Pamela Chia 5ce163fd69 feat(docs): add BreadcrumbList JSON-LD to guide pages (#45477)
## Summary

Emits `BreadcrumbList` JSON-LD on every `/docs/guides/*` page served by
`GuideTemplate`. Search engines and AI crawlers get an explicit
hierarchical signal for the docs site (the marketing site already
shipped JSON-LD via #45451). The chain prepends `Docs > Guides` to the
existing resolver output, so a page like `/docs/guides/auth/passwords`
produces a 5-level chain with the leaf URL set per Google's spec.

## Changes

- New `apps/docs/lib/breadcrumbs.ts`: pure pathname → chain resolver,
server-safe. Extracted from the existing client `useBreadcrumbs` hook so
the same logic runs in both contexts.
- New `apps/docs/lib/json-ld.ts`: `serializeJsonLd` +
`breadcrumbListSchema` mirroring `apps/www/lib/json-ld.ts`.
- `Breadcrumbs.tsx` (visual) now delegates to the shared resolver —
single source of truth for visual + SEO chains.
- `GuideTemplate` takes a required `pathname` prop and emits `<script
type="application/ld+json">` next to `<Breadcrumbs />`. Skipped when the
chain is empty (e.g., page not in nav menu). Middle items without URLs
(e.g., the "Auth" section root) omit `item`, matching the visual
breadcrumb.
- 8 explicit-prop callers updated; `[[...slug]]` callers already spread
`data` (which carries `pathname`).

## Scope

**Out of scope:**
- `/docs/reference/*` (SDK reference) — no breadcrumbs rendered today,
would need separate traversal over spec JSON.
- `/guides/troubleshooting/*` — uses its own template, not
`GuideTemplate`.
- `TechArticle` per-page schema — high maintenance for marginal value.

## Testing (Vercel preview)

```bash
curl -s https://<preview>/docs/guides/auth/passwords | grep -oE '<script type="application/ld\+json"[^>]*>[^<]+</script>'
```

Expect a script tag with the chain `Docs > Guides > Auth > Flows
(How-tos) > Password-based`, leaf URL
`https://supabase.com/docs/guides/auth/passwords`.

- [x] `/docs/guides/auth/passwords` — 5-item chain, leaf URL present
- [x] `/docs/guides/getting-started/features` — 4-item chain, all items
have URLs
- [x] `/docs/guides/getting-started/ai-prompts/<slug>` — special-case
chain (`Getting started > AI Tools > Prompts > <slug>`), leaf URL falls
back to pathname
- [x] `/docs/guides/database/database-advisors` (explicit-prop caller) —
chain renders
- [x] Visual breadcrumb on the same pages still renders correctly
- [ ] Validate output through [Google Rich Results
Test](https://search.google.com/test/rich-results) on a deployed preview
URL
- [x] `/docs/guides/troubleshooting/<slug>` — no JSON-LD emitted
(different template, intentional)

## Linear

- fixes GROWTH-820

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
* Added JSON-LD breadcrumb markup to guide pages to improve
search/discovery.

* **Improvements**
* Centralized breadcrumb generation for consistent, accurate breadcrumbs
across guides.
* Multiple guide pages updated to ensure breadcrumbs and page context
display correctly.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
2026-05-07 12:09:41 +08:00
2025-06-17 11:08:46 +02:00
2024-01-10 13:34:41 +01:00
2021-07-25 12:45:26 +08:00
2023-03-11 19:47:56 +01:00

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