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fix(Tracing): Check for AI operation id to detect a vercelai span #18823

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Merged
RulaKhaled merged 3 commits into from
Jan 15, 2026
Merged

fix(Tracing): Check for AI operation id to detect a vercelai span #18823

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34bb7e0
fix(Tracing): Check for AI operation id to detect a vercelai span
RulaKhaled Jan 15, 2026
43109af
account for v5 as well
RulaKhaled Jan 15, 2026
255279b
Merge branch 'develop' into fix-ai-check
RulaKhaled Jan 15, 2026
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6 changes: 4 additions & 2 deletions packages/core/src/tracing/vercel-ai/index.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,7 @@ import {
import type { OpenAiProviderMetadata, ProviderMetadata } from './vercel-ai-attributes';
import {
AI_MODEL_ID_ATTRIBUTE,
AI_OPERATION_ID_ATTRIBUTE,
AI_PROMPT_MESSAGES_ATTRIBUTE,
AI_PROMPT_TOOLS_ATTRIBUTE,
AI_RESPONSE_OBJECT_ATTRIBUTE,
Expand Down Expand Up @@ -65,8 +66,9 @@ function onVercelAiSpanStart(span: Span): void {
return;
}

// Check if this is a Vercel AI span by name pattern.
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V6 tool call spans incorrectly processed as generate spans

High Severity

The tool call span check at line 64 requires name === 'ai.toolCall'. If V6 tool call spans also have "default" as their name (like other V6 spans), they will fail this check but pass the new V6 detection at line 71, causing them to be incorrectly processed by processGenerateSpan instead of processToolCallSpan. This breaks tool call error linking via toolCallSpanMap and applies wrong attribute transformations.

Additional Locations (1)

Fix in Cursor Fix in Web

if (!name.startsWith('ai.')) {
// V6+ Check if this is a Vercel AI span by checking if the operation ID attribute is present.
// V5+ Check if this is a Vercel AI span by name pattern.
if (!attributes[AI_OPERATION_ID_ATTRIBUTE] && !name.startsWith('ai.')) {
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V6 streaming spans incorrectly marked as non-streaming

Medium Severity

The ai.streaming attribute is set based on name.includes('stream'), which relies on V5 naming conventions where span names contain "stream" (e.g., ai.streamText). For V6 spans with a "default" name, this check will always return false, causing streaming operations to be incorrectly marked as ai.streaming = false. The fix allows V6 spans to be processed, but this downstream logic wasn't updated to handle V6 naming.

Fix in Cursor Fix in Web

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V6 spans missing sentry.op attribute

Medium Severity

The getSpanOpFromName(name) function relies on V5 naming conventions and returns undefined for V6 spans with non-standard names like "default". Since the op is only set when getSpanOpFromName returns a truthy value, V6 spans will not have SEMANTIC_ATTRIBUTE_SENTRY_OP set, which could affect span categorization and display in Sentry.

Fix in Cursor Fix in Web

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V6 spans missing op attribute after filter bypass

Medium Severity

The filter change at line 71 allows v6 spans with AI_OPERATION_ID_ATTRIBUTE through, but processGenerateSpan still relies on the span name for determining the sentry.op via getSpanOpFromName(). For v6 spans with a "default" name, getSpanOpFromName('default') returns undefined, so no op attribute is set. Additionally, name.includes('stream') will always be false for "default" names, and the span name won't be updated with the model ID since the switch statement only matches ai.* patterns. The fix allows v6 spans through but doesn't update the processing logic to use AI_OPERATION_ID_ATTRIBUTE or OPERATION_NAME_ATTRIBUTE for determining span characteristics.

Fix in Cursor Fix in Web

return;
}

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