feat: Enable Anthropic web search by updating beta headers and removing tool filtering, and reorder validator imports.

Author: dosco

src/ax/ai/anthropic/api.ts

@@ -291,12 +291,6 @@ class AxAIAnthropicImpl
       ...configToolsCleaned,
     ];
 
-    // Anthropic Vertex does not support server tools like web_search; filter them out
-    if (this.isVertex && tools.length > 0) {
-      tools = tools.filter(
-        (t: any) => !(t && typeof t === 'object' && 'type' in t)
-      );
-    }
     if (tools.length === 0) {
       tools = undefined;
     }
@@ -870,7 +864,8 @@ export class AxAIAnthropic<TModelKey = string> extends AxBaseAI<
       apiURL = 'https://api.anthropic.com/v1';
       headers = async () => ({
         'anthropic-version': '2023-06-01',
-        'anthropic-beta': 'structured-outputs-2025-11-13',
+        'anthropic-beta':
+          'structured-outputs-2025-11-13, web-search-2025-03-05',
         'x-api-key': typeof apiKey === 'function' ? await apiKey() : apiKey,
       });
     }

src/ax/dsp/generate.ts

@@ -47,11 +47,6 @@ import {
 } from './functions.js';
 import { axGlobals } from './globals.js';
 import { toJsonSchema } from './jsonSchema.js';
-import {
-  validateURL,
-  validateStringConstraints,
-  validateNumberConstraints,
-} from './validators.js';
 import {
   type AxGenMetricsInstruments,
   getOrCreateGenMetricsInstruments,
@@ -90,6 +85,11 @@ import type {
   AxSetExamplesOptions,
 } from './types.js';
 import { mergeDeltas } from './util.js';
+import {
+  validateNumberConstraints,
+  validateStringConstraints,
+  validateURL,
+} from './validators.js';
 
 export type AxGenerateResult<OUT> = OUT & {
   thought?: string;