Agent Ready HTML

Zensical (and Material for MkDocs): vendor profile

In short

Zensical, from the team behind Material for MkDocs, writes llms.txt and markdown copies only for projects that configure its llmstxt plugin block, and the copies cover only the chosen pages. Material for MkDocs reaches end of life on 2027-05-05. zensical.org served /docs/llms.txt at 4,109 bytes on 2026-11-05. Studio is free; Studio Pro is 19 USD a month.

At a glance

standards.txt zensical

llms-txt               = partial
markdown-negotiation   = no statement
markdown-twin          = partial
initial-html           = supports
real-404               = no statement
vary-accept            = no statement

1 supports, 2 partial or announced, 3 no statement.

Zensical Framework

Rust-based static site generator from the Material for MkDocs team that builds mkdocs.yml projects to static HTML, writes llms.txt plus Markdown copies through its llmstxt plugin support, and replaces Material for MkDocs (end of life 2027-05-05).

Type
Framework
Operator, as the facts below state it
Zensical LLC
Home page
zensical.org, answered HTTP 200 on 2026-11-05
Last read
5 November 2026

What it does for this layer

  • The Material for MkDocs team announced Zensical on 2025-11-05 as its own static site generator, built to get past the technical limits of MkDocs. [primary source, 2025-11-05] source, read 5 November 2026.
  • Zensical's team page says the stack is written from first principles in Rust by the people behind Material for MkDocs and mkdocstrings. [primary source] source, read 5 November 2026.
  • zensical build writes a self-contained static site from Markdown that needs no database or server and can sit on GitHub Pages or any CDN. [primary source] source, read 5 November 2026.
  • Zensical reads an existing mkdocs.yml, keeps the standard MkDocs project layout and recognizes the configuration of supported MkDocs plugins. [primary source] source, read 5 November 2026.
  • Zensical's llmstxt support ignores the plugin's Python preprocess hook, and full_output (an optional llms-full style file) must be a relative path inside site_dir. [primary source] source, read 5 November 2026.
  • Adding content.action.copy to the Zensical theme features shows a Copy as Markdown button on every page that has a Markdown copy. [primary source] source, read 5 November 2026.
  • Zensical's roadmap lists the MkDocs llmstxt plugin replacement under Now available, described as publishing an llms.txt index and Markdown exports. [primary source] source, read 5 November 2026.
  • Zensical ships its own client-side search engine, on by default and usable offline, which the team plans to release as a standalone open source project in 2026. [primary source] source, read 5 November 2026.
  • Zensical's site_url setting holds the canonical URL written into each page's HTML header and should be set unless the build is meant for offline use. [primary source] source, read 5 November 2026.
  • Zensical 0.0.74, released on GitHub on 2026-10-30, added support for the optimize plugin and fixed llms.txt output so images with URLs survive. [primary source, 2026-10-30] source, read 5 November 2026.
  • Material for MkDocs 9.8.0, released on 2026-10-24, states the theme reaches end of life on 2027-05-05, with only critical fixes and security updates until then. [primary source, 2026-10-24] source, read 5 November 2026.
  • Material for MkDocs entered maintenance mode on 2025-11-11 with 9.7.0, which opened every former Insiders feature to all users. [primary source, 2025-11-11] source, read 5 November 2026.
  • Zensical Studio editions launched on 2026-11-05 at standard prices; Studio is free, Studio Pro costs 19 USD a month or 179 USD a year, and Studio Team costs 39 USD per seat a month. [primary source, 2026-11-05] source, read 5 November 2026.
  • Zensical Spark for organizations costs 399 USD a month or 3,999 USD a year with a two-business-day initial-response SLA; Spark Private starts at 7,499 USD a year. [primary source, 2026-11-05] source, read 5 November 2026.
  • zensical.org served /docs/llms.txt (4,109 bytes) and a text/markdown copy at /docs/get-started/index.md on 2026-11-05, but answered Accept: text/markdown on the page URL with HTML and no Vary header. [observed] source, read 5 November 2026.
  • A made-up path on zensical.org first got a 302 to the same path with a trailing slash and only then a 404 on 2026-11-05; /llms.txt at the site root redirected the same way. [observed] source, read 5 November 2026.

