[tannerlinsley]

A healthy guide without a frontmatter title currently gets a visible “Content temporarily unavailable” heading and the same error text in its page title, even while its full Markdown body renders. This is reproducible on /router/latest/docs/how-to/setup-testing, whose upstream document starts with an H1 and has no frontmatter.

Preserve explicit frontmatter titles, otherwise derive the title from an H1 using the existing site Markdown parser. Documents with no H1 use “Documentation”; genuine temporary-unavailable fallback Markdown keeps its unavailable heading. This avoids mistaking headings inside code fences for page titles and handles inline formatting.

Focused tests cover explicit titles, missing metadata, formatted headings, fenced examples, genuine fallback content and documents without headings. The production response was captured before the fix. Full preview verification is pending. This addresses one cause of unhealthy metadata under #1153, which remains open for the broader sitemap contract.

Normal commit hooks passed formatting, TypeScript, lint, 689 unit tests, 2,278 chat tests and 20 desktop tests, with 5, 6 and 1 skipped respectively.

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Latest commit: 0b6deeb

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Status	Name	Latest Commit	Preview URL	Updated (UTC)
✅ Deployment successful! View logs	tanstack-com	0b6deeb	Commit Preview URL Branch Preview URL	Nov 01 2026, 05:39 AM

[tannerlinsley]

The real guide title now appears on the exact commit preview.

AI review notes:
On 0b6deeb, https://516017d1-tanstack-com.thetanstack.workers.dev/router/latest/docs/how-to/setup-testing returned HTTP 200 with the title “How to Set Up Testing with Code-Based Routing | TanStack Router Docs”, its matching production canonical, and no “Content temporarily unavailable” text. The guide body still renders. Local tests separately cover explicit metadata, formatted headings, fenced examples and genuine unavailable fallback content. Required team review remains outstanding; this is not a production claim.

[tannerlinsley]

The broader preview check also clears the remaining public-document title failures from the earlier sitemap audit.

AI review notes:
Checked all 10 remaining document URLs after separating contributing notes and the internal Devtools specification. On the exact 0b6deeb preview, each returns HTTP 200 with a matching production canonical and no unavailable/error heading. Preview responses carry the host's noindex header, so this is not a production indexing pass.

Nine pages get their Markdown heading as the title. The Svelte migration guide uses the generic Documentation fallback because its upstream file has neither title metadata nor an H1; its 2,737-byte source contains the actual migration guide, so it should remain available rather than being treated as a missing page. Required team review still applies.