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feat(tanstackstart-react): Serve the managed tunnel from the server entry - #25408

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logaretm wants to merge 12 commits into
awad/tunnel-browser-managedfrom
awad/tunnel-tanstackstart
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logaretm wants to merge 12 commits into
awad/tunnel-browser-managedfrom
awad/tunnel-tanstackstart

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@logaretm logaretm commented Oct 15, 2026 •

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TanStack Start picked a random tunnel path per build and patched the generated route tree to serve it.

Because the new approach relies less on build-time, the logic was changed to wrap the server entrypoint instead and only route the matching tunnel requests to our handler.

This isn't a breaking change, previously we injected a single endpoint handler, now we inject a middleware since the DSN is only known at runtime.

The base path comes from router.basepath (or Vite's base), and the tunnel-basepath e2e variants cover it in both dev and prod.

For reviewers: if you need an overview of what this is, refer to #25199.

closes #25461

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logaretm added this pull request to stack #25201 October 15, 2026 15:13
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size-limit report 📦

Compared: 287ad6a (PR test merge using develop at f9f8adc)

Against: ca4fc32 (develop) · base run #62950

⚠️ Baseline mismatch: 49 develop commit(s) in the PR build are missing from the baseline. Their size changes also affect this comparison. Compare commits. Re-run once develop's baseline build for f9f8adc finishes.

Path Size % Change Change
@sentry/browser 30.56 kB +2.18% +651 B 🔺
@sentry/browser - with treeshaking flags 28.54 kB +1.76% +491 B 🔺
@sentry/browser - with treeshaking flags tracing without tracing 28.42 kB +1.69% +470 B 🔺
@sentry/browser (incl. Tracing) 52.8 kB +1.35% +702 B 🔺
@sentry/browser (incl. Tracing + Span Streaming) 52.8 kB +1.35% +699 B 🔺
@sentry/browser (incl. Tracing, Profiling) 55.77 kB +1.31% +720 B 🔺
@sentry/browser (incl. Tracing, Replay) 92.47 kB +0.68% +621 B 🔺
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags 81.21 kB +0.61% +492 B 🔺
@sentry/browser (incl. Tracing, Replay with Canvas) 97.21 kB +0.66% +633 B 🔺
@sentry/browser (incl. Tracing, Replay, Feedback) 110.2 kB +0.63% +687 B 🔺
@sentry/browser (incl. Feedback) 48.12 kB +1.49% +703 B 🔺
@sentry/browser (incl. sendFeedback) 35.63 kB +1.9% +664 B 🔺
@sentry/browser (incl. FeedbackAsync) 40.76 kB +1.71% +684 B 🔺
@sentry/browser (incl. Metrics) 31.57 kB +2.05% +634 B 🔺
@sentry/browser (incl. Logs) 31.84 kB +2.02% +629 B 🔺
@sentry/browser (incl. Metrics & Logs) 32.52 kB +2.12% +673 B 🔺
@sentry/react 32.37 kB +1.99% +630 B 🔺
@sentry/react (incl. Tracing) 55.05 kB +1.17% +635 B 🔺
@sentry/vue 38.71 kB +1.7% +646 B 🔺
@sentry/vue (incl. Tracing) 55.75 kB +1.3% +715 B 🔺
@sentry/svelte 30.59 kB +2.2% +656 B 🔺
@sentry/remix (Remix 3 client bundle) 57.84 kB +1.27% +722 B 🔺
CDN Bundle 32.14 kB +1.5% +474 B 🔺
CDN Bundle (incl. Tracing) 53.09 kB +0.92% +480 B 🔺
CDN Bundle (incl. Logs, Metrics) 34.34 kB +1.4% +471 B 🔺
CDN Bundle (incl. Tracing, Logs, Metrics) 55.04 kB +0.89% +484 B 🔺
CDN Bundle (incl. Replay, Logs, Metrics) 75.29 kB +0.67% +499 B 🔺
CDN Bundle (incl. Tracing, Replay) 90.75 kB +0.53% +476 B 🔺
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) 92.69 kB +0.52% +479 B 🔺
CDN Bundle (incl. Tracing, Replay, Feedback) 96.89 kB +0.49% +470 B 🔺
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) 98.86 kB +0.5% +486 B 🔺
CDN Bundle - uncompressed 94.44 kB +1.24% +1.15 kB 🔺
CDN Bundle (incl. Tracing) - uncompressed 157.29 kB +0.74% +1.15 kB 🔺
CDN Bundle (incl. Logs, Metrics) - uncompressed 100.99 kB +1.16% +1.15 kB 🔺
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed 163.26 kB +0.72% +1.15 kB 🔺
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed 231.03 kB +0.51% +1.15 kB 🔺
CDN Bundle (incl. Tracing, Replay) - uncompressed 277.46 kB +0.42% +1.15 kB 🔺
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed 283.42 kB +0.41% +1.15 kB 🔺
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed 291.16 kB +0.4% +1.15 kB 🔺
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed 297.11 kB +0.39% +1.15 kB 🔺
@sentry/nextjs (client) 57.91 kB +1.05% +601 B 🔺
@sentry/sveltekit (client) 53.11 kB +1.21% +634 B 🔺
@sentry/core/server 43.52 kB +4.13% +1.73 kB 🔺
@sentry/core/browser 13.81 kB - -
@sentry/node 153.29 kB +0.44% +662 B 🔺
@sentry/node/import (ESM hook with diagnostics-channel injection) 81.58 kB - -
@sentry/node - without tracing 94.9 kB +0.69% +649 B 🔺
@sentry/node - without channel injection 133.92 kB +0.47% +616 B 🔺
@sentry/aws-serverless 103.15 kB +0.7% +710 B 🔺
@sentry/cloudflare (withSentry) - minified 213.13 kB +0.96% +2.02 kB 🔺
@sentry/cloudflare (withSentry) 528.73 kB +0.94% +4.9 kB 🔺
@sentry/nextjs/cloudflare (withSentry) - minified 232.75 kB +0.88% +2.01 kB 🔺

