Psalm can be extended through plugins to find and fix domain-specific issues.
Using Composer-based plugins
Psalm plugins are distributed as composer packages.
Plugins can be found on Packagist website: https://packagist.org/?type=psalm-plugin or from CLI using
composer search -t psalm-plugin '.'
composer require --dev <plugin-vendor/plugin-package>
Managing known plugins
Once installed, use
psalm-plugin tool to enable, disable and show available and enabled plugins.
To enable the plugin, run
psalm-plugin enable plugin-vendor/plugin-package. To disable it, run
psalm-plugin disable plugin-vendor/plugin-package.
psalm-plugin show (as well as bare
psalm-plugin) will show you the list of enabled plugins, and the list of plugins known to
psalm-plugin (installed into your
Using your own plugins
Is there no plugin for your favourite framework / library yet? Create it! It's as easy as forking a repository, tweaking some docblocks and publishing the package to Packagist.
Consult Authoring Plugins chapter to get started.