diff --git a/plugin.json b/plugin.json
new file mode 100644
index 0000000..0eddb63
--- /dev/null
+++ b/plugin.json
@@ -0,0 +1,12 @@
+{
+  "$schema": "https://agent-plugins.org/schemas/1.0.0/plugin.schema.json",
+  "name": "php-modernization",
+  "version": "1.21.1",
+  "description": "PHP 8.x modernization patterns with type safety and PHPStan",
+  "author": {
+    "name": "Netresearch DTT GmbH",
+    "url": "https://www.netresearch.de"
+  },
+  "repository": "https://github.com/netresearch/php-modernization-skill",
+  "license": "(MIT AND CC-BY-SA-4.0)"
+}