feat(web): add orchestrator command system in chat interface (#521)

Co-authored-by: Jason Woltje <jason@diversecanvas.com>
Co-committed-by: Jason Woltje <jason@diversecanvas.com>

apps/web/src/hooks/useOrchestratorCommands.test.ts

@@ -0,0 +1,293 @@
+/**
+ * Tests for useOrchestratorCommands hook
+ */
+
+import { describe, it, expect, vi, beforeEach } from "vitest";
+import { renderHook, act } from "@testing-library/react";
+import { useOrchestratorCommands } from "./useOrchestratorCommands";
+import type { Message } from "./useChat";
+
+// Mock fetch globally
+const mockFetch = vi.fn();
+global.fetch = mockFetch;
+
+function makeOkResponse(data: unknown): Response {
+  return {
+    ok: true,
+    status: 200,
+    json: () => Promise.resolve(data),
+    text: () => Promise.resolve(JSON.stringify(data)),
+  } as unknown as Response;
+}
+
+/** Run executeCommand and return the result synchronously after act() */
+async function runCommand(
+  executeCommand: (content: string) => Promise<Message | null>,
+  content: string
+): Promise<Message | null> {
+  let msg: Message | null = null;
+  await act(async () => {
+    msg = await executeCommand(content);
+  });
+  return msg;
+}
+
+describe("useOrchestratorCommands", () => {
+  beforeEach(() => {
+    mockFetch.mockReset();
+  });
+
+  describe("isCommand", () => {
+    it("returns true for messages starting with /", () => {
+      const { result } = renderHook(() => useOrchestratorCommands());
+      expect(result.current.isCommand("/status")).toBe(true);
+      expect(result.current.isCommand("/agents")).toBe(true);
+      expect(result.current.isCommand("/help")).toBe(true);
+      expect(result.current.isCommand("  /status")).toBe(true);
+    });
+
+    it("returns false for regular messages", () => {
+      const { result } = renderHook(() => useOrchestratorCommands());
+      expect(result.current.isCommand("hello")).toBe(false);
+      expect(result.current.isCommand("tell me about /status")).toBe(false);
+      expect(result.current.isCommand("")).toBe(false);
+    });
+  });
+
+  describe("executeCommand", () => {
+    describe("/help", () => {
+      it("returns help message without network calls", async () => {
+        const { result } = renderHook(() => useOrchestratorCommands());
+        const msg = await runCommand(result.current.executeCommand, "/help");
+
+        expect(mockFetch).not.toHaveBeenCalled();
+        expect(msg).not.toBeNull();
+        expect(msg?.role).toBe("assistant");
+        expect(msg?.content).toContain("/status");
+        expect(msg?.content).toContain("/agents");
+        expect(msg?.content).toContain("/jobs");
+        expect(msg?.content).toContain("/pause");
+        expect(msg?.content).toContain("/resume");
+      });
+
+      it("returns message with id and createdAt", async () => {
+        const { result } = renderHook(() => useOrchestratorCommands());
+        const msg = await runCommand(result.current.executeCommand, "/help");
+
+        expect(msg?.id).toBeDefined();
+        expect(msg?.createdAt).toBeDefined();
+      });
+    });
+
+    describe("/status", () => {
+      it("calls /api/orchestrator/health and returns formatted status", async () => {
+        mockFetch.mockResolvedValueOnce(
+          makeOkResponse({ status: "ready", version: "1.2.3", uptime: 3661 })
+        );
+
+        const { result } = renderHook(() => useOrchestratorCommands());
+        const msg = await runCommand(result.current.executeCommand, "/status");
+
+        expect(mockFetch).toHaveBeenCalledWith("/api/orchestrator/health", { method: "GET" });
+        expect(msg?.role).toBe("assistant");
+        expect(msg?.content).toContain("Ready");
+        expect(msg?.content).toContain("1.2.3");
+        expect(msg?.content).toContain("1h");
+      });
+
+      it("shows Not Ready when status is not ready", async () => {
