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fix(core): Set op on ended Vercel AI spans #18553

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fix(core): Set op on ended Vercel AI spans #18553

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30 changes: 29 additions & 1 deletion packages/core/src/tracing/vercel-ai/index.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -109,12 +109,40 @@ function vercelAiEventProcessor(event: Event): Event {
* Post-process spans emitted by the Vercel AI SDK.
*/
function processEndedVercelAiSpan(span: SpanJSON): void {
const { data: attributes, origin } = span;
const { data: attributes, origin, description: name } = span;

if (origin !== 'auto.vercelai.otel') {
return;
}

// Ensure ended spans still get a GenAI op even if the required attributes were not present at span start.
// This is important for Sentry's AI Agents UI, which relies on `span.op` being set to `gen_ai.*`.
// See: https://github.com/getsentry/sentry-javascript/issues/18448
if (name && (span.op === 'default' || !span.op)) {
if (
name === 'ai.generateText' ||
name === 'ai.streamText' ||
name === 'ai.generateObject' ||
name === 'ai.streamObject' ||
name === 'ai.embed' ||
name === 'ai.embedMany'
) {
span.op = 'gen_ai.invoke_agent';
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@chargome chargome Dec 18, 2025

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We're generally using constants for these attributes, you'll find other occurrences in this file.

} else if (name === 'ai.generateText.doGenerate') {
span.op = 'gen_ai.generate_text';
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@chargome chargome Dec 18, 2025

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op should be updated like this:

span.setAttribute(SEMANTIC_ATTRIBUTE_SENTRY_OP, YOUR_AI_ATTRIBUTE);

} else if (name === 'ai.streamText.doStream') {
span.op = 'gen_ai.stream_text';
} else if (name === 'ai.generateObject.doGenerate') {
span.op = 'gen_ai.generate_object';
} else if (name === 'ai.streamObject.doStream') {
span.op = 'gen_ai.stream_object';
} else if (name === 'ai.embed.doEmbed') {
span.op = 'gen_ai.embed';
} else if (name === 'ai.embedMany.doEmbed') {
span.op = 'gen_ai.embed_many';
}
}
Comment on lines +121 to +144
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@chargome chargome Dec 18, 2025

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I think a cleaner approach would be to determine the name with a map here.


renameAttributeKey(attributes, AI_USAGE_COMPLETION_TOKENS_ATTRIBUTE, GEN_AI_USAGE_OUTPUT_TOKENS_ATTRIBUTE);
renameAttributeKey(attributes, AI_USAGE_PROMPT_TOKENS_ATTRIBUTE, GEN_AI_USAGE_INPUT_TOKENS_ATTRIBUTE);
renameAttributeKey(attributes, AI_USAGE_CACHED_INPUT_TOKENS_ATTRIBUTE, GEN_AI_USAGE_INPUT_TOKENS_CACHED_ATTRIBUTE);
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