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@logaretm
logaretm force-pushed the awad/tunnel-tanstackstart branch from 2202cda to 46e486c Compare October 15, 2026 15:36
@logaretm
logaretm force-pushed the awad/tunnel-tanstackstart branch 3 times, most recently from 9069686 to b589186 Compare October 15, 2026 17:15
@logaretm
logaretm force-pushed the awad/tunnel-tanstackstart branch 3 times, most recently from a5fcc1b to f2a6beb Compare October 15, 2026 18:16
@logaretm
logaretm force-pushed the awad/tunnel-tanstackstart branch 2 times, most recently from 722f4c6 to eec9ddf Compare October 15, 2026 18:28
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logaretm force-pushed the awad/tunnel-tanstackstart branch from eec9ddf to 8d3dee9 Compare October 16, 2026 01:51
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@logaretm
logaretm force-pushed the awad/tunnel-tanstackstart branch from 8d3dee9 to 8c6c1fa Compare October 16, 2026 02:25
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logaretm force-pushed the awad/tunnel-tanstackstart branch 2 times, most recently from 6b24a7b to 64c909f Compare October 16, 2026 14:00
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logaretm requested review from a team as code owners October 19, 2026 20:07
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logaretm requested review from JPeer264, Lms24, isaacs and mydea and removed request for a team October 19, 2026 20:07
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logaretm force-pushed the awad/tunnel-tanstackstart branch from 58c71ae to cdbac44 Compare October 19, 2026 20:08

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Cursor Bugbot has reviewed your changes and found 1 potential issue.

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Comment thread packages/tanstackstart-react/test/vite/tunnelRoute.test.ts
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One or more gzipped bundles increased by more than 500 bytes. If this increase is intentional, add the Accept Bundlesize Increase label to this PR to rerun and accept the check.

…ntry

The Vite plugin now wraps the app's server entry, so `Sentry.init({ tunnel: true })`
works with no build option and tunnel requests are answered before Start's
request middleware and routing. Every `tunnelRoute` form is served the same way:
`true` uses the DSN-derived path instead of a random one per build, and a static
path no longer patches the generated route tree.
…equests

The tunnel handler now answers a request without one with a 411.
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👋 @isaacs, @mydea, @Lms24, @JPeer264, @chargome, @s1gr1d — Please review this PR when you get a chance!

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TanStack Start managed tunnel

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