The Manage Plugins page (System → Updates → Manage Plugins) now includes two new utility buttons, available in both October CMS v3 and v4.
Clear Cache
A Clear Cache button is now available in the toolbar. This performs a full application cache clear, flushing the cache store along with all internal caches (combiner, twig, theme, blueprint, and meta). Previously this was only available via the command line.
Edit Composer
The Edit Composer button opens a popup with a full code editor for your project’s composer.json file. The editor uses JSON syntax highlighting and validates the JSON structure before saving, preventing malformed files from being written.
This makes it easier to manage plugin dependencies directly from the backend, adding repositories, adjusting version constraints, or modifying composer configuration without needing command line access.