Please add better skill organization controls in the Codex app

<img width="1536" height="1024" alt="Image" src="https://github.com/user-attachments/assets/25654edb-5d43-4686-86bf-593c12c17a67" />

What variant of Codex are you using?

Codex Windows desktop app

What feature would you like to see?

Please add better skill organization controls in the Codex app.

Large plugins can install many individual skills, and Codex currently flattens those skills into one long global Skills list. This makes the Skills page harder to scan as more plugins are installed.

I would like the Skills page to support better organization, such as:

1. Group skills by source plugin.
2. Make plugin skill groups collapsible.
3. Add filters by plugin, category, source, enabled state, or hidden state.
4. Let plugin authors label skills as primary, secondary, internal, deprecated, or experimental.
5. Add bulk actions such as “show only primary skills,” “collapse plugin skills,” or “hide secondary skills from this plugin.”

The goal is to keep large plugins fully functional while making the Skills page easier to browse and manage.

Additional information

This came up after installing a large plugin in the Codex Windows desktop app. The plugin itself appears cleanly under Plugins, but all of its individual skills appear separately in the global Skills list.

The current layout makes larger plugins feel messy even when they are installed correctly. I do not want to remove or disable the plugin. I want a cleaner way to browse skills by source plugin, collapse large plugin groups, filter the list, or manage skill visibility in bulk.

A better structure would make larger skill-based plugins feel more native in Codex.