remove truncation

Author: RulaKhaled

packages/core/src/tracing/ai/messageTruncation.ts

@@ -122,20 +122,6 @@ function withPartText(part: TextPart | MediaPart, text: string): TextPart {
   return { ...part, text };
 }
 
-/**
- * Check if a content array part is a text part ({ type: "text", text: "..." }).
- */
-function isTextContentPart(part: unknown): part is { type: 'text'; text: string } {
-  return (
-    part !== null &&
-    typeof part === 'object' &&
-    'type' in part &&
-    part.type === 'text' &&
-    'text' in part &&
-    typeof part.text === 'string'
-  );
-}
-
 /**
  * Check if a message has the OpenAI/Anthropic content format.
  */
@@ -243,63 +229,6 @@ function truncatePartsMessage(message: PartsMessage, maxBytes: number): unknown[
   }
 }
 
-/**
- * Truncate a message with `content: [...]` array format (Vercel AI SDK, OpenAI multimodal).
- * Content arrays contain parts like `{ type: "text", text: "..." }`.
- * Keeps as many complete parts as possible, only truncating text parts if needed.
- *
- * @param message - Message with content array property
- * @param maxBytes - Maximum byte limit
- * @returns Array with truncated message, or empty array if it doesn't fit
- */
-function truncateContentArrayMessage(message: ContentArrayMessage, maxBytes: number): unknown[] {
-  const { content } = message;
-
-  // Calculate overhead by creating empty text parts (non-text parts keep their size)
-  const emptyContent = content.map(part => (isTextContentPart(part) ? { ...part, text: '' } : part));
-  const overhead = jsonBytes({ ...message, content: emptyContent });
-  let remainingBytes = maxBytes - overhead;
-
-  if (remainingBytes <= 0) {
-    return [];
-  }
-
-  // Include parts until we run out of space
-  const includedParts: ContentArrayMessage['content'] = [];
-
-  for (const part of content) {
-    if (isTextContentPart(part)) {
-      // Text part: check if it fits, truncate if needed
-      const textSize = utf8Bytes(part.text);
-
-      if (textSize <= remainingBytes) {
-        // Text fits: include it as-is
-        includedParts.push(part);
-        remainingBytes -= textSize;
-      } else if (includedParts.length === 0) {
-        // First part doesn't fit: truncate it
-        const truncated = truncateTextByBytes(part.text, remainingBytes);
-        if (truncated) {
-          includedParts.push({ ...part, text: truncated });
-        }
-        break;
-      } else {
-        // Subsequent text part doesn't fit: stop here
-        break;
-      }
-    } else {
-      // Non-text part (image, etc.): size is already in overhead, include it
-      includedParts.push(part);
-    }
-  }
-
-  if (includedParts.length === 0) {
-    return [];
-  }
-
-  return [{ ...message, content: includedParts }];
-}
-
 /**
  * Truncate a single message to fit within maxBytes.
  *
@@ -330,7 +259,8 @@ function truncateSingleMessage(message: unknown, maxBytes: number): unknown[] {
   }
 
   if (isContentArrayMessage(message)) {
-    return truncateContentArrayMessage(message, maxBytes);
+    // Content array messages are returned as-is without truncation
+    return [message];
   }
 
   if (isPartsMessage(message)) {