add braintrust logger for server

apps/server/src/index.ts

@@ -5,6 +5,12 @@ import { z } from 'zod';
 import { loadRootEnv } from '@buster/env-utils';
 loadRootEnv();
 
+// Initialize Braintrust logger
+import { initBraintrustLogger } from '@buster/ai';
+
+// Initialize Braintrust logger
+initBraintrustLogger();
+
 // Import custom middleware
 import { corsMiddleware } from './middleware/cors';
 import { loggerMiddleware } from './middleware/logger';

packages/ai/src/utils/index.ts

@@ -3,3 +3,6 @@ export * from './tool-call-repair';
 
 // Message conversion utilities
 export * from './message-conversion';
+
+// Logger utilities
+export * from './logger';

packages/ai/src/utils/logger.ts

@@ -0,0 +1,28 @@
+import { initLogger } from 'braintrust';
+
+/**
+ * Initialize Braintrust logger with environment configuration
+ * @param options Optional configuration to override defaults
+ * @returns Initialized Braintrust logger
+ */
+export function initBraintrustLogger(options?: {
+  apiKey?: string;
+  projectName?: string;
+}) {
+  const apiKey = options?.apiKey || process.env.BRAINTRUST_KEY;
+  const projectName = options?.projectName || process.env.ENVIRONMENT || 'development';
+
+  if (!apiKey) {
+    throw new Error('BRAINTRUST_KEY is not set');
+  }
+
+  return initLogger({
+    apiKey,
+    projectName,
+  });
+}
+
+/**
+ * Re-export initLogger from braintrust for direct access if needed
+ */
+export { initLogger } from 'braintrust';