+        mockFetch.mockResolvedValueOnce(makeOkResponse({ status: "not-ready" }));
+
+        const { result } = renderHook(() => useOrchestratorCommands());
+        const msg = await runCommand(result.current.executeCommand, "/status");
+
+        expect(msg?.content).toContain("Not Ready");
+      });
+
+      it("handles network error gracefully", async () => {
+        mockFetch.mockRejectedValueOnce(new Error("Connection refused"));
+
+        const { result } = renderHook(() => useOrchestratorCommands());
+        const msg = await runCommand(result.current.executeCommand, "/status");
+
+        expect(msg?.role).toBe("assistant");
+        expect(msg?.content).toContain("Error");
+        expect(msg?.content).toContain("Connection refused");
+      });
+
+      it("shows error from API response", async () => {
+        mockFetch.mockResolvedValueOnce(
+          makeOkResponse({ error: "ORCHESTRATOR_API_KEY is not configured" })
+        );
+
+        const { result } = renderHook(() => useOrchestratorCommands());
+        const msg = await runCommand(result.current.executeCommand, "/status");
+
+        expect(msg?.content).toContain("Not reachable");
+      });
+    });
+
+    describe("/agents", () => {
+      it("calls /api/orchestrator/agents and returns agent table", async () => {
+        const agents = [
+          { id: "agent-1", status: "active", type: "codex", startedAt: "2026-02-25T10:00:00Z" },
+          {
+            id: "agent-2",
+            agentStatus: "TERMINATED",
+            channel: "claude",
+            startedAt: "2026-02-25T09:00:00Z",
+          },
+        ];
+        mockFetch.mockResolvedValueOnce(makeOkResponse(agents));
+
+        const { result } = renderHook(() => useOrchestratorCommands());
+        const msg = await runCommand(result.current.executeCommand, "/agents");
+
+        expect(mockFetch).toHaveBeenCalledWith("/api/orchestrator/agents", { method: "GET" });
+        expect(msg?.content).toContain("agent-1");
+        expect(msg?.content).toContain("agent-2");
+        expect(msg?.content).toContain("TERMINATED");
+      });
+
+      it("handles empty agent list", async () => {
+        mockFetch.mockResolvedValueOnce(makeOkResponse([]));
+
+        const { result } = renderHook(() => useOrchestratorCommands());
+        const msg = await runCommand(result.current.executeCommand, "/agents");
+
+        expect(msg?.content).toContain("No agents currently running");
+      });
+
+      it("handles agents in nested object", async () => {
+        const data = {
+          agents: [{ id: "agent-nested", status: "active" }],
+        };
+        mockFetch.mockResolvedValueOnce(makeOkResponse(data));
+
+        const { result } = renderHook(() => useOrchestratorCommands());
+        const msg = await runCommand(result.current.executeCommand, "/agents");
+
+        expect(msg?.content).toContain("agent-nested");
+      });
+
+      it("handles network error gracefully", async () => {
+        mockFetch.mockRejectedValueOnce(new Error("Timeout"));
+
+        const { result } = renderHook(() => useOrchestratorCommands());
+        const msg = await runCommand(result.current.executeCommand, "/agents");
+
+        expect(msg?.content).toContain("Error");
+        expect(msg?.content).toContain("Timeout");
+      });
+    });
+
+    describe("/jobs", () => {
+      it("calls /api/orchestrator/queue/stats", async () => {
+        mockFetch.mockResolvedValueOnce(
+          makeOkResponse({ pending: 3, active: 1, completed: 42, failed: 0 })
+        );
+
+        const { result } = renderHook(() => useOrchestratorCommands());
+        const msg = await runCommand(result.current.executeCommand, "/jobs");
+
+        expect(mockFetch).toHaveBeenCalledWith("/api/orchestrator/queue/stats", { method: "GET" });
+        expect(msg?.content).toContain("3");
