fix: Update fastify span prefix stripping and E2E test expectations

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: nicohrubec

dev-packages/e2e-tests/test-applications/nestjs-fastify/tests/transactions.test.ts

@@ -62,7 +62,7 @@ test('Sends an API route transaction', async ({ baseURL }) => {
           data: {
             'sentry.origin': 'auto.http.otel.fastify',
             'sentry.op': 'hook.fastify',
-            'hook.name': 'fastify -> @fastify/otel -> @fastify/middie - onRequest',
+            'hook.name': 'fastify -> @sentry/instrumentation-fastify -> @fastify/middie - onRequest',
             'fastify.type': 'hook',
             'hook.callback.name': 'runMiddie',
           },
@@ -80,7 +80,7 @@ test('Sends an API route transaction', async ({ baseURL }) => {
           data: {
             'sentry.origin': 'auto.http.otel.fastify',
             'sentry.op': 'request_handler.fastify',
-            'hook.name': 'fastify -> @fastify/otel -> @fastify/middie - route-handler',
+            'hook.name': 'fastify -> @sentry/instrumentation-fastify -> @fastify/middie - route-handler',
             'fastify.type': 'request-handler',
             'http.route': '/test-transaction',
             'hook.callback.name': 'anonymous',

dev-packages/e2e-tests/test-applications/node-fastify-4/tests/transactions.test.ts

@@ -69,11 +69,11 @@ test('Sends an API route transaction', async ({ baseURL }) => {
     data: {
       'fastify.type': 'hook',
       'hook.callback.name': 'anonymous',
-      'hook.name': 'fastify -> @fastify/otel - onRequest',
+      'hook.name': 'fastify -> @sentry/instrumentation-fastify - onRequest',
       'sentry.op': 'hook.fastify',
       'sentry.origin': 'auto.http.otel.fastify',
     },
-    description: '@fastify/otel - onRequest',
+    description: '@sentry/instrumentation-fastify - onRequest',
     op: 'hook.fastify',
     parent_span_id: expect.stringMatching(/[a-f0-9]{16}/),
     span_id: expect.stringMatching(/[a-f0-9]{16}/),

dev-packages/e2e-tests/test-applications/node-fastify-5/tests/transactions.test.ts

@@ -69,11 +69,11 @@ test('Sends an API route transaction', async ({ baseURL }) => {
     data: {
       'fastify.type': 'hook',
       'hook.callback.name': 'anonymous',
-      'hook.name': 'fastify -> @fastify/otel - onRequest',
+      'hook.name': 'fastify -> @sentry/instrumentation-fastify - onRequest',
       'sentry.op': 'hook.fastify',
       'sentry.origin': 'auto.http.otel.fastify',
     },
-    description: '@fastify/otel - onRequest',
+    description: '@sentry/instrumentation-fastify - onRequest',
     op: 'hook.fastify',
     parent_span_id: expect.stringMatching(/[a-f0-9]{16}/),
     span_id: expect.stringMatching(/[a-f0-9]{16}/),

packages/node/src/integrations/tracing/fastify/index.ts

@@ -294,7 +294,10 @@ function addFastifySpanAttributes(span: Span): void {
     // Try removing `fastify -> ` and `@fastify/otel -> ` prefixes
     // This is a bit of a hack, and not always working for all spans
     // But it's the best we can do without a proper API
-    const updatedName = attrName.replace(/^fastify -> /, '').replace(/^@fastify\/otel -> /, '');
+    const updatedName = attrName
+      .replace(/^fastify -> /, '')
+      .replace(/^@fastify\/otel -> /, '')
+      .replace(/^@sentry\/instrumentation-fastify -> /, '');
 
     span.updateName(updatedName);
   }