Leaderboard/Buildwithfern

Buildwithfern

buildwithfern.com/learn
Score: 86 out of 100, grade B86
Grade B
Last checked: August 6, 2026 · afdocs v0.18.7 · Rerun
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Simulation: Fern // bud
Day 0
CategoryOther
Checks passed15/23Warnings2Failed3

Buildwithfern scores 86/100 (Grade B), passing 15 of 23 checks (65%). The documentation is broadly accessible to AI agents but has 5 areas that could be improved to better serve automated tooling.

# Agent Score Fix Report — Buildwithfern
URL: https://buildwithfern.com/learn
Score: 86/100 (Grade B)

I need help improving the AI-readiness of the documentation at https://buildwithfern.com/learn.
Agent Score found 3 failing checks and 2 warnings.

## Failing Checks (3)
- [content-discoverability] Llms Txt Directive Html: No llms.txt directive found in HTML of any of 10 sampled pages
- [markdown-availability] Content Negotiation: Server ignores Accept: text/markdown header (0/10 sampled pages return markdown)
- [page-size] Content Start Position: 9 of 10 sampled pages have content starting past 50% (worst 85%)

## Warnings (2)
- [content-discoverability] Llms Txt Valid: llms.txt contains parseable links but doesn't fully follow the proposed structure: https://buildwithfern.com/learn/llms.txt: No blockquote summary found
- [observability] Cache Header Hygiene: 1 of 12 endpoints have moderate cache lifetimes (1–24 hours)

## Fix Instructions

For each issue above, please:
1. Analyze the documentation site at https://buildwithfern.com/learn
2. Implement the specific fix
3. Verify the fix would cause the check to pass

### Common fixes:
- **No llms.txt**: Create /llms.txt following https://llmstxt.org — list all doc pages in markdown format
- **No .md URL support**: Configure your docs platform to serve pages at equivalent .md URLs (e.g. /docs/quickstart.md)
- **No content negotiation**: Return markdown when request includes Accept: text/markdown header
- **Large page size**: Reduce nav boilerplate, inline scripts, and repetitive markup
- **No sitemap**: Generate /sitemap.xml listing all documentation URLs
- **Auth walls**: Ensure docs pages return 200 without requiring login cookies or tokens
- **No Last-Modified header**: Configure your server/CDN to include Last-Modified response headers
- **Tab content hidden**: Ensure tabbed content is rendered in the HTML (not JS-only) so agents can read all variants

## Run afdocs Locally for More Detail

To get deeper visibility into what's failing, run afdocs against your docs:

  npx afdocs check https://buildwithfern.com/learn --fixes --verbose

- **--fixes**: Adds "Fix:" lines to the output for each warn/fail check with actionable remediation steps
- **-v, --verbose**: Shows per-page details (specific URLs, character counts, error codes) for checks with issues — useful for per-URL visibility into what's failing
CHECK RESULTS

How your docs scored

content-negotiationServer ignores Accept: text/markdown header (0/10 sampled pages return markdown)Learn more
markdown-url-support10/10 sampled pages support .md URLs (100%)Learn more
cache-header-hygiene1 of 12 endpoints have moderate cache lifetimes (1–24 hours)Learn more
markdown-content-parityAll 10 pages have equivalent markdown and HTML content (avg 0% missing)Learn more
llms-txt-coverageNo page URLs found in llms.txtLearn more
auth-gate-detectionAll 10 sampled pages are publicly accessibleLearn more
auth-alternative-accessAll docs pages are publicly accessible; no alternative access paths neededLearn more
llms-txt-directive-htmlNo llms.txt directive found in HTML of any of 10 sampled pagesLearn more
llms-txt-validllms.txt contains parseable links but doesn't fully follow the proposed structure: https://buildwithfern.com/learn/llms.txt: No blockquote summary foundLearn more
llms-txt-existsllms.txt found at 2 locations; using https://buildwithfern.com/learn/llms.txt as canonicalLearn more
llms-txt-sizellms.txt is 4,691 characters (under 50,000 threshold)Learn more
llms-txt-links-resolveAll 10 links are external and resolve (38 total links)Learn more
llms-txt-directive-mdllms.txt directive found in markdown of all 10 sampled pages, near the top of contentLearn more
llms-txt-links-markdownAll 38 links are external; cannot assess markdown supportLearn more
content-start-position9 of 10 sampled pages have content starting past 50% (worst 85%)Learn more
rendering-strategyAll 10 sampled pages contain server-rendered contentLearn more
page-size-markdownAll 10 pages under 50K chars (median 675, max 2K)Learn more
page-size-htmlAll 10 sampled pages under 50K chars (median 239K HTML → 11K markdown (95% boilerplate))Learn more
tabbed-content-serializationNo tabbed content detected across 10 sampled pagesLearn more
section-header-qualityNo tabbed content found; header quality check not applicableLearn more
markdown-code-fence-validityAll 6 code fences properly closed across 12 pagesLearn more
http-status-codesAll 10 sampled pages return proper error codes for bad URLsLearn more
redirect-behaviorNo redirects detected across 10 sampled pagesLearn more

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