feat: replace google web search with tavily web search (#329)

packages/cli/src/config/config.ts

@@ -69,6 +69,7 @@ export interface CliArgs {
   proxy: string | undefined;
   includeDirectories: string[] | undefined;
   loadMemoryFromIncludeDirectories: boolean | undefined;
+  tavilyApiKey: string | undefined;
 }
 
 export async function parseArguments(): Promise<CliArgs> {
@@ -215,6 +216,10 @@ export async function parseArguments(): Promise<CliArgs> {
       type: 'string',
       description: 'OpenAI base URL (for custom endpoints)',
     })
+    .option('tavily-api-key', {
+      type: 'string',
+      description: 'Tavily API key for web search functionality',
+    })
     .option('proxy', {
       type: 'string',
       description:
@@ -334,6 +339,11 @@ export async function loadCliConfig(
     process.env.OPENAI_BASE_URL = argv.openaiBaseUrl;
   }
 
+  // Handle Tavily API key from command line
+  if (argv.tavilyApiKey) {
+    process.env.TAVILY_API_KEY = argv.tavilyApiKey;
+  }
+
   // Set the context filename in the server's memoryTool module BEFORE loading memory
   // TODO(b/343434939): This is a bit of a hack. The contextFileName should ideally be passed
   // directly to the Config constructor in core, and have core handle setGeminiMdFilename.
@@ -513,6 +523,8 @@ export async function loadCliConfig(
     ],
     contentGenerator: settings.contentGenerator,
     cliVersion,
+    tavilyApiKey:
+      argv.tavilyApiKey || settings.tavilyApiKey || process.env.TAVILY_API_KEY,
   });
 }