feat!: make web search Exa-only

BREAKING CHANGE: remove Tavily, Firecrawl, provider fallback,
and web-search-config. web_search and web_fetch now use
Exa-shaped inputs and return raw Exa-style details.

src/tools/web-fetch.test.ts

@@ -2,14 +2,14 @@ import test from "node:test";
 import assert from "node:assert/strict";
 import { createWebFetchTool } from "./web-fetch.ts";
 
-test("createWebFetchTool passes Firecrawl fetch options through to the runtime", async () => {
+test("createWebFetchTool passes Exa getContents options through without injecting default text", async () => {
   let captured: any;
 
   const tool = createWebFetchTool({
     async executeFetch(request) {
       captured = request;
       return {
-        providerName: "firecrawl-main",
+        requestId: "req-fetch-1",
         results: [],
       };
     },
@@ -17,22 +17,48 @@ test("createWebFetchTool passes Firecrawl fetch options through to the runtime",
 
   await tool.execute("tool-call", {
     urls: ["https://pi.dev"],
-    provider: "firecrawl-main",
-    firecrawl: {
-      formats: ["markdown", "summary", "images"],
+    summary: true,
+    extras: {
+      links: 5,
     },
   } as any);
 
   assert.deepEqual(captured, {
     urls: ["https://pi.dev/"],
-    text: true,
-    highlights: false,
-    summary: false,
-    textMaxCharacters: undefined,
-    provider: "firecrawl-main",
-    tavily: undefined,
-    firecrawl: {
-      formats: ["markdown", "summary", "images"],
+    summary: true,
+    extras: {
+      links: 5,
     },
   });
 });
+
+test("createWebFetchTool supports the single-url alias", async () => {
+  let captured: any;
+
+  const tool = createWebFetchTool({
+    async executeFetch(request) {
+      captured = request;
+      return {
+        requestId: "req-fetch-1",
+        results: [],
+      };
+    },
+  });
+
+  const prepared = tool.prepareArguments({ url: "https://exa.ai" });
+  await tool.execute("tool-call", prepared as any);
+
+  assert.deepEqual(captured, {
+    urls: ["https://exa.ai/"],
+  });
+});
+
+test("createWebFetchTool rejects invalid urls", async () => {
+  const tool = createWebFetchTool({
+    async executeFetch() {
+      throw new Error("not used");
+    },
+  });
+
+  await assert.rejects(() => tool.execute("tool-call", { urls: ["notaurl"] } as any), /Invalid URL: notaurl/);
+});