feat: add web search tools extension

.pi/agent/extensions/web-search/src/extension.test.ts

@@ -0,0 +1,15 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import webSearchExtension from "../index.ts";
+
+test("the extension entrypoint registers both web_search and web_fetch", () => {
+  const registeredTools: string[] = [];
+
+  webSearchExtension({
+    registerTool(tool: { name: string }) {
+      registeredTools.push(tool.name);
+    },
+  } as any);
+
+  assert.deepEqual(registeredTools, ["web_search", "web_fetch"]);
+});