+        expect(msg?.content).toContain("42");
+        expect(msg?.content).toContain("Pending");
+        expect(msg?.content).toContain("Completed");
+      });
+
+      it("/queue is an alias for /jobs", async () => {
+        mockFetch.mockResolvedValueOnce(makeOkResponse({ pending: 0, active: 0 }));
+
+        const { result } = renderHook(() => useOrchestratorCommands());
+        const msg = await runCommand(result.current.executeCommand, "/queue");
+
+        expect(mockFetch).toHaveBeenCalledWith("/api/orchestrator/queue/stats", { method: "GET" });
+        expect(msg?.role).toBe("assistant");
+      });
+
+      it("shows paused indicator when queue is paused", async () => {
+        mockFetch.mockResolvedValueOnce(makeOkResponse({ pending: 0, active: 0, paused: true }));
+
+        const { result } = renderHook(() => useOrchestratorCommands());
+        const msg = await runCommand(result.current.executeCommand, "/jobs");
+
+        expect(msg?.content).toContain("paused");
+      });
+    });
+
+    describe("/pause", () => {
+      it("calls POST /api/orchestrator/queue/pause", async () => {
+        mockFetch.mockResolvedValueOnce(
+          makeOkResponse({ success: true, message: "Queue paused." })
+        );
+
+        const { result } = renderHook(() => useOrchestratorCommands());
+        const msg = await runCommand(result.current.executeCommand, "/pause");
+
+        expect(mockFetch).toHaveBeenCalledWith("/api/orchestrator/queue/pause", {
+          method: "POST",
+        });
+        expect(msg?.content).toContain("paused");
+      });
+
+      it("handles API error response", async () => {
+        mockFetch.mockResolvedValueOnce(makeOkResponse({ error: "Already paused." }));
+
+        const { result } = renderHook(() => useOrchestratorCommands());
+        const msg = await runCommand(result.current.executeCommand, "/pause");
+
+        expect(msg?.content).toContain("failed");
+        expect(msg?.content).toContain("Already paused");
+      });
+
+      it("handles network error", async () => {
+        mockFetch.mockRejectedValueOnce(new Error("Network failure"));
+
+        const { result } = renderHook(() => useOrchestratorCommands());
+        const msg = await runCommand(result.current.executeCommand, "/pause");
+
+        expect(msg?.content).toContain("Error");
+      });
+    });
+
+    describe("/resume", () => {
+      it("calls POST /api/orchestrator/queue/resume", async () => {
+        mockFetch.mockResolvedValueOnce(
+          makeOkResponse({ success: true, message: "Queue resumed." })
+        );
+
+        const { result } = renderHook(() => useOrchestratorCommands());
+        const msg = await runCommand(result.current.executeCommand, "/resume");
+
+        expect(mockFetch).toHaveBeenCalledWith("/api/orchestrator/queue/resume", {
+          method: "POST",
+        });
+        expect(msg?.content).toContain("resumed");
+      });
+    });
+
+    describe("unknown command", () => {
+      it("returns help hint for unknown commands", async () => {
+        const { result } = renderHook(() => useOrchestratorCommands());
+        const msg = await runCommand(result.current.executeCommand, "/unknown-command");
+
+        expect(mockFetch).not.toHaveBeenCalled();
+        expect(msg?.content).toContain("Unknown command");
+        expect(msg?.content).toContain("/unknown-command");
+        expect(msg?.content).toContain("/help");
+      });
+    });
+
+    describe("non-command input", () => {
+      it("returns null for regular messages", async () => {
+        const { result } = renderHook(() => useOrchestratorCommands());
+        const msg = await runCommand(result.current.executeCommand, "hello world");
+
+        expect(msg).toBeNull();
+        expect(mockFetch).not.toHaveBeenCalled();
+      });
+    });
+  });
+});