From 874246bded216a5f8819b40b04c78ee544a8ddd9 Mon Sep 17 00:00:00 2001
From: Martin Sonnberger <martin.sonnberger@sentry.io>
Date: Mon, 27 Jul 2026 10:42:19 +0200
Subject: [PATCH] feat(opentelemetry)!: Drop `.prefetch` suffix from inferred
 HTTP span ops

OTel inference fabricated the unregistered `http.client.prefetch` /
`http.server.prefetch` ops. Prefetch is request data, not an operation
category, and is already on the span as `sentry.http.prefetch`.

Ref: JS-3105

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
---
 .../src/utils/parseSpanDescription.ts         | 29 +++++++++----------
 .../test/utils/parseSpanDescription.test.ts   | 22 +++++++++++++-
 2 files changed, 34 insertions(+), 17 deletions(-)

diff --git a/packages/opentelemetry/src/utils/parseSpanDescription.ts b/packages/opentelemetry/src/utils/parseSpanDescription.ts
index f47a0ab5b618..4831b86958c8 100644
--- a/packages/opentelemetry/src/utils/parseSpanDescription.ts
+++ b/packages/opentelemetry/src/utils/parseSpanDescription.ts
@@ -15,6 +15,11 @@ import {
   SENTRY_KIND,
   URL_FULL,
 } from '@sentry/conventions/attributes';
+import {
+  WEB_SERVER_HTTP_CLIENT_SPAN_OP,
+  WEB_SERVER_HTTP_SERVER_SPAN_OP,
+  WEB_SERVER_HTTP_SPAN_OP,
+} from '@sentry/conventions/op';
 import type { Span, SpanAttributes, TransactionSource } from '@sentry/core';
 import {
   getSanitizedUrlString,
@@ -139,27 +144,19 @@ export function descriptionForHttpMethod(
   { name, attributes }: { name: string; attributes: Attributes },
   httpMethod: AttributeValue,
 ): SpanDescription {
-  const opParts = ['http'];
   const kind = attributes[SENTRY_KIND];
 
-  switch (kind) {
-    case 'client':
-      opParts.push('client');
-      break;
-    case 'server':
-      opParts.push('server');
-      break;
-  }
-
-  // Spans for HTTP requests we have determined to be prefetch requests will have a `.prefetch` postfix in the op
-  if (attributes['sentry.http.prefetch']) {
-    opParts.push('prefetch');
-  }
+  const op =
+    kind === 'client'
+      ? WEB_SERVER_HTTP_CLIENT_SPAN_OP
+      : kind === 'server'
+        ? WEB_SERVER_HTTP_SERVER_SPAN_OP
+        : WEB_SERVER_HTTP_SPAN_OP;
 
   const { urlPath, url, query, fragment, hasRoute } = getSanitizedUrl(attributes);
 
   if (!urlPath) {
-    return { ...getUserUpdatedNameAndSource(name, attributes), op: opParts.join('.') };
+    return { ...getUserUpdatedNameAndSource(name, attributes), op };
   }
 
   const graphqlOperationsAttribute = attributes[SENTRY_GRAPHQL_OPERATION];
@@ -214,7 +211,7 @@ export function descriptionForHttpMethod(
     : getUserUpdatedNameAndSource(name, attributes);
 
   return {
-    op: opParts.join('.'),
+    op,
     description,
     source,
     data,
diff --git a/packages/opentelemetry/test/utils/parseSpanDescription.test.ts b/packages/opentelemetry/test/utils/parseSpanDescription.test.ts
index 46229b90ed9a..89e2d10b5f3c 100644
--- a/packages/opentelemetry/test/utils/parseSpanDescription.test.ts
+++ b/packages/opentelemetry/test/utils/parseSpanDescription.test.ts
@@ -386,7 +386,7 @@ describe('descriptionForHttpMethod', () => {
       },
       'test name',
       {
-        op: 'http.client.prefetch',
+        op: 'http.client',
         description: 'GET https://www.example.com/my-path',
         data: {
           url: 'https://www.example.com/my-path',
@@ -394,6 +394,26 @@ describe('descriptionForHttpMethod', () => {
         source: 'url',
       },
     ],
+    [
+      'works with prefetch server request',
+      'GET',
+      {
+        [HTTP_METHOD]: 'GET',
+        [HTTP_URL]: 'https://www.example.com/my-path',
+        [HTTP_TARGET]: '/my-path',
+        'sentry.http.prefetch': true,
+        [SENTRY_KIND]: 'server',
+      },
+      'test name',
+      {
+        op: 'http.server',
+        description: 'GET /my-path',
+        data: {
+          url: 'https://www.example.com/my-path',
+        },
+        source: 'url',
+      },
+    ],
     [
       'works with basic server POST',
       'POST',