-col items-center justify-center h-full text-center">
+        <WifiOff className="w-5 h-5 text-amber-500 mb-2" />
+        <span className="text-sm text-amber-600">{error}</span>
+      </div>
+    );
+  }
+
+  return (
+    <div className="flex flex-col h-full space-y-3">
+      <div className="flex items-center justify-between text-xs">
+        <div className="flex items-center gap-1 text-gray-600 dark:text-gray-300">
+          {streamConnected ? (
+            <Wifi className="w-3 h-3 text-green-500" />
+          ) : (
+            <WifiOff className="w-3 h-3 text-gray-400" />
+          )}
+          <span>{streamConnected ? "Live stream connected" : "Polling mode"}</span>
+        </div>
+        <div className="flex items-center gap-1 rounded bg-blue-50 dark:bg-blue-950 px-2 py-1 text-blue-700 dark:text-blue-300">
+          <DatabaseZap className="w-3 h-3" />
+          <span>Matrix signals: {matrixSignals}</span>
+        </div>
+      </div>
+
+      <div className="flex-1 overflow-auto space-y-2">
+        {events.length === 0 ? (
+          <div className="text-center text-sm text-gray-500 py-4">
+            No recent orchestration events.
+          </div>
+        ) : (
+          events
+            .slice()
+            .reverse()
+            .map((event, index) => (
+              <div
+                key={`${event.timestamp}-${event.type}-${String(index)}`}
+                className="rounded border border-gray-200 dark:border-gray-700 bg-gray-50 dark:bg-gray-900 px-2 py-2"
+              >
+                <div className="flex items-center justify-between gap-2">
+                  <div className="flex items-center gap-2 min-w-0">
+                    <Activity className="w-3 h-3 text-blue-500 shrink-0" />
+                    <span className="text-xs font-medium text-gray-900 dark:text-gray-100 truncate">
+                      {event.type}
+                    </span>
+                    {isMatrixSignal(event) && (
+                      <span className="text-[10px] rounded bg-indigo-100 dark:bg-indigo-950 text-indigo-700 dark:text-indigo-300 px-1.5 py-0.5">
+                        matrix
+                      </span>
+                    )}
+                  </div>
+                  <span className="text-[10px] text-gray-500">
+                    {new Date(event.timestamp).toLocaleTimeString()}
+                  </span>
+                </div>
+                <div className="mt-1 text-[11px] text-gray-600 dark:text-gray-300">
+                  {event.taskId ? `Task ${event.taskId}` : "Task n/a"}
+                  {event.agentId ? ` · Agent ${event.agentId.slice(0, 8)}` : ""}
+                </div>
+              </div>
+            ))
+        )}
+      </div>
+    </div>
+  );
+}

apps/web/src/components/widgets/WidgetRegistry.tsx

@@ -10,6 +10,7 @@ import { QuickCaptureWidget } from "./QuickCaptureWidget";
 import { AgentStatusWidget } from "./AgentStatusWidget";
 import { ActiveProjectsWidget } from "./ActiveProjectsWidget";
 import { TaskProgressWidget } from "./TaskProgressWidget";
+import { OrchestratorEventsWidget } from "./OrchestratorEventsWidget";
 
 export interface WidgetDefinition {
   name: string;
@@ -95,6 +96,17 @@ export const widgetRegistry: Record<string, WidgetDefinition> = {
     minHeight: 2,
     maxWidth: 3,
   },
+  OrchestratorEventsWidget: {
+    name: "OrchestratorEventsWidget",
+    displayName: "Orchestrator Events",
+    description: "Recent orchestration events with stream/Matrix visibility",
+    component: OrchestratorEventsWidget,
+    defaultWidth: 2,
+    defaultHeight: 2,
+    minWidth: 1,
+    minHeight: 2,
+    maxWidth: 4,
+  },
 };
 
