docs(android): Harmonize Android Navigation and Jetpack Compose docs

[0xadam-brown]

DESCRIBE YOUR PR

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PR moves navigation-specific content from the Android Jetpack Compose page to the corresponding Navigation page. It also refines the Navigation page for consistency and correctness.

Work is a follow-up to the Nav3 docs recently introduced in #19804.

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PRE-MERGE CHECKLIST

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• Checked Vercel preview for correctness, including links
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LEGAL BOILERPLATE

Look, I get it. The entity doing business as "Sentry" was incorporated in the State of Delaware in 2015 as Functional Software, Inc. and is gonna need some rights from me in order to utilize my contributions in this here PR. So here's the deal: I retain all rights, title and interest in and to my contributions, and by keeping this boilerplate intact I confirm that Sentry can use, modify, copy, and redistribute my contributions, under Sentry's choice of terms.

EXTRA RESOURCES

• Sentry Docs contributor guide

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Project	Deployment	Actions	Updated
sentry-docs	Ready	Preview	Oct 8, 2026 9:20am UTC

1 Skipped Deployment

Project	Deployment	Actions	Updated
develop-docs	Ignored	Preview	Oct 8, 2026 9:20am UTC

[cursor]

The plan checks full page loads and in-app navigations on the two rewritten Android pages. It also checks client errors on those pages and on sibling Android integration pages. An issue escalates when those pages stop loading or client errors rise.

Services: sentry-docs.

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

Plan

What changed

Readers of the Jetpack Compose page no longer see Navigation install steps. That page now links to the Navigation page for that setup. Readers of the Navigation page now see Jetpack Compose Navigation 2 install, configure, and verify steps. Navigation 3 now records five back-stack entries instead of ten.

The change is live after sentry-docs deploys. These MDX files are product docs. They do not ship on develop-docs.

Risk

Broken MDX can fail static generation or page render. Readers then miss the page. The old Compose heading jetpack-compose-navigation is gone. Hash links to that heading will not find a section. The Navigation page grew a lot. A slow first load is more likely.

Intended effect

Both pages keep serving after deploy. Sampled page load and navigation spans on those URLs stay above zero.

absent looks like this: either URL has zero sampled page load and navigation spans while other docs pages still load. Telemetry cannot prove the moved prose is correct.

Traces use a 30% sample rate. Counts below are sampled spans, not full traffic.

Signal	Baseline	Rule	Source
Compose page load spans	20 spans. Duration p75-p95 3069-6268ms. Window 2026-10-01T09:07:19Z to 2026-10-08T09:07:19Z	Volume must stay above zero. Duration should stay in 3069-6268ms	Sentry sentry/docs, production, span.op:pageload, http.url:*platforms/android/integrations/jetpack-compose*
Compose navigation spans	43 spans. Duration p75-p95 1001-6977ms. Same window	Volume must stay above zero. Duration should stay in 1001-6977ms	Sentry sentry/docs, production, span.op:navigation, http.url:*platforms/android/integrations/jetpack-compose*
Navigation page load spans	17 spans. Duration p75-p95 9990-14429ms. Same window	Volume must stay above zero. This duration band is from a small sample and may be noisy	Sentry sentry/docs, production, span.op:pageload, http.url:*platforms/android/integrations/navigation*
Navigation navigation spans	13 spans. Duration p75-p95 521-638ms. Same window	Volume must stay above zero. Duration should stay in 521-638ms	Sentry sentry/docs, production, span.op:navigation, http.url:*platforms/android/integrations/navigation*

Regression watch

This diff can break render of these two pages or sibling Android integration pages. Watch client errors on those URLs. Watch page load duration on the larger Navigation page.

Signal	Baseline	Rule	Source
Client errors on the two pages	3 events in 7d. Titles: 2 Event: Event \Event` (type=error) captured as promise rejection, 1 TypeError: Cannot read properties of undefined (reading 'h6')`. Window 2026-10-01T09:07:19Z to 2026-10-08T09:07:19Z	A matching 7d window should stay in 0-3 events. Rise above 3 is a regression. New titles also count	Sentry sentry/docs, production, url:*platforms/android/integrations/jetpack-compose* OR url:*platforms/android/integrations/navigation*
Client errors on sibling Android integration pages	16 events in 7d. Same window	A matching 7d window should stay in 0-16 events. Rise above 16 is a regression	Sentry sentry/docs, production, url:*platforms/android/integrations/*
Navigation page load duration	p75-p95 9990-14429ms from 17 sampled spans. Same window	p95 should not rise above 14429ms. If it does, inspect render of the longer Navigation page	Sentry sentry/docs, production, span.op:pageload, http.url:*platforms/android/integrations/navigation*

Not observable

Whether the moved install snippets are correct. Whether old hash links to jetpack-compose-navigation still help readers. LCP for these URLs. A 7d measurements.lcp query returned no points. Out-of-repo inbound links to the old Compose Navigation section.