Add agent skill and drush generator for Automator Type plugins
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Reported by: [marcus_johansson](https://www.drupal.org/user/385947)
Related to !1424
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<p>[Tracker]<br>
<strong>Update Summary: </strong>[One-line status update for stakeholders]<br>
<strong>Short Description: </strong>Add agent skill and drush generator for Automator Type plugins<br>
<strong>Check-in Date: </strong>MM/DD/YYYY<br>
[/Tracker]</p>
<h3 id="summary-problem-motivation">Problem/Motivation</h3>
<p>Automator Type plugins are the most commonly extended plugin type in the AI Automators submodule, with over 50 existing implementations covering different field types. Creating a new automator type requires understanding the <code>AiAutomatorTypeInterface</code>, the base class hierarchy (e.g. <code>RuleBase</code>), structured output schemas, value verification, and how the automator integrates with the field widget system.</p>
<p>An agent skill and Drush generator would significantly lower the barrier for developers creating automator types for custom field types.</p>
<h3 id="summary-proposed-resolution">Proposed resolution</h3>
<ul>
<li>Create <code>.agent/skills/create-automator-type/SKILL.md</code> describing how to create an Automator Type plugin, including the <code>@AiAutomatorType</code> attribute, the base class to extend, schema generation, value verification, and form configuration.</li>
<li>Include a complete working example of a simple automator type in the skill file.</li>
<li>Add a Drush generate command (<code>drush generate ai-automator-type</code>) that scaffolds the plugin class with the correct attribute, namespace, and stub methods.</li>
<li>Reference the existing automator type documentation and examples under <code>docs/modules/ai_automators/</code>.</li>
</ul>
<h3 id="summary-ai-usage">AI usage (if applicable)</h3>
<p>[x] AI Assisted Issue<br>
This issue was generated with AI assistance, but was reviewed and refined by the creator.</p>
<p>[ ] AI Assisted Code<br>
[ ] AI Generated Code<br>
[ ] Vibe Coded</p>
<p>- <strong>This issue was created with the help of AI</strong></p>
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