Say what Google's music, research and answering models are made for

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

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+using AIStudio.Provider;
+
+using static AIStudio.Provider.Capability;
+
+namespace AIStudio.Models.Google;
+
+/// <summary>
+/// The Google models which are handed a job rather than a message.
+/// </summary>
+/// <remarks>
+/// Both of these answer on the Interactions API alone, never on generateContent: one request starts
+/// an autonomous loop which plans, runs code, manages files and searches the web, and a research
+/// run takes minutes rather than seconds. A chat request does not time out against them -- it never
+/// arrives.
+///
+/// Deep Research is the reason these rules are bound to Google instead of standing among the kinds.
+/// Perplexity sells something under that name too, and sonar-deep-research is an ordinary chat
+/// model with web search bolted on, stated in its own family. The same two words, two different
+/// things, and only the provider tells them apart. Antigravity needs no such guard -- nobody else
+/// names a model that -- but it is a statement about Google's catalog all the same, so it stands
+/// where the other one stands.
+/// </remarks>
+public sealed class GoogleAgentFamily : ModelFamily
+{
+    /// <inheritdoc />
+    public override ModelVendor Vendor => ModelVendor.GOOGLE;
+
+    /// <inheritdoc />
+    public override ModelSource Source => new("https://ai.google.dev/gemini-api/docs/deep-research", new DateOnly(2026, 9, 19), "Deep Research runs only through the Interactions API and only in the background, because a single run takes five to twenty minutes. The Antigravity agent is documented at https://ai.google.dev/gemini-api/docs/antigravity-agent and works the same way, on a sandbox Google hosts.");
+
+    /// <inheritdoc />
+    protected override void Declare(ModelFamilyBuilder builder)
+    {
+        builder.Rule("deep-research").AsPrefix().OnlyOn(LLMProviders.GOOGLE)
+            .Capabilities(TEXT_INPUT)
+            .Kind(ModelKind.AGENT);
+
+        builder.Rule("antigravity").AsSegment().OnlyOn(LLMProviders.GOOGLE)
+            .Capabilities(TEXT_INPUT)
+            .Kind(ModelKind.AGENT);
+    }
+}