Isamu Takeda

This block has the function of editing Markdown documents using SimpleMDE, and by parsing Markdown documents using marked, it can assign specific blocks to the converted HTML elements. 
This function allows users to customize Markdown documents using the styling functions of the corresponding blocks, allowing for a wide range of styling. 
The following are the blocks that are applied when Markdown documents are parsed into HTML elements.
<ol>
<li>H element: itmar/design-title</li>
<li>P element: core/paragraph</li>
<li>PRE element: itmar/code-highlight</li>
<li>IMG element: core/image</li>
<li>BLOCKQUOTE element: core/quote</li>
<li>LI element: core/list</li>
<li>TABLE element: core/table</li>
</ol>
The H element is also generated as a table of contents, and has the function of displaying nested items according to level. 
This plugin does not require any external resources (all scripts and styles are included locally)
<h3>Related Links</h3>
<ul>
<li><a href="https://github.com/itmaroon/markdown-block" rel="nofollow ugc">markdown-block:Github</a></li>
<li><a href="https://github.com/itmaroon/block-class-package" rel="nofollow ugc">block-class-package:GitHub</a> </li>
<li><a href="https://packagist.org/packages/itmar/block-class-package" rel="nofollow ugc">block-class-package:Packagist</a> </li>
<li><a href="https://www.npmjs.com/package/itmar-block-packages" rel="nofollow ugc">itmar-block-packages:npm</a> </li>
<li><a href="https://github.com/itmaroon/itmar-block-packages" rel="nofollow ugc">itmar-block-packages:GitHub</a></li>
</ul>
<h3>Arbitrary section</h3>
<ol>
<li>
PHP class management is now done using Composer. 
<a href="https://github.com/itmaroon/block-class-package" rel="nofollow ugc">GitHub</a> 
<a href="https://packagist.org/packages/itmar/block-class-package" rel="nofollow ugc">Packagist</a>
</li>
<li>
I decided to make functions and components common to other plugins into npm packages, and install and use them from npm. 
<a href="https://www.npmjs.com/package/itmar-block-packages" rel="nofollow ugc">npm</a> 
<a href="https://github.com/itmaroon/itmar-block-packages" rel="nofollow ugc">GitHub</a>
</li>
</ol>
<h3>External services</h3>
<ol>
<li>This plugin uses EasyMDE to implement the editing function of Markdown documents. This is an open source JavaScript library provided under the MIT license. 
<a href="https://github.com/Ionaru/easy-markdown-editor/blob/master/LICENSE" rel="nofollow ugc">EasyMDE LICENSE</a> 
EasyMDE comes with a spell check feature. 
When using this feature, it will try to load an external file (en_US.aff / en_US.dic) from a CDN. To avoid this, this plugin sets spellChecker: false, when instantiating EasyMDE, so that the external file will not be loaded.</li>
<li>This plugin uses marked to parse Markdown documents and convert them to HTML elements. This is an open source JavaScript library provided under the MIT license. 
<a href="https://github.com/markedjs/marked/blob/master/LICENSE.md" rel="nofollow ugc">marked LICENSE</a></li>
</ol>

MarkDown Block

This block converts Markdown documents into blocks for styling web pages.

Selvakumar Duraipandian

Markdown for AI Agents is a lightweight WordPress plugin that enables HTTP content negotiation for your site’s content. When a client (like an AI agent or a custom script) requests a page with the <code>Accept: text/markdown</code> header, the plugin intercepts the request and returns a clean, structured Markdown representation of the post or page content.
This is ideal for AI crawlers, RAG (Retrieval-Augmented Generation) systems, and non-browser clients that prefer machine-friendly text over complex HTML.
Important note: This plugin is primarily a developer/integration tool. Human visitors browsing your site will never see any difference — the Markdown output is only served when explicitly requested via the <code>Accept: text/markdown</code> HTTP header. Normal browser requests always receive the standard HTML page.
Key Features:
<ul>
<li>Automatically detects <code>Accept: text/markdown</code> headers.</li>
<li>Converts HTML content to clean Markdown using the League HTMLToMarkdown library.</li>
<li>Strips away theme layout, navigation, headers, footers, and sidebars — serving only the main content.</li>
<li>Adds useful HTTP response headers: <code>Content-Type: text/markdown</code>, <code>Vary: Accept</code>, and <code>X-Markdown-Word-Count</code>.</li>
<li>Respects WordPress visibility rules and filters.</li>
<li>No configuration required — works out of the box for posts, pages, and custom post types.</li>
</ul>
<h3>How It Works</h3>
This plugin uses a standard web technique called HTTP content negotiation. The same URL on your site can serve different representations of the same content depending on what the client asks for:
<ul>
<li>A regular browser sends <code>Accept: text/html</code> → receives your normal HTML page.</li>
<li>An AI agent sends <code>Accept: text/markdown</code> → receives a clean Markdown version of the same page.</li>
</ul>
No extra URLs, no duplicate content, no configuration needed. The plugin hooks into WordPress’s <code>template_redirect</code> action, detects the <code>Accept</code> header, captures the rendered HTML, converts it to Markdown, and returns it with appropriate headers.
<h3>Why Markdown for AI Agents?</h3>
When building RAG (Retrieval-Augmented Generation) applications or AI pipelines that ingest web content, HTML is extremely noisy. A typical WordPress page contains thousands of tokens worth of HTML tags, inline styles, navigation menus, scripts, and layout markup — none of which carries meaning for an AI model.
Serving clean Markdown instead can reduce token consumption by up to 60%, which means:
<ul>
<li>Lower API costs — fewer tokens ingested when loading pages into vector stores or LLM pipelines.</li>
<li>Faster processing — less text for the model to parse, filter, and discard.</li>
<li>Better retrieval accuracy — higher signal-to-noise ratio improves the quality of RAG results.</li>
<li>Simpler pipelines — no need for custom HTML stripping logic on the client side; the plugin handles it server-side.</li>
</ul>
Any AI agent, crawler, or ingestion script that sends <code>Accept: text/markdown</code> in its request header will automatically receive the clean Markdown version — no extra URLs, no separate endpoints, no changes to your content workflow.

Markdown for AI Agents

Serve clean Markdown versions of WordPress content to AI agents using HTTP content negotiation.

MarkDown Block vs Markdown for AI Agents