Rebuilt how AI Studio knows what a model can do (#960)

app/MindWork AI Studio/Models/Google/ImagenFamily.cs

@@ -0,0 +1,32 @@
+using AIStudio.Provider;
+
+using static AIStudio.Provider.Capability;
+
+namespace AIStudio.Models.Google;
+
+/// <summary>
+/// Imagen, which draws a picture from a description and does nothing else.
+/// </summary>
+/// <remarks>
+/// The previous rules had no branch for it. Its name does not contain "gemini", so it fell to the
+/// last line of the Google function and was answered as a chat model: reads images, writes text,
+/// calls functions. Not one of the three is true, and the one thing it does -- writing an image --
+/// was not said at all.
+///
+/// Whole name parts, not a substring: "imagen" also sits inside "imagenet" and "reimagined", and a
+/// chat model carrying such a word would be turned into an image generator by a careless match.
+/// </remarks>
+public sealed class ImagenFamily : ModelFamily
+{
+    /// <inheritdoc />
+    public override ModelVendor Vendor => ModelVendor.GOOGLE;
+
+    /// <inheritdoc />
+    public override ModelSource Source => new("https://ai.google.dev/gemini-api/docs/imagen", new DateOnly(2026, 9, 11), "A description goes in and an image comes out; there is no conversation and no tool calling.");
+
+    /// <inheritdoc />
+    protected override void Declare(ModelFamilyBuilder builder) =>
+        builder.Rule("imagen").AsSegment()
+            .Capabilities(TEXT_INPUT | IMAGE_OUTPUT)
+            .Kind(ModelKind.IMAGE_GENERATION);
+}