Stop guessing a model's kind from its name at Google, Mistral, and xAI

app/MindWork AI Studio/Provider/Google/ProviderGoogle.cs

@@ -172,11 +172,15 @@ public class ProviderGoogle() : BaseProvider(LLMProviders.GOOGLE, new Uri("https
                 // Asking what a model is made for, rather than only ruling out the embedding ones.
                 // Google names everything after the chat model it grew out of, so the catalog is
                 // full of names which look like something to talk to and are not: the image models,
-                // and the computer use model whose API refuses a request without its tool.
+                // the computer use model whose API refuses a request without its tool, and the live
+                // line which wants a connection held open in both directions.
                 //
-                ..result.Models.Where(model =>
-                        model.Id.StartsWith("gemini-", StringComparison.OrdinalIgnoreCase) &&
-                        model.IsChatModel(this.Provider))
+                // The question used to be asked of names beginning with "gemini" alone, and that
+                // cost the two Gemma models Google serves on this very route. What the prefix kept
+                // out besides them -- Lyria, Imagen, Veo, the research and coding agents, AQA --
+                // is kept out by a rule now, where the reason is written down.
+                //
+                ..result.Models.Where(model => model.IsChatModel(this.Provider))
                     .Select(this.WithDisplayNameFallback)
             ]
         };

app/MindWork AI Studio/Provider/Mistral/ProviderMistral.cs

@@ -93,12 +93,13 @@ public sealed class ProviderMistral() : BaseProvider(LLMProviders.MISTRAL, new U
         {
             Models =
             [
-                // Codestral is a fill-in-the-middle model, which we cannot use for chats. That is
-                // specific to Mistral's catalog, which is why it is not part of the shared model
-                // kind detection:
-                ..modelResponse.Models.Where(n =>
-                    !n.Id.StartsWith("code", StringComparison.OrdinalIgnoreCase) &&
-                    n.IsChatModel(this.Provider))
+                //
+                // Codestral is a fill-in-the-middle model, which we cannot use for chats. Its own
+                // family says so now, bound to this provider, so the word "code" no longer has to
+                // be tested for here -- and testing for it never reached mistral-code-fim-latest,
+                // which does the same job under a name that begins differently.
+                //
+                ..modelResponse.Models.Where(n => n.IsChatModel(this.Provider))
             ]
         };
     }

app/MindWork AI Studio/Provider/X/ProviderX.cs

@@ -76,7 +76,7 @@ public sealed class ProviderX() : BaseProvider(LLMProviders.X, new Uri("https://
     /// <inheritdoc />
     public override async Task<ModelLoadResult> GetTextModels(string? apiKeyProvisional = null, CancellationToken token = default)
     {
-        var result = await this.LoadModels(SecretStoreType.LLM_PROVIDER, ["grok-"], apiKeyProvisional, token);
+        var result = await this.LoadModels(SecretStoreType.LLM_PROVIDER, apiKeyProvisional, token);
         return result with
         {
             //
@@ -108,19 +108,24 @@ public sealed class ProviderX() : BaseProvider(LLMProviders.X, new Uri("https://
     
     #endregion
     
-    private Task<ModelLoadResult> LoadModels(SecretStoreType storeType, string[] prefixes, string? apiKeyProvisional, CancellationToken token)
+    /// <summary>
+    /// Reads the xAI catalog, whole.
+    /// </summary>
+    /// <remarks>
+    /// Every name in it begins with "grok", which is why the prefix this used to filter by never
+    /// took anything away -- and why it said nothing either. What it did carry was Grok 2, appended
+    /// to every answer whether xAI still served it or not. It does not: the catalog has moved on to
+    /// Grok 4, and an entry nobody can talk to is worse than one missing from the list.
+    ///
+    /// What the catalog does hold besides the chat models is five names which draw or film. The
+    /// caller asks the registry about those.
+    /// </remarks>
+    private Task<ModelLoadResult> LoadModels(SecretStoreType storeType, string? apiKeyProvisional, CancellationToken token)
     {
         return this.LoadModelsResponse<ModelsResponse>(
             storeType,
             "models",
-            modelResponse => modelResponse.Data.Where(model => prefixes.Any(prefix => model.Id.StartsWith(prefix, StringComparison.InvariantCulture)))
-                .Concat([
-                    new Model
-                    {
-                        Id = "grok-2-latest",
-                        DisplayName = "Grok 2.0 (latest)",
-                    }
-                ]),
+            modelResponse => modelResponse.Data,
             apiKeyProvisional, token: token);
     }
 }