refactor(agent): dedupe harness and command workflows

src/agents/tools/web-fetch.test-harness.ts

@@ -0,0 +1,49 @@
+import { afterEach, beforeEach, vi } from "vitest";
+import * as ssrf from "../../infra/net/ssrf.js";
+
+export function installWebFetchSsrfHarness() {
+  const lookupMock = vi.fn();
+  const resolvePinnedHostname = ssrf.resolvePinnedHostname;
+  const priorFetch = global.fetch;
+
+  beforeEach(() => {
+    lookupMock.mockResolvedValue([{ address: "93.184.216.34", family: 4 }]);
+    vi.spyOn(ssrf, "resolvePinnedHostname").mockImplementation((hostname) =>
+      resolvePinnedHostname(hostname, lookupMock),
+    );
+  });
+
+  afterEach(() => {
+    global.fetch = priorFetch;
+    lookupMock.mockReset();
+    vi.restoreAllMocks();
+  });
+}
+
+export function createBaseWebFetchToolConfig(opts?: { maxResponseBytes?: number }): {
+  config: {
+    tools: {
+      web: {
+        fetch: {
+          cacheTtlMinutes: number;
+          firecrawl: { enabled: boolean };
+          maxResponseBytes?: number;
+        };
+      };
+    };
+  };
+} {
+  return {
+    config: {
+      tools: {
+        web: {
+          fetch: {
+            cacheTtlMinutes: 0,
+            firecrawl: { enabled: false },
+            ...(opts?.maxResponseBytes ? { maxResponseBytes: opts.maxResponseBytes } : {}),
+          },
+        },
+      },
+    },
+  };
+}