docs(remix): Update the Remix 3 page for Remix 3.0.0

[chargome]

DESCRIBE YOUR PR

Follow-up to #19773, which is already merged. Updates the Remix 3 alpha page for Remix 3.0.0:

• The install step asks for Remix 3.0.0 or later instead of remix@3.0.0-rc.1.
• The browser entry imports run from remix/component, since 3.0.0 renamed @remix-run/ui to @remix-run/component.

Nothing else changes. The import map setup (getScriptEntry, <ImportMap>) that 3.0.0 requires is a Remix change every app makes and is documented by Remix, so it stays out of this page, which only shows the Sentry additions. The server snippet, the asset server snippet and the upload section are unchanged.

Stays a draft until the SDK alpha with the 3.0.0 fix is published. Refs getsentry/sentry-javascript#25008.

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• Checked Vercel preview for correctness, including links
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[vercel]

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Project	Deployment	Actions	Updated
sentry-docs	Ready	Preview	Oct 2, 2026 3:50pm UTC

1 Skipped Deployment

Project	Deployment	Actions	Updated
develop-docs	Ignored		Oct 2, 2026 3:50pm UTC

[linear-code]

JS-3777

[cursor]

The plan checks Remix 3 page loads, sibling Remix guide loads, JavaScript-platform 404s, and missing-file logs. An issue escalates when the Remix 3 page stops loading, 404s rise, or those logs appear.

Services: sentry-docs.

Mention @change-monitor in a comment to update the plan.

Plan

What changed

The Remix 3 setup page now requires Remix 3.0.0 or later.
The browser entry snippet now imports run from remix/component.
sentry-docs must deploy before this page is live.

Risk

Readers who copy the snippet can call a Remix API that no longer exists.
A compile miss can 404 this page or nearby JavaScript platform routes.
Shared app code did not change.

Intended effect

This docs text change has no queryable intended effect.
No signal records the new version line or the remix/component import.
absent is the state until a person reads those two strings on the live page.

Regression watch

This diff can drop the Remix 3 page or other JavaScript platform routes.
Page-load traces collapse to /:path*?, so use the docs.page.load path attribute.
All Remix 3 loads in the last 7 days fell in the last 24 hours. Treat a quiet window as unknown, not as a 404, unless the Remix index still has loads.

Signal	Baseline	Rule	Source
Remix 3 page loads (docs.page.load counter, path:/platforms/javascript/guides/remix/remix-3/)	3 loads in 2026-10-01T15:44:22Z to 2026-10-02T15:44:22Z. Same 3 loads in 2026-09-25T15:44:22Z to 2026-10-02T15:44:22Z. Pair with Remix index loads in the same window.	Hold near 3 loads per 24h when the index also has loads. detected if this path is 0 and the index is not.	Sentry sentry / docs
Remix index page loads (docs.page.load counter, path:/platforms/javascript/guides/remix/)	3 loads in 2026-10-01T15:44:22Z to 2026-10-02T15:44:22Z. 40 loads in 2026-09-25T15:44:22Z to 2026-10-02T15:44:22Z, about 5-6 per day.	Hold in the 3-6 loads per 24h band. detected if 24h count is 0.	Sentry sentry / docs
JavaScript platform 404s (docs.page.not_found counter, requested_path:platforms/javascript)	38 in 2026-10-01T15:44:22Z to 2026-10-02T15:44:22Z. 408 in 2026-09-25T15:44:22Z to 2026-10-02T15:44:22Z, about 58 per day.	Hold in the 38-58 per 24h band. detected if 24h count rises above 58.	Sentry sentry / docs
MDX missing-file logs (message:"*MDX file not found at runtime*")	0 events in 2026-09-25T15:44:22Z to 2026-10-02T15:44:22Z.	Hold at 0. detected if any event appears.	Sentry sentry / docs logs

If 404s rise, check whether /platforms/javascript/guides/remix/remix-3/ is missing from the deploy.

Not observable

The live HTML still showing remix@3.0.0-rc.1 or import { run } from "remix/ui".
Whether copied snippets fail in reader apps.
Pageload or error events tagged with this URL. The transaction name is /:path*?. A url:*remix-3* error search returned 0.