feat: add gateway restart tool

src/agents/clawdis-gateway-tool.test.ts

@@ -0,0 +1,36 @@
+import { describe, expect, it, vi } from "vitest";
+
+import { createClawdisTools } from "./clawdis-tools.js";
+
+describe("clawdis_gateway tool", () => {
+  it("schedules SIGUSR1 restart", async () => {
+    vi.useFakeTimers();
+    const kill = vi.spyOn(process, "kill").mockImplementation(() => true);
+
+    try {
+      const tool = createClawdisTools().find(
+        (candidate) => candidate.name === "clawdis_gateway",
+      );
+      expect(tool).toBeDefined();
+      if (!tool) throw new Error("missing clawdis_gateway tool");
+
+      const result = await tool.execute("call1", {
+        action: "restart",
+        delayMs: 0,
+      });
+      expect(result.details).toMatchObject({
+        ok: true,
+        pid: process.pid,
+        signal: "SIGUSR1",
+        delayMs: 0,
+      });
+
+      expect(kill).not.toHaveBeenCalled();
+      await vi.runAllTimersAsync();
+      expect(kill).toHaveBeenCalledWith(process.pid, "SIGUSR1");
+    } finally {
+      kill.mockRestore();
+      vi.useRealTimers();
+    }
+  });
+});