Products and plans

Plans and prices as the vendor's own pages showed them on the date read.
ProductWhat it isPriceAs ofSource
ZensicalStatic site generator compatible with MkDocs and Material for MkDocs projects.Free, open source
MIT licence, free; version 0.0.74 on 2026-10-30		2026-11-05source
Material for MkDocsMkDocs theme in maintenance mode until end of life on 2027-05-05.Free, open source
MIT licence, free; 9.8.0 on 2026-10-24		2026-11-05source
Zensical Studio ProVS Code authoring environment with project-wide refactoring for Zensical and MkDocs projects.From USD 19
per month, or 179 USD a year; Studio is free and Studio Team is 39 USD per seat a month		2026-11-05source
Zensical SparkPaid membership with direct support and early access for organizations.From USD 399
Spark for organizations per month plus tax; Spark Community for individuals is 9 USD a month		2026-11-05source

Standards

The six standards this site tracks; no statement means the pages read said nothing.
StandardStatusWhat the vendor's pages saySource
llms-txtpartialZensical generates llms.txt when the mkdocs-llmstxt plugin configuration, including its required sections list, is present.source
markdown-negotiationno statementNo statement found in the Zensical create, publish, basics, search and plugin compatibility pages; zensical.org returned HTML to Accept: text/markdown.none
markdown-twinpartialThe llmstxt support writes Markdown copies of the selected pages only.source
initial-htmlsupportszensical build writes a static site from Markdown files that is completely self-contained.source
real-404no statementNo statement found in the Zensical docs pages read; zensical.org/docs/ returned 404 for a made-up path while the site root first redirected with 302.none
vary-acceptno statementNo statement found in the Zensical docs pages read; zensical.org sent no Vary header.none

Checks on its own site

Readings of zensical.org, the vendor's own website, which describe that site and not the product.
ReadingResultDate
Home page requestHTTP 200; H1 in the initial HTML: yes; 52 words; 0 JSON-LD blocks2026-11-05
Request with Accept: text/markdownHTTP 200, text/html, no Vary header2026-11-05
/llms.txt at the host rootHTTP 404, text/html, 36 KB2026-11-05
A made-up pathHTTP 302, redirect to https://zensical.org/agent-ready-check-je4acgr5/, then HTTP 4042026-11-05
Ora score, cached35, grade D2026-05-06
Cloudflare keyless scan7, L0 Not Ready2026-11-05

What it does not do

  • Zensical writes no llms.txt for a project that lacks the llmstxt plugin block and its sections list. source, read 5 November 2026.
  • Zensical's Markdown copies cover only the pages chosen for llms.txt, not every page of the site.

Related pages on this site

Sources

  1. Zensical (and Material for MkDocs): home page https://zensical.org/, read 5 November 2026
  2. Material for MkDocs blog https://squidfunk.github.io/mkdocs-material/blog/, read 5 November 2026
  3. Team - Zensical https://zensical.org/about/team/, read 5 November 2026
  4. Create your site - Zensical https://zensical.org/docs/create-your-site/, read 5 November 2026
  5. MkDocs - Zensical https://zensical.org/docs/compatibility/mkdocs/, read 5 November 2026
  6. MkDocs plugins - Zensical https://zensical.org/docs/compatibility/mkdocs/plugins/, read 5 November 2026
  7. Roadmap - Zensical https://zensical.org/roadmap/, read 5 November 2026
  8. Site search - Zensical https://zensical.org/docs/setup/search/, read 5 November 2026
  9. Basics - Zensical https://zensical.org/docs/setup/basics/, read 5 November 2026
  10. Release 0.0.74 · zensical/zensical · GitHub https://github.com/zensical/zensical/releases/tag/v0.0.74, read 5 November 2026
  11. Release mkdocs-material-9.8.0 · squidfunk/mkdocs-material · GitHub https://github.com/squidfunk/mkdocs-material/releases/tag/9.8.0, read 5 November 2026
  12. Zensical Studio pricing https://zensical.org/studio/pricing/, read 5 November 2026
  13. Zensical Spark pricing https://zensical.org/spark/pricing/, read 5 November 2026
  14. Publish your site - Zensical https://zensical.org/docs/publish-your-site/, read 5 November 2026
  15. License - Zensical https://zensical.org/license/, read 5 November 2026

Last reviewed 5 November 2026