Add wp theme cache command

[Copilot]

• Create Theme_Cache_Command.php class with clear and flush methods
• Register 'theme cache' command in extension-command.php
• Add Behat tests for theme cache commands
• Update phpcs.xml.dist to exclude Theme_Cache_Command from prefix rule
• Update composer.json with new commands
• Verify code passes linting, code style, and static analysis checks
• Run code review and security checks
• Use WP_Theme::cache_delete() method instead of manual cache key construction
• Implementation complete and ready for review

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Add wp theme cache command</issue_title>
<issue_description>## Feature Request

• Yes, I reviewed the contribution guidelines.

Describe your use case and the problem you are facing

Add the following commands

wp theme cache <theme> get <key> 
wp theme cache <theme> add <key> <data>
wp theme cache <theme> delete

Describe the solution you'd like

Add command would map to the method cache_add on WP_Theme class.
Get command would map to the method cache_get on WP_Theme class.
Delete command would map to the method cache_delete on WP_Theme class.

This would help manage and clear theme related caches.

</issue_description>

Comments on the Issue (you are @copilot in this section)

@danielbachhuber I amenable to this. Feel free to submit a pull request, if you'd like. Here is some [guidance on our pull request best practices](https://make.wordpress.org/cli/handbook/contributions/pull-requests/). @swissspidy `WP_Theme::cache_add()` and `WP_Theme::cache_get()` are private, so we can't really use these.

The delete method is public, but maybe this could be used via wp cache delete and wp cache flush-group? The cache key property itself is also private though, so we can't really access it.</comment_new>

• Fixes Add wp theme cache command #392

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[Copilot]

Just as a heads up, I was blocked by some firewall rules while working on your feedback. Expand below for details.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• developer.wordpress.org
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node /home/REDACTED/work/_temp/ghcca-node/node/bin/node --enable-source-maps /home/REDACTED/work/_temp/copilot-developer-action-main/dist/index.js (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)