 /**

apps/web/src/components/widgets/__tests__/OrchestratorEventsWidget.test.tsx

@@ -0,0 +1,69 @@
+import { render, screen, waitFor } from "@testing-library/react";
+import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
+import { OrchestratorEventsWidget } from "../OrchestratorEventsWidget";
+
+describe("OrchestratorEventsWidget", () => {
+  const mockFetch = vi.fn();
+
+  beforeEach(() => {
+    global.fetch = mockFetch as unknown as typeof fetch;
+  });
+
+  afterEach(() => {
+    vi.clearAllMocks();
+  });
+
+  it("renders loading state initially", () => {
+    mockFetch.mockImplementation(
+      // eslint-disable-next-line @typescript-eslint/no-empty-function
+      () => new Promise(() => {})
+    );
+
+    render(<OrchestratorEventsWidget id="orchestrator-events-1" config={{}} />);
+    expect(screen.getByText("Loading orchestrator events...")).toBeInTheDocument();
+  });
+
+  it("renders events and matrix signal count", async () => {
+    mockFetch.mockResolvedValue({
+      ok: true,
+      json: () =>
+        Promise.resolve({
+          events: [
+            {
+              type: "task.completed",
+              timestamp: "2026-02-17T16:40:00.000Z",
+              taskId: "TASK-1",
+              data: { channelId: "room-123" },
+            },
+            {
+              type: "agent.running",
+              timestamp: "2026-02-17T16:41:00.000Z",
+              taskId: "TASK-2",
+              agentId: "agent-abc12345",
+            },
+          ],
+        }),
+    });
+
+    render(<OrchestratorEventsWidget id="orchestrator-events-1" config={{}} />);
+
+    await waitFor(() => {
+      expect(screen.getByText("task.completed")).toBeInTheDocument();
+      expect(screen.getByText("agent.running")).toBeInTheDocument();
+      expect(screen.getByText(/Matrix signals: 1/)).toBeInTheDocument();
+    });
+  });
+
+  it("renders error state when API fails", async () => {
+    mockFetch.mockResolvedValue({
+      ok: false,
+      status: 503,
+    });
+
+    render(<OrchestratorEventsWidget id="orchestrator-events-1" config={{}} />);
+
+    await waitFor(() => {
+      expect(screen.getByText(/Unable to load events: HTTP 503/)).toBeInTheDocument();
+    });
+  });
+});

apps/web/src/components/widgets/__tests__/WidgetRegistry.test.tsx

@@ -10,6 +10,7 @@ import { widgetRegistry } from "../WidgetRegistry";
 import { TasksWidget } from "../TasksWidget";
 import { CalendarWidget } from "../CalendarWidget";
 import { QuickCaptureWidget } from "../QuickCaptureWidget";
+import { OrchestratorEventsWidget } from "../OrchestratorEventsWidget";
 
 describe("WidgetRegistry", (): void => {
   it("should have a registry of widgets", (): void => {
@@ -32,6 +33,11 @@ describe("WidgetRegistry", (): void => {
     expect(widgetRegistry.QuickCaptureWidget!.component).toBe(QuickCaptureWidget);
   });
 
+  it("should include OrchestratorEventsWidget in registry", (): void => {
+    expect(widgetRegistry.OrchestratorEventsWidget).toBeDefined();
+    expect(widgetRegistry.OrchestratorEventsWidget!.component).toBe(OrchestratorEventsWidget);
+  });
+
   it("should have correct metadata for TasksWidget", (): void => {
     const tasksWidget = widgetRegistry.TasksWidget!;
     expect(tasksWidget.name).toBe("TasksWidget");

apps/web/src/components/widgets/index.ts

@@ -6,3 +6,4 @@ export { TasksWidget } from "./TasksWidget";
 export { CalendarWidget } from "./CalendarWidget";
 export { QuickCaptureWidget } from "./QuickCaptureWidget";
 export { AgentStatusWidget } from "./AgentStatusWidget";
+export { OrchestratorEventsWidget } from "./OrchestratorEventsWidget";