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

app/MindWork AI Studio/Models/OpenWeights/BaseCheckpointFamily.cs

@@ -0,0 +1,42 @@
+using AIStudio.Provider;
+
+using static AIStudio.Provider.Capability;
+
+namespace AIStudio.Models.OpenWeights;
+
+/// <summary>
+/// Base checkpoints, whatever family they come from.
+/// </summary>
+/// <remarks>
+/// A base checkpoint is the model before anybody taught it to answer: it continues a text, it knows
+/// no chat template, and there is nothing in it that a tool definition could reach. Which family it
+/// belongs to changes none of that, which is why this states a modifier rather than a rule of its
+/// own -- the family says what the model is, and this takes away what the instruction tuning would
+/// have added.
+///
+/// Reading pictures goes with it. The vision tower may well be there, but without a template there
+/// is no way to hand an image to it, so promising the chat that it can send one would be a promise
+/// nobody can keep.
+///
+/// The name part has to be exactly "base", so that a model whose name merely carries the word, as
+/// in "based", is left alone.
+/// </remarks>
+public sealed class BaseCheckpointFamily : ModelFamily
+{
+    private const Capability WHAT_THE_INSTRUCTION_TUNING_WOULD_HAVE_ADDED =
+        SINGLE_IMAGE_INPUT | MULTIPLE_IMAGE_INPUT | AUDIO_INPUT | SPEECH_INPUT | VIDEO_INPUT |
+        AUDIO_OUTPUT | IMAGE_OUTPUT | SPEECH_OUTPUT | VIDEO_OUTPUT |
+        FUNCTION_CALLING | WEB_SEARCH;
+
+    /// <inheritdoc />
+    public override ModelVendor Vendor => ModelVendor.UNKNOWN;
+
+    /// <inheritdoc />
+    public override ModelSource Source => new("https://huggingface.co/docs/transformers/en/chat_templating", new DateOnly(2026, 9, 11), "Ported unchanged from the base checkpoint check of ProviderExtensions.OpenSource.cs, which answers before any family is asked.");
+
+    /// <inheritdoc />
+    protected override void Declare(ModelFamilyBuilder builder) =>
+        builder.Modifier("base").AsSegment()
+            .Removes(WHAT_THE_INSTRUCTION_TUNING_WOULD_HAVE_ADDED)
+            .Reasoning(ReasoningSupport.NONE);
+}