fix: route Exa and CodeGraph through shared mcp adapter

extensions/mcp-config.ts

@@ -0,0 +1,33 @@
+import type { McpConfig } from "pi-mcp-adapter";
+
+export const EXA_TOOLS = ["web_search_exa", "web_fetch_exa", "web_search_advanced_exa"];
+const EXA_MCP_URL = `https://mcp.exa.ai/mcp?tools=${EXA_TOOLS.join(",")}`;
+
+export const MCP_CONFIG: McpConfig = {
+	settings: {
+		disableProxyTool: true,
+		scriptMode: false,
+	},
+	mcpServers: {
+		exa: {
+			url: EXA_MCP_URL,
+			protocolVersion: "auto",
+			lifecycle: "eager",
+			directTools: EXA_TOOLS,
+			includeTools: EXA_TOOLS,
+			toolPrefix: "none",
+			approveTools: false,
+			exposeResources: false,
+		},
+		codegraph: {
+			command: "codegraph",
+			args: ["serve", "--mcp"],
+			lifecycle: "keep-alive",
+			directTools: ["codegraph_explore"],
+			includeTools: ["codegraph_explore"],
+			toolPrefix: "none",
+			approveTools: false,
+			exposeResources: false,
+		},
+	},
+};