fix accumalting .text

Author: RulaKhaled

packages/core/src/utils/anthropic-ai/index.ts

@@ -114,8 +114,9 @@ function addResponseAttributes(span: Span, response: AnthropicAiResponse, record
             toolCalls.push(item);
           }
         }
-
-        span.setAttributes({ [GEN_AI_RESPONSE_TOOL_CALLS_ATTRIBUTE]: JSON.stringify(toolCalls) });
+        if (toolCalls.length > 0) {
+          span.setAttributes({ [GEN_AI_RESPONSE_TOOL_CALLS_ATTRIBUTE]: JSON.stringify(toolCalls) });
+        }
       }
     }
     // Completions.create

packages/core/src/utils/anthropic-ai/streaming.ts

@@ -134,16 +134,22 @@ function handleContentBlockDelta(
   state: StreamingState,
   recordOutputs: boolean,
 ): void {
-  if (event.type !== 'content_block_delta' || typeof event.index !== 'number' || !event.delta) return;
+  if (event.type !== 'content_block_delta' || !event.delta) return;
 
-  if ('partial_json' in event.delta && typeof event.delta.partial_json === 'string') {
+  // Accumulate tool_use input JSON deltas only when we have an index and an active tool block
+  if (
+    typeof event.index === 'number' &&
+    'partial_json' in event.delta &&
+    typeof event.delta.partial_json === 'string'
+  ) {
     const active = state.activeToolBlocks[event.index];
     if (active) {
       active.inputJsonParts.push(event.delta.partial_json);
     }
   }
 
-  if (recordOutputs && event.delta.text) {
+  // Accumulate streamed response text regardless of index
+  if (recordOutputs && typeof event.delta.text === 'string') {
     state.responseTexts.push(event.delta.text);
   }
 }