Adding .agent support in addition to .claude

.agents/skills/ash-framework/references/data_layers.md

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+# Data Layers
+
+Data layers determine how resources are stored and retrieved. Examples of data layers:
+
+- **Postgres**: For storing resources in PostgreSQL (via `AshPostgres`)
+- **ETS**: For in-memory storage (`Ash.DataLayer.Ets`)
+- **Mnesia**: For distributed storage (`Ash.DataLayer.Mnesia`)
+- **Embedded**: For resources embedded in other resources (`data_layer: :embedded`) (typically JSON under the hood)
+- **Ash.DataLayer.Simple**: For resources that aren't persisted at all. Leave off the data layer, as this is the default.
+
+Specify a data layer when defining a resource:
+
+```elixir
+defmodule MyApp.Post do
+  use Ash.Resource,
+    domain: MyApp.Blog,
+    data_layer: AshPostgres.DataLayer
+
+  postgres do
+    table "posts"
+    repo MyApp.Repo
+  end
+
+  # ... attributes, relationships, etc.
+end
+```
+
+For embedded resources:
+
+```elixir
+defmodule MyApp.Address do
+  use Ash.Resource,
+    data_layer: :embedded
+
+  attributes do
+    attribute :street, :string
+    attribute :city, :string
+    attribute :state, :string
+    attribute :zip, :string
+  end
+end
+```
+
+Each data layer has its own configuration options and capabilities. Refer to the rules & documentation of the specific data layer package for more details.