Leaderboard/Supabase

Supabase

supabase.com/docs
Score: 75 out of 100, grade C75
Grade C
Last checked: April 11, 2026 · Rerun · Request listing
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Simulation: Fern // bud
Day 0
CategoryCloud Infra
Checks passed10/22Warnings3Failed8

Supabase scores 75/100 (Grade C), passing 10 of 22 checks (45%). The documentation is broadly accessible to AI agents but has 11 areas that could be improved to better serve automated tooling.

# Agent Score Fix Report — Supabase
URL: https://supabase.com/docs
Score: 75/100 (Grade C)

I need help improving the AI-readiness of the documentation at https://supabase.com/docs.
Agent Score found 8 failing checks and 3 warnings.

## Failing Checks (8)
- [content-discoverability] Llms Txt Directive: No llms.txt directive found in any of 10 sampled pages
- [page-size] Rendering Strategy: 1 of 10 sampled pages appear to be client-side rendered SPA shells (__next detected); agents using HTTP fetches will see no content; 1 more have page structure but little substantive content
- [page-size] Page Size Html: 6 of 10 sampled pages convert to over 100K chars (max 1165K, 50% boilerplate)
- [page-size] Content Start Position: 3 of 10 sampled pages have content starting past 50% (worst 100%)
- [content-structure] Section Header Quality: 2 of 2 page(s) with tab headers don't distinguish between variants (e.g. "response" repeats across 21 tab groups)
- [url-stability] Http Status Codes: 3 of 9 sampled pages return 200 for non-existent URLs (soft 404); 1 failed to fetch
- [observability] Llms Txt Freshness: llms.txt covers 440/2022 sitemap doc pages (22%); 1582 missing; 114 llms.txt links not in sitemap (may indicate stale links or incomplete sitemap)
- [observability] Markdown Content Parity: 1 of 4 pages have substantive content differences between markdown and HTML (avg 14% missing)

## Warnings (3)
- [content-discoverability] Llms Txt Valid: llms.txt contains parseable links but doesn't fully follow the proposed structure: https://supabase.com/docs/llms.txt: No blockquote summary found, No heading-delimited sections found; https://supabase.com/llms.txt: No blockquote summary found, No heading-delimited sections found
- [markdown-availability] Markdown Url Support: 4/10 sampled pages support .md URLs (40%); inconsistent support
- [markdown-availability] Content Negotiation: Content negotiation partially supported: 4 correct type, 0 wrong type, 6 HTML only

## Fix Instructions

For each issue above, please:
1. Analyze the documentation site at https://supabase.com/docs
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://supabase.com/docs --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

rendering-strategy1 of 10 sampled pages appear to be client-side rendered SPA shells (__next detected); agents using HTTP fetches will see no content; 1 more have page structure but little substantive contentLearn more
page-size-html6 of 10 sampled pages convert to over 100K chars (max 1165K, 50% boilerplate)Learn more
content-start-position3 of 10 sampled pages have content starting past 50% (worst 100%)Learn more
page-size-markdownAll 4 pages under 50K chars (median 15K, max 27K)Learn more
llms-txt-freshnessllms.txt covers 440/2022 sitemap doc pages (22%); 1582 missing; 114 llms.txt links not in sitemap (may indicate stale links or incomplete sitemap)Learn more
markdown-content-parity1 of 4 pages have substantive content differences between markdown and HTML (avg 14% missing)Learn more
cache-header-hygieneAll 12 endpoints have appropriate cache headersLearn more
markdown-url-support4/10 sampled pages support .md URLs (40%); inconsistent supportLearn more
content-negotiationContent negotiation partially supported: 4 correct type, 0 wrong type, 6 HTML onlyLearn more
http-status-codes3 of 9 sampled pages return 200 for non-existent URLs (soft 404); 1 failed to fetchLearn more
redirect-behaviorAll 1 redirect(s) across 10 sampled pages are same-host HTTP redirectsLearn 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
section-header-quality2 of 2 page(s) with tab headers don't distinguish between variants (e.g. "response" repeats across 21 tab groups)Learn more
tabbed-content-serialization60 tab group(s) across 3 of 10 sampled pages; all serialize under 50K charsLearn more
markdown-code-fence-validityAll 109 code fences properly closed across 6 pagesLearn more
llms-txt-directiveNo llms.txt directive found in any of 10 sampled pages
llms-txt-validllms.txt contains parseable links but doesn't fully follow the proposed structure: https://supabase.com/docs/llms.txt: No blockquote summary found, No heading-delimited sections found; https://supabase.com/llms.txt: No blockquote summary found, No heading-delimited sections foundLearn more
llms-txt-existsllms.txt found at 2 location(s)Learn more
llms-txt-sizellms.txt is 546 characters (under 50,000 threshold)Learn more
llms-txt-links-resolveAll 8 same-origin links resolve (8 total links)Learn more
llms-txt-links-markdown8/8 same-origin links point to markdown content (100%)Learn more

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