Adding .agent support in addition to .claude

mix.exs

@@ -145,5 +145,22 @@ defmodule Mixer.MixProject do
         ]
       ]
     ]
+    [
+      file: "AGENTS.md",
+      usage_rules: ["usage_rules:all"],
+      skills: [
+        location: ".agents/skills",
+        build: [
+          "ash-framework": [
+            description: "Use this skill working with Ash Framework or any of its extensions. Always consult this when making any domain changes, features or fixes.",
+            usage_rules: [:ash, ~r/^ash_/]
+          ],
+          "phoenix-framework": [
+            description: "Use this skill working with Phoenix Framework. Consult this when working with the web layer, controllers, views, liveviews etc.",
+            usage_rules: [:phoenix, ~r/^phoenix_/]
+          ]
+        ]
+      ]
+    ]
   end
 end