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test(bundler-tests): Guard server runtime entries against build-time tooling - #25724

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isaacschlueter/js-3989-guard-server-runtime-entries-against-pulling-in-build-time-guard
Oct 30, 2026
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isaacschlueter/js-3989-guard-server-runtime-entries-against-pulling-in-build-time-guard

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@isaacs isaacs commented Oct 23, 2026

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Build tooling keeps leaking into server runtime entries: bundler plugins, orchestrion bundler transforms, Vite, Babel, WASM. Each time, users find it in a different consumer, often in a production deploy (#22794, #23034, #23243, #24775, #25470). Nothing stopped the same shape from coming back.

The new test traces each server runtime entry with @vercel/nft, the tracer behind Next standalone and the Vercel adapters. It resolves each entry through a fixture, under the export conditions of each runtime, in ESM and CJS. It fails if the trace reaches build-only code, and prints the import chain to it.

The trace stops at the first build-time module and does not expand globs. Without that, an entry that does reach build tooling walks all of Vite and Babel, and globs the whole repo, which takes minutes instead of seconds.

@sentry/astro and @sentry/solidstart are known violations: their root entries also re-export the config-time sentryAstro and withSentry, and must keep doing so until v12. The test fails if either becomes clean, so the list cannot go stale.

Refs #25676


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isaacs added this pull request to stack #25727 October 23, 2026 21:20
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JS-3989

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size-limit report 📦

Compared: 0341c0b (PR test merge using develop at 30cfb4c)

Against: 30cfb4c (develop) · base run #64245

✅ Baseline matches: this diff contains only this PR's changes.

Path Size % Change Change
@sentry/browser 30.39 kB - -
@sentry/browser - with treeshaking flags 28.53 kB - -
@sentry/browser - with treeshaking flags tracing without tracing 28.42 kB - -
@sentry/browser (incl. Tracing) 52.71 kB - -
@sentry/browser (incl. Tracing + Span Streaming) 52.72 kB - -
@sentry/browser (incl. Tracing, Profiling) 55.69 kB - -
@sentry/browser (incl. Tracing, Replay) 93.01 kB - -
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags 81.61 kB - -
@sentry/browser (incl. Tracing, Replay with Canvas) 97.76 kB - -
@sentry/browser (incl. Tracing, Replay, Feedback) 110.75 kB - -
@sentry/browser (incl. Feedback) 47.97 kB - -
@sentry/browser (incl. sendFeedback) 35.49 kB - -
@sentry/browser (incl. FeedbackAsync) 40.6 kB - -
@sentry/browser (incl. Metrics) 31.42 kB - -
@sentry/browser (incl. Logs) 31.72 kB - -
@sentry/browser (incl. Metrics & Logs) 32.44 kB - -
@sentry/react 32.27 kB - -
@sentry/react (incl. Tracing) 55.07 kB - -
@sentry/vue 38.66 kB - -
@sentry/vue (incl. Tracing) 55.73 kB - -
@sentry/svelte 30.42 kB - -
@sentry/remix (Remix 3 client bundle) 57.8 kB - -
CDN Bundle 32.18 kB - -
CDN Bundle (incl. Tracing) 53.23 kB - -
CDN Bundle (incl. Logs, Metrics) 34.45 kB - -
CDN Bundle (incl. Tracing, Logs, Metrics) 55.18 kB - -
CDN Bundle (incl. Replay, Logs, Metrics) 75.86 kB - -
CDN Bundle (incl. Tracing, Replay) 91.44 kB - -
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) 93.38 kB - -
CDN Bundle (incl. Tracing, Replay, Feedback) 97.56 kB - -
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) 99.55 kB - -
CDN Bundle - uncompressed 94.62 kB - -
CDN Bundle (incl. Tracing) - uncompressed 157.6 kB - -
CDN Bundle (incl. Logs, Metrics) - uncompressed 101.09 kB - -
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed 163.33 kB - -
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed 232.65 kB - -
CDN Bundle (incl. Tracing, Replay) - uncompressed 279.29 kB - -
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed 285.01 kB - -
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed 292.99 kB - -
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed 298.7 kB - -
@sentry/nextjs (client) 57.89 kB - -
@sentry/sveltekit (client) 53.22 kB - -
@sentry/core/server 44.24 kB - -
@sentry/core/browser 13.93 kB - -
@sentry/node 154.92 kB +0.02% +17 B 🔺
@sentry/node/import (ESM hook with diagnostics-channel injection) 81.95 kB - -
@sentry/node - without tracing 96.13 kB +0.03% +22 B 🔺
@sentry/node - without channel injection 135.34 kB +0.02% +16 B 🔺
@sentry/aws-serverless 104.32 kB +0.03% +23 B 🔺
@sentry/cloudflare (withSentry) - minified 197.92 kB - -
@sentry/cloudflare (withSentry) 491.93 kB - -
@sentry/nextjs/cloudflare (withSentry) - minified 218.35 kB - -

View base workflow run

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Optional E2E tests

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@nicohrubec nicohrubec left a comment •

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thanks for adding, seems useful to have to me just have a few questions/comments around keeping this up to date

@isaacs
isaacs force-pushed the isaacschlueter/js-3989-guard-server-runtime-entries-against-pulling-in-build-time-guard branch from 13284a5 to a837f5a Compare October 29, 2026 17:58
@isaacs
isaacs requested review from a team as code owners October 29, 2026 17:58
@isaacs
isaacs requested review from andreiborza, logaretm, msonnb, mydea and nicohrubec and removed request for a team October 29, 2026 17:58
…tooling

Build tooling keeps leaking into server runtime entries: bundler
plugins, orchestrion bundler transforms, Vite, Babel, WASM. Each time,
users find it in a different consumer, often in a production deploy
(#22794, #23034, #23243, #24775, #25470). Nothing stopped the same
shape from coming back.

The new test traces each server runtime entry with `@vercel/nft`, the
tracer behind Next standalone and the Vercel adapters. It resolves each
entry through a fixture, under the export conditions of each runtime,
in ESM and CJS. It fails if the trace reaches build-only code, and
prints the import chain to it.

The trace stops at the first build-time module and does not expand
globs. Without that, an entry that does reach build tooling walks all of
Vite and Babel, and globs the whole repo, which takes minutes instead of
seconds.

Every export of a tested package must now be in `CASES`,
`BUILD_TIME_CASES`, or `CLIENT_ENTRIES`. This found seven runtime
entries that the test did not check, now added to `CASES`. Two of them,
`@sentry/remix/v3` and `@sentry/remix/v3/node`, reach the orchestrion
load hook. Remix 3 has no bundler, so its asset server runs the
transform at request time. They are now known violations.

Each build-time entry must reach build-time tooling. If our tooling
changes and `BUILD_TIME_PATTERNS` no longer matches it, these cases
fail.

The test only covers packages it already knows about. A new Bugbot
rule flags a new server package, or a new export in an untested one,
so that it gets added to the test.

Refs #25676

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
@isaacs
isaacs force-pushed the isaacschlueter/js-3989-guard-server-runtime-entries-against-pulling-in-build-time-guard branch from a837f5a to 8cbb9ca Compare October 29, 2026 18:03

@nicohrubec nicohrubec left a comment

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thanks for updating, lgtm

@isaacs
isaacs enabled stacked auto-merge (squash) October 30, 2026 19:08
@isaacs
isaacs merged commit d045e1c into develop Oct 30, 2026
398 of 399 checks passed
@isaacs
isaacs deleted the isaacschlueter/js-3989-guard-server-runtime-entries-against-pulling-in-build-time-guard branch October 30, 2026 21:08
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