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

app/MindWork AI Studio/Models/Baidu/ErnieFamily.cs

@@ -0,0 +1,41 @@
+using static AIStudio.Provider.Capability;
+
+namespace AIStudio.Models.Baidu;
+
+/// <summary>
+/// ERNIE, from Baidu.
+/// </summary>
+/// <remarks>
+/// The line calls functions and the thinking checkpoints keep the channel open whatever the request
+/// says. The vision checkpoints are the exception, and the reason this family is written down at
+/// all: they run in a thinking and a non-thinking mode, and tool calling is not documented for them.
+/// Left to the assumption they would be offered tools nobody has said they can use.
+///
+/// The vision rule wins over the thinking rule by the latter stepping aside rather than by being
+/// less specific: ERNIE ships a checkpoint which is both, and two rules claiming it with the same
+/// right would be a coin toss.
+/// </remarks>
+public sealed class ErnieFamily : ModelFamily
+{
+    /// <inheritdoc />
+    public override ModelVendor Vendor => ModelVendor.BAIDU;
+
+    /// <inheritdoc />
+    public override ModelSource Source => new("https://ernie.baidu.com/blog/", new DateOnly(2026, 9, 12), "Ported unchanged from the ERNIE block of ProviderExtensions.OpenSource.cs.");
+
+    /// <inheritdoc />
+    protected override void Declare(ModelFamilyBuilder builder)
+    {
+        builder.Rule("ernie").AsSubstring()
+            .Capabilities(TEXT_INPUT | TEXT_OUTPUT | FUNCTION_CALLING)
+            .Apis(CHAT_COMPLETION_API);
+
+        builder.Rule("ernie").AsSubstring().AlsoContains("thinking").NotContains("vl").Inherits()
+            .Reasoning(ReasoningSupport.ALWAYS);
+
+        builder.Rule("ernie").AsSubstring().AlsoContains("vl")
+            .Capabilities(TEXT_INPUT | MULTIPLE_IMAGE_INPUT | TEXT_OUTPUT)
+            .Apis(CHAT_COMPLETION_API)
+            .Reasoning(ReasoningSupport.OPTIONAL);
+    }
+}