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WIP: Start work on integrating the new WordPress MCP Adapter #1010

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WIP: Start work on integrating the new WordPress MCP Adapter #1010

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5ee5146
Include the MCP Adapter via composer
dkotter Sep 15, 2025
ffaa6e1
Register the MCP server with access to our generate titles ability
dkotter Sep 15, 2025
7028dd9
Merge branch 'try/abilities-api' into try/wordpress-mcp
dkotter Sep 15, 2025
6cb1f8e
Remove unneeded variable
dkotter Sep 16, 2025
07382f4
Merge branch 'try/abilities-api' into try/wordpress-mcp
dkotter Sep 16, 2025
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9 changes: 8 additions & 1 deletion composer.json
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Original file line number Diff line number Diff line change
Expand Up @@ -9,12 +9,19 @@
],
"type": "wordpress-plugin",
"license": "GPLv2",
"repositories": [
{
"type": "vcs",
"url": "https://github.com/WordPress/mcp-adapter"
}
],
"require": {
"php": ">=7.4",
"yahnis-elsts/plugin-update-checker": "5.1",
"aws/aws-sdk-php": "^3.300",
"woocommerce/action-scheduler": "3.8.1",
"wordpress/abilities-api": "^0.1"
"wordpress/abilities-api": "^0.1",
"wordpress/mcp-adapter": "dev-trunk"
},
"autoload": {
"psr-4": {
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99 changes: 97 additions & 2 deletions composer.lock
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38 changes: 38 additions & 0 deletions includes/Classifai/Plugin.php
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Original file line number Diff line number Diff line change
@@ -1,6 +1,11 @@
<?php
namespace Classifai;

use WP\MCP\Core\McpAdapter;
use WP\MCP\Transport\Http\RestTransport;
use WP\MCP\Infrastructure\ErrorHandling\ErrorLogMcpErrorHandler;
use WP\MCP\Infrastructure\Observability\NullMcpObservabilityHandler;

class Plugin {

/**
Expand All @@ -18,6 +23,11 @@ class Plugin {
*/
public $admin_helpers = [];

/**
* @var McpAdapter $mcp_adapter The MCP adapter.
*/
public $mcp_adapter = null;

/**
* Lazy initialize the plugin
*/
Expand All @@ -42,6 +52,10 @@ public function enable() {
add_filter( 'plugin_action_links_' . CLASSIFAI_PLUGIN_BASENAME, [ $this, 'filter_plugin_action_links' ] );
add_filter( 'robots_txt', [ $this, 'maybe_block_ai_crawlers' ] );
add_action( 'after_classifai_init', [ $this, 'load_action_scheduler' ] );

// Initialize the MCP adapter so the hooks are loaded.
$this->mcp_adapter = McpAdapter::instance();
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In my testing, this was needed to ensure the MCP code was loaded. Not ideal but I'm assuming this will get better as this package matures

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So looked at this a bit closer and the issue here is when loading the plugin via composer, composer will add the autoloaded files from the plugin to our autoloader but that doesn't include the main plugin file (as WordPress takes care of loading that). In our case, we aren't loading this as a normal plugin and so that main file never loads, which is what initializes everything.

If you look at that file, it does this:

// Load the plugin.
if ( class_exists( WP\MCP\Plugin::class ) ) {
	WP\MCP\Plugin::instance();
}

That ends up calling McpAdapter::instance(); which is what we are doing here. So we can either leave this as-is or we can swap this out for the above

add_action( 'mcp_adapter_init', [ $this, 'mcp_adapter_init' ] );
}

/**
Expand Down Expand Up @@ -341,6 +355,30 @@ public function load_action_scheduler() {
}
}

/**
* Initialize the MCP adapter.
*
* @param McpAdapter $adapter The MCP adapter.
*/
public function mcp_adapter_init( McpAdapter $adapter ) {
$adapter->create_server(
'classifai',
'classifai',
'mcp',
'ClassifAI MCP Server',
'Custom MCP Server for ClassifAI Features',
'v1.0.0',
[
RestTransport::class,
],
ErrorLogMcpErrorHandler::class,
NullMcpObservabilityHandler::class,
[
'classifai/generate-title',
],
);
}

/**
* Migrate the existing settings to v3 if necessary.
*
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