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feat(node,bun,deno): Answer managed tunnel requests in the runtime - #25998

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awad/runtime-tunnel-node-bun-deno
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awad/runtime-tunnel-node-bun-deno

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@logaretm logaretm commented Nov 2, 2026 •

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This PR actually delivers the approach outlined in #25997 by hooking up the new utilities and wiring them up to the runtimes appropriately.

The implementation introduces a new integration factory that creates an integration for each runtime, it accepts a runtime-specific server patcher, and it applies the HTTP patch itself.

For Node.js / http module

For Node, and other runtimes that emit the http module's diagnostic channel, we patch the server emit and handle the request before it ever hits the user application.

For Deno / Bun

It does the same thing as in Node, but also adds a *.serve patch in-case the user is using the native runtime servers.

Note for reviewers: if you are lacking context on this PR, check #25997

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logaretm added this pull request to stack #26002 November 2, 2026 19:44
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size-limit report 📦

Compared: 14c7acb (PR test merge using develop at 6b4fa76)

Against: a1162e3 (develop) · base run #65032

⚠️ Baseline mismatch: 10 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 6b4fa76 finishes.

Path Size % Change Change
@sentry/browser 30.4 kB - -
@sentry/browser - with treeshaking flags 28.54 kB - -
@sentry/browser - with treeshaking flags tracing without tracing 28.43 kB - -
@sentry/browser (incl. Tracing) 52.73 kB - -
@sentry/browser (incl. Tracing + Span Streaming) 52.73 kB - -
@sentry/browser (incl. Tracing, Profiling) 55.7 kB - -
@sentry/browser (incl. Tracing, Replay) 93.03 kB - -
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags 81.63 kB - -
@sentry/browser (incl. Tracing, Replay with Canvas) 97.78 kB - -
@sentry/browser (incl. Tracing, Replay, Feedback) 110.77 kB - -
@sentry/browser (incl. Feedback) 47.98 kB - -
@sentry/browser (incl. sendFeedback) 35.5 kB - -
@sentry/browser (incl. FeedbackAsync) 40.61 kB - -
@sentry/browser (incl. Metrics) 31.44 kB - -
@sentry/browser (incl. Logs) 31.73 kB - -
@sentry/browser (incl. Metrics & Logs) 32.45 kB - -
@sentry/react 32.29 kB - -
@sentry/react (incl. Tracing) 55.1 kB - -
@sentry/vue 38.67 kB - -
@sentry/vue (incl. Tracing) 55.75 kB - -
@sentry/svelte 30.43 kB - -
@sentry/remix (Remix 3 client bundle) 57.82 kB - -
CDN Bundle 32.19 kB - -
CDN Bundle (incl. Tracing) 53.26 kB - -
CDN Bundle (incl. Logs, Metrics) 34.47 kB - -
CDN Bundle (incl. Tracing, Logs, Metrics) 55.2 kB - -
CDN Bundle (incl. Replay, Logs, Metrics) 75.88 kB - -
CDN Bundle (incl. Tracing, Replay) 91.47 kB - -
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) 93.4 kB - -
CDN Bundle (incl. Tracing, Replay, Feedback) 97.58 kB - -
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) 99.58 kB - -
CDN Bundle - uncompressed 94.67 kB - -
CDN Bundle (incl. Tracing) - uncompressed 157.67 kB - -
CDN Bundle (incl. Logs, Metrics) - uncompressed 101.14 kB - -
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed 163.41 kB - -
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed 232.71 kB - -
CDN Bundle (incl. Tracing, Replay) - uncompressed 279.36 kB - -
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed 285.08 kB - -
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed 293.06 kB - -
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed 298.77 kB - -
@sentry/nextjs (client) 58.05 kB - -
@sentry/sveltekit (client) 53.24 kB - -
@sentry/core/server 44.48 kB +0.53% +233 B 🔺
@sentry/core/browser 13.93 kB - -
@sentry/node 156.24 kB +0.2% +301 B 🔺
@sentry/node/import (ESM hook with diagnostics-channel injection) 82.28 kB +0.01% +1 B 🔺
@sentry/node - without tracing 97.16 kB +0.28% +263 B 🔺
@sentry/node - without channel injection 136.55 kB +0.21% +274 B 🔺
@sentry/aws-serverless 105.39 kB +0.28% +294 B 🔺
@sentry/cloudflare (withSentry) - minified 201.54 kB +0.44% +869 B 🔺
@sentry/cloudflare (withSentry) 500.79 kB +0.35% +1.74 kB 🔺
@sentry/nextjs/cloudflare (withSentry) - minified 222.09 kB +0.4% +869 B 🔺

View base workflow run

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Optional E2E tests

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@logaretm
logaretm force-pushed the awad/runtime-tunnel-node-bun-deno branch 5 times, most recently from 86e706c to 0a00c73 Compare November 3, 2026 04:28
@logaretm
logaretm marked this pull request as ready for review November 3, 2026 04:53
@logaretm
logaretm requested review from a team as code owners November 3, 2026 04:53
@logaretm
logaretm requested review from Lms24, andreiborza, isaacs, msonnb, nicohrubec and s1gr1d and removed request for a team November 3, 2026 04:53
`serveTunnelIntegration` answers tunnel requests on every `node:http` server (through the
`http.server.request.start` diagnostics channel), `Bun.serve` and `Deno.serve` before the app sees them.
TanStack Start's `init` installs the hooks itself, since `tunnelRoute` enables the tunnel after `init`.

Every runtime gets the same set of malformed and hostile requests, to prove the app keeps working.
@logaretm
logaretm force-pushed the awad/runtime-tunnel-node-bun-deno branch from ff78a0d to a92ac02 Compare November 4, 2026 17:25

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

Fix All in Cursor

❌ Bugbot Autofix is OFF. To automatically fix reported issues with cloud agents, enable autofix in the Cursor dashboard.

Reviewed by Cursor Bugbot for commit a92ac02. Configure here.

instrumentTunnelServers();
instrumentRuntimeServers?.();
}
},

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First intercept false skips patching

Low Severity

setupOnce only installs the HTTP / runtime patches when that first ServeTunnel instance has intercept other than false. setupOnce runs once per integration name, so a later client or addIntegration call with intercept enabled never patches servers. Tunnel requests then fall through to the app even though that client turned intercept on.

Fix in Cursor Fix in Web

Reviewed by Cursor Bugbot for commit a92ac02. Configure here.

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