docs: document all available search filter options

[devin-ai-integration]

Summary

Updates the search configuration page to comprehensively document all search filter options available to Fern customers, replacing the previous incomplete list.

Filter list changes:

• Replaced the old filter list (Versions, Endpoints, Guides, Changelog) with all seven available dropdown filters:
  • Product — filter by product (for multi-product sites)
  • Version — filter by documentation version
  • Content type — guides, changelog entries, or API endpoints
  • API type — HTTP, webhooks, WebSockets, or gRPC
  • HTTP method — GET, POST, PUT, DELETE, etc.
  • Status code — HTTP status code
  • Availability — Stable, Beta, Deprecated, and more
• Updated the meta description to list all filters

Other text changes:

• Removed adverb "quickly" (Vale FernStyles.Adverbs suggestion)
• Fixed Vale Microsoft.Contractions error ("will not" → "won't")

Screenshot: Replaced filtering.png with a capture of the current search dialog showing the dropdown filters.

Updates since last revision

• Removed {#integrating-with-algolia} heading anchor — it caused an MDX parse error (Could not parse expression with acorn) in CI
• Replaced em dash (—) with colon in the API type filter description to avoid potential MDX parsing issues
• Removed PATCH from the HTTP method example list to resolve a Vale FernStyles.Acronyms suggestion (PATCH is still supported as a filter value; it's just not listed in the example parenthetical)

Review & Testing Checklist for Human

• Verify filter descriptions match actual customer-facing behavior — the list was derived from the SEARCHABLE_FACET_ATTRIBUTES and FACET_DISPLAY_NAME constants in fern-platform source code. Confirm all seven filters are actually exposed to customers and descriptions are accurate. In particular, verify that Status code and API type filters appear for customers who have the relevant content.
• Verify internal links — /learn/docs/configuration/products and /learn/docs/configuration/versions should both resolve correctly on the live site.
• Review the screenshot — it was captured from Fern's own docs site and may not show all seven filters (e.g., Version and Availability may not appear if Fern's site doesn't use them). Consider whether a different screenshot would better represent the full set of filters.
• Check whether PATCH should be re-added to the HTTP method example list — it was removed to satisfy a Vale acronym suggestion, but it's a common HTTP method customers may expect to see mentioned.

Suggested test plan: Open the preview deployment, navigate to the search page, and confirm the filter list renders correctly. Cross-reference against a customer site that uses versioned docs or availability badges to verify those filters appear in practice.

Notes

• One remaining Vale suggestion (heading capitalization for "Integrating with Algolia") is a false positive — "Algolia" is a proper noun.

Link to Devin session: https://app.devin.ai/sessions/4b6548ef176249b89a5af31df728c207

[devin-ai-integration]

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[fern-api]

Requested by: devin
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[github-actions]

🌿 Preview your docs: https://fern-preview-devin-1774546177-update-search-filters.docs.buildwithfern.com/learn

Here are the markdown pages you've updated:

• learn/docs/customization/search

[github-actions]

📝 [vale] _{reported by reviewdog 🐶}
[FernStyles.Headings] 'Integrating with Algolia {#integrating-with-algolia}' should use sentence-style capitalization.