Merge branch 'main' into feature/exa-search

packages/builtin-tools/src/tools/WebSearchTool/adapters/index.ts

@@ -17,17 +17,37 @@ export type {
   WebSearchAdapter,
 } from './types.js'
 
+/**
+ * Check if the current session uses a third-party (non-Anthropic) API provider.
+ * These providers don't support Anthropic's server_tools (server-side web search),
+ * so they must fall back to the Bing scraper adapter.
+ */
+function isThirdPartyProvider(): boolean {
+  return !!(
+    process.env.CLAUDE_CODE_USE_OPENAI ||
+    process.env.CLAUDE_CODE_USE_GEMINI ||
+    process.env.CLAUDE_CODE_USE_GROK
+  )
+}
+
 let cachedAdapter: WebSearchAdapter | null = null
 let cachedAdapterKey: 'api' | 'bing' | 'brave' | 'exa' | null = null
 
 export function createAdapter(): WebSearchAdapter {
   const envAdapter = process.env.WEB_SEARCH_ADAPTER
+  // Priority:
+  //   1. Explicit env override (WEB_SEARCH_ADAPTER=api|bing|brave)
+  //   2. Third-party provider (OpenAI/Gemini/Grok) → bing (no server_tools support)
+  //   3. First-party Anthropic API → api (server-side web search + connector_text)
+  //   4. Fallback → bing
   const adapterKey =
     envAdapter === 'api' || envAdapter === 'bing' || envAdapter === 'brave' || envAdapter === 'exa'
       ? envAdapter
-      : isFirstPartyAnthropicBaseUrl()
-        ? 'api'
-        : 'exa'
+      : isThirdPartyProvider()
+        ? 'bing'
+        : isFirstPartyAnthropicBaseUrl()
+          ? 'api'
+          : 'bing'
 
   if (cachedAdapter && cachedAdapterKey === adapterKey) return cachedAdapter