Agent Ready HTML

Writerside: vendor profile

In short

Writerside is free but closed source, and now exists only as a plugin for JetBrains IDEs. Sitemap and llms.txt output wait for tags in buildprofiles.xml, and indexing stays off until allowed. The help site redirected /llms.txt with a 302 on 2026-11-05, and getting-started.html.md was served with the content type */*.

At a glance

standards.txt writerside

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

0 supports, 2 partial or announced, 4 no statement.

Writerside Framework

JetBrains documentation authoring tool, now a free IDE plugin, whose builder publishes help websites; buildprofiles.xml switches on llms.txt with .html.md Markdown copies and a sitemap, and instances stay out of search indexes unless allowed.

Type
Framework
Operator, as the facts below state it
JetBrains
Home page
www.jetbrains.com/writerside, answered HTTP 200 on 2026-11-05
Last read
5 November 2026

What it does for this layer

  • JetBrains retired the standalone Writerside IDE on 2025-03-20; Writerside lives on as a free plugin for JetBrains IDEs. [primary source, 2025-03-20] source, read 5 November 2026.
  • JetBrains launched the Writerside Early Access Program in October 2023, built on the IntelliJ Platform. [primary source] source, read 5 November 2026.
  • JetBrains says it has no plans to open-source the Writerside IDE, so unlike most tools in this group Writerside is free but closed source. [vendor claim] source, read 5 November 2026.
  • Writerside can generate an llms.txt listing every topic in a help instance, each linked to a .html.md Markdown version of the topic. [primary source] source, read 5 November 2026.
  • With llms.txt switched on through <llms-txt>true</llms-txt> in buildprofiles.xml, Writerside adds references to llms.txt and the page's Markdown version to every HTML head. [primary source] source, read 5 November 2026.
  • Writerside also lists /llms.txt as a <url> entry in sitemap.xml once the feature is enabled. [primary source] source, read 5 November 2026.
  • Writerside writes no sitemap by default; a <sitemap> tag in buildprofiles.xml, with optional priority and change-frequency, turns it on. [primary source] source, read 5 November 2026.
  • Writerside keeps published content out of search engines unless the noindex-content variable is set to false or Allow search engine indexing is ticked for the instance. [primary source] source, read 5 November 2026.
  • Writerside builds help websites with its bundled builder locally or with a Docker image of the builder in CI. [primary source] source, read 5 November 2026.
  • The Writerside help site on jetbrains.com redirected /llms.txt with a 302 to /llms.txt/ on 2026-11-05, where a 9,328-byte text/plain index answered. [observed] source, read 5 November 2026.
  • After the same trailing-slash redirect, the Writerside help page getting-started.html.md/ was served on 2026-11-05 with the content type */* rather than text/markdown. [observed] source, read 5 November 2026.
  • Asked for getting-started.html with Accept: text/markdown on 2026-11-05, the Writerside help site sent 24,116 bytes of HTML whose H1 Getting started was already in the markup. [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
Writerside pluginJetBrains IDE plugin for writing, testing and building documentation websites.Free
free plugin on JetBrains Marketplace; standalone IDE retired 2025-03-20; not open source		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-txtpartialWriterside generates llms.txt once <llms-txt>true</llms-txt> is set in buildprofiles.xml.source
markdown-negotiationno statementNo statement found in the Generate llms.txt, sitemap, indexing or build topics; the help site answered Accept: text/markdown with HTML.none
markdown-twinpartialWith llms.txt enabled each topic gets a .html.md Markdown version linked from llms.txt and the page head.source
initial-htmlno statementNo statement found on output rendering in the build and publish topic; the jetbrains.com help page carried its H1 in the served HTML.none
real-404no statementNo statement found in the Writerside topics read; jetbrains.com/help/writerside returned 404 for a made-up topic on 2026-11-05.none
vary-acceptno statementNo statement found in the Writerside topics read; Writerside output does not negotiate on Accept.none

Checks on its own site

Plain-fetch checks ran on https://www.jetbrains.com/writerside/; the Ora and Cloudflare scores cover the whole host jetbrains.com.

Readings of jetbrains.com, the vendor's own website, which describe that site and not the product.
ReadingResultDate
Home page requestHTTP 200; H1 in the initial HTML: no; 10 words; 1 JSON-LD block2026-11-05
Request with Accept: text/markdownHTTP 200, text/html, no Vary header2026-11-05
/llms.txt at the host rootHTTP 404, text/html, 42 KB2026-11-05
A made-up pathHTTP 301, redirect to /agent-ready-check-yk8b93em/, then HTTP 4042026-11-05
Ora score, cached62, grade C2026-10-29
Cloudflare keyless scan20, L1 Basic Web Presence2026-11-05
Shared crawl rowTranco rank 958; home page HTTP 200; H1 in the HTML: yes; 1,329 words; JSON-LD types: WebPage; answers markdown: no; made-up path HTTP 404; llms.txt valid: no2026-11-04

What it does not do

  • Writerside is not open source and is no longer sold as a standalone IDE.

Related pages on this site

Sources

  1. Writerside (JetBrains product page) https://www.jetbrains.com/writerside/, read 5 November 2026
  2. Sunsetting Writerside IDE (The JetBrains Blog) https://blog.jetbrains.com/writerside/2025/03/sunsetting-writerside-ide/, read 5 November 2026
  3. Generate llms.txt | Writerside Documentation https://www.jetbrains.com/help/writerside/generate-llms-txt.html, read 5 November 2026
  4. Generate sitemap | Writerside Documentation https://www.jetbrains.com/help/writerside/generate-sitemap.html, read 5 November 2026
  5. Allow search engine indexing | Writerside Documentation https://www.jetbrains.com/help/writerside/allow-search-engine-indexing.html, read 5 November 2026
  6. Build and publish | Writerside Documentation https://www.jetbrains.com/help/writerside/build-and-publish.html, read 5 November 2026

Last reviewed 5 November 2026