--- /dev/null
+<?php
+
+/**
+ * @file
+ * Dispatch events when patches are applied.
+ */
+
+namespace cweagans\Composer;
+
+class PatchEvents {
+
+ /**
+ * The PRE_PATCH_APPLY event occurs before a patch is applied.
+ *
+ * The event listener method receives a cweagans\Composer\PatchEvent instance.
+ *
+ * @var string
+ */
+ const PRE_PATCH_APPLY = 'pre-patch-apply';
+
+ /**
+ * The POST_PATCH_APPLY event occurs after a patch is applied.
+ *
+ * The event listener method receives a cweagans\Composer\PatchEvent instance.
+ *
+ * @var string
+ */
+ const POST_PATCH_APPLY = 'post-patch-apply';
+
+}