Port the Mistral open weights and the GLM family

app/MindWork AI Studio/Models/Mistral/MistralFamily.cs

@@ -0,0 +1,37 @@
+using static AIStudio.Provider.Capability;
+
+namespace AIStudio.Models.Mistral;
+
+/// <summary>
+/// The Mistral models which carry no further family name: Mistral 7B, Mistral 3, and their kin.
+/// </summary>
+/// <remarks>
+/// The open weights are where these live. Mistral's own API sells the named ranges -- Small,
+/// Medium, Large -- while the plain checkpoints are the ones people run themselves, which is why
+/// nothing here is dated: those names carry a size and a quantization instead of a release.
+///
+/// A substring, and it has to be one: this is the fallback of the whole range, and every family
+/// with a name of its own beats it by saying more. What it must not do is claim Ministral or
+/// Magistral, and it does not -- neither of those two names contains "mistral".
+/// </remarks>
+public sealed class MistralFamily : ModelFamily
+{
+    /// <inheritdoc />
+    public override ModelVendor Vendor => ModelVendor.MISTRAL_AI;
+
+    /// <inheritdoc />
+    public override ModelSource Source => new("https://docs.mistral.ai/getting-started/models/weights/", new DateOnly(2026, 9, 11), "Ported unchanged from the Mistral block of ProviderExtensions.OpenSource.cs: its default answer, and the rule for the 3 line.");
+
+    /// <inheritdoc />
+    protected override void Declare(ModelFamilyBuilder builder)
+    {
+        builder.Rule("mistral").AsSubstring()
+            .Capabilities(TEXT_INPUT | TEXT_OUTPUT | FUNCTION_CALLING)
+            .Apis(CHAT_COMPLETION_API);
+
+        // The 3 line reads images and thinks when it is asked to:
+        builder.Rule("mistral-3").AsSegment().Inherits()
+            .Capabilities(MULTIPLE_IMAGE_INPUT)
+            .Reasoning(ReasoningSupport.OPTIONAL);
+    }
+}