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fix(core): Intercept .withResponse() to preserve OpenAI stream instru…#19122

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RulaKhaled merged 1 commit intodevelopfrom
rolaabuhasna/js-1594-sentry-openai-instrumentation-breaks-withresponse
Feb 10, 2026
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fix(core): Intercept .withResponse() to preserve OpenAI stream instru…#19122
RulaKhaled merged 1 commit intodevelopfrom
rolaabuhasna/js-1594-sentry-openai-instrumentation-breaks-withresponse

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When Sentry instruments the OpenAI client, we return an instrumented promise. The OpenAI SDK returns a custom promise-like object with extra methods like .withResponse(), so returning a plain Promise breaks those methods.

We added wrapPromiseWithMethods() to proxy SDK methods back onto the instrumented promise. However, for streaming calls, .withResponse() returned the original uninstrumented stream, so we fixed it by intercepting .withResponse() in the proxy:

  • call original .withResponse() to get metadata (response, request_id)
  • await the instrumented promise
  • return the same wrapper but swap data to the instrumented stream

Closes #19073

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size-limit report 📦

⚠️ Warning: Base artifact is not the latest one, because the latest workflow run is not done yet. This may lead to incorrect results. Try to re-run all tests to get up to date results.

Path Size % Change Change
@sentry/browser 25.43 kB - -
@sentry/browser - with treeshaking flags 23.9 kB - -
@sentry/browser (incl. Tracing) 42.27 kB - -
@sentry/browser (incl. Tracing, Profiling) 46.92 kB - -
@sentry/browser (incl. Tracing, Replay) 80.91 kB - -
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags 70.52 kB - -
@sentry/browser (incl. Tracing, Replay with Canvas) 85.61 kB - -
@sentry/browser (incl. Tracing, Replay, Feedback) 97.79 kB - -
@sentry/browser (incl. Feedback) 42.15 kB - -
@sentry/browser (incl. sendFeedback) 30.11 kB - -
@sentry/browser (incl. FeedbackAsync) 35.13 kB - -
@sentry/browser (incl. Metrics) 26.54 kB - -
@sentry/browser (incl. Logs) 26.69 kB - -
@sentry/browser (incl. Metrics & Logs) 27.36 kB - -
@sentry/react 27.14 kB - -
@sentry/react (incl. Tracing) 44.52 kB - -
@sentry/vue 29.87 kB - -
@sentry/vue (incl. Tracing) 44.09 kB - -
@sentry/svelte 25.44 kB - -
CDN Bundle 27.97 kB - -
CDN Bundle (incl. Tracing) 43.04 kB - -
CDN Bundle (incl. Logs, Metrics) 28.82 kB - -
CDN Bundle (incl. Tracing, Logs, Metrics) 43.87 kB - -
CDN Bundle (incl. Replay, Logs, Metrics) 67.75 kB - -
CDN Bundle (incl. Tracing, Replay) 79.8 kB - -
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) 80.67 kB - -
CDN Bundle (incl. Tracing, Replay, Feedback) 85.23 kB - -
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) 86.13 kB - -
CDN Bundle - uncompressed 81.83 kB - -
CDN Bundle (incl. Tracing) - uncompressed 127.54 kB - -
CDN Bundle (incl. Logs, Metrics) - uncompressed 84.66 kB - -
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed 130.37 kB - -
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed 208.04 kB - -
CDN Bundle (incl. Tracing, Replay) - uncompressed 244.14 kB - -
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed 246.96 kB - -
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed 256.94 kB - -
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed 259.75 kB - -
@sentry/nextjs (client) 46.87 kB - -
@sentry/sveltekit (client) 42.66 kB - -
@sentry/node-core 52.18 kB - -
@sentry/node 166.52 kB +0.14% +220 B 🔺
@sentry/node - without tracing 93.97 kB - -
@sentry/aws-serverless 109.48 kB - -

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node-overhead report 🧳

Note: This is a synthetic benchmark with a minimal express app and does not necessarily reflect the real-world performance impact in an application.
⚠️ Warning: Base artifact is not the latest one, because the latest workflow run is not done yet. This may lead to incorrect results. Try to re-run all tests to get up to date results.

Scenario Requests/s % of Baseline Prev. Requests/s Change %
GET Baseline 8,891 - 8,917 -0%
GET With Sentry 1,605 18% 1,621 -1%
GET With Sentry (error only) 5,856 66% 6,016 -3%
POST Baseline 1,158 - 1,207 -4%
POST With Sentry 542 47% 582 -7%
POST With Sentry (error only) 1,011 87% 1,052 -4%
MYSQL Baseline 3,165 - 3,330 -5%
MYSQL With Sentry 419 13% 421 -0%
MYSQL With Sentry (error only) 2,512 79% 2,679 -6%

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const result = client.chat.completions.create({
model: 'gpt-4',
messages: [{ role: 'user', content: 'Test withResponse' }],
});
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Test doesn't cover streaming .withResponse() regression

Low Severity

The PR description states the fix is specifically for streaming calls where .withResponse() returned the original uninstrumented stream. However, the test scenario only tests non-streaming calls (no stream: true parameter). According to the review rules for fix PRs, tests should verify the specific regression being fixed. A streaming test case with .withResponse() would provide confidence that the core bug is actually fixed. Flagging this because the review rules file specifies that fix PRs should include tests for the specific regression.

Fix in Cursor Fix in Web

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Cursor Bugbot has reviewed your changes and found 2 potential issues.

Bugbot Autofix is OFF. To automatically fix reported issues with Cloud Agents, enable Autofix in the Cursor dashboard.

@RulaKhaled RulaKhaled force-pushed the rolaabuhasna/js-1594-sentry-openai-instrumentation-breaks-withresponse branch from c4734fd to 36cccca Compare February 6, 2026 15:01
@RulaKhaled RulaKhaled force-pushed the rolaabuhasna/js-1594-sentry-openai-instrumentation-breaks-withresponse branch from 36cccca to 129d794 Compare February 6, 2026 15:33
@RulaKhaled RulaKhaled requested a review from nicohrubec February 9, 2026 10:34
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lgtm

@RulaKhaled RulaKhaled merged commit 422f159 into develop Feb 10, 2026
213 checks passed
@RulaKhaled RulaKhaled deleted the rolaabuhasna/js-1594-sentry-openai-instrumentation-breaks-withresponse branch February 10, 2026 12:12
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Sentry OpenAI Instrumentation breaks withResponse()

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