Better type info for result

Co-Authored-By: Copilot <223556219+Copilot@users.noreply.github.com>

Author: SteveSandersonMS

dotnet/src/Generated/Rpc.cs

@@ -374,11 +374,26 @@ internal class SessionAgentListRequest
     public string SessionId { get; set; } = string.Empty;
 }
 
+public class SessionAgentGetCurrentResultAgent
+{
+    /// <summary>Unique identifier of the custom agent</summary>
+    [JsonPropertyName("name")]
+    public string Name { get; set; } = string.Empty;
+
+    /// <summary>Human-readable display name</summary>
+    [JsonPropertyName("displayName")]
+    public string DisplayName { get; set; } = string.Empty;
+
+    /// <summary>Description of the agent's purpose</summary>
+    [JsonPropertyName("description")]
+    public string Description { get; set; } = string.Empty;
+}
+
 public class SessionAgentGetCurrentResult
 {
     /// <summary>Currently selected custom agent, or null if using the default agent</summary>
     [JsonPropertyName("agent")]
-    public object? Agent { get; set; }
+    public SessionAgentGetCurrentResultAgent? Agent { get; set; }
 }
 
 internal class SessionAgentGetCurrentRequest
@@ -794,6 +809,7 @@ public async Task<SessionCompactionCompactResult> CompactAsync(CancellationToken
 [JsonSerializable(typeof(SessionAgentDeselectResult))]
 [JsonSerializable(typeof(SessionAgentGetCurrentRequest))]
 [JsonSerializable(typeof(SessionAgentGetCurrentResult))]
+[JsonSerializable(typeof(SessionAgentGetCurrentResultAgent))]
 [JsonSerializable(typeof(SessionAgentListRequest))]
 [JsonSerializable(typeof(SessionAgentListResult))]
 [JsonSerializable(typeof(SessionAgentSelectRequest))]

dotnet/test/AgentAndCompactRpcTests.cs

@@ -89,6 +89,7 @@ public async Task Should_Select_And_Get_Current_Agent()
         // Verify getCurrent returns the selected agent
         var currentResult = await session.Rpc.Agent.GetCurrentAsync();
         Assert.NotNull(currentResult.Agent);
+        Assert.Equal("test-agent", currentResult.Agent.Name);
     }
 
     [Fact]

scripts/codegen/csharp.ts

@@ -467,6 +467,14 @@ function singularPascal(s: string): string {
 }
 
 function resolveRpcType(schema: JSONSchema7, isRequired: boolean, parentClassName: string, propName: string, classes: string[]): string {
+    // Handle anyOf: [T, null] → T? (nullable typed property)
+    if (schema.anyOf) {
+        const hasNull = schema.anyOf.some((s) => typeof s === "object" && (s as JSONSchema7).type === "null");
+        const nonNull = schema.anyOf.filter((s) => typeof s === "object" && (s as JSONSchema7).type !== "null");
+        if (nonNull.length === 1) {
+            return resolveRpcType(nonNull[0] as JSONSchema7, isRequired && !hasNull, parentClassName, propName, classes);
+        }
+    }
     // Handle enums (string unions like "interactive" | "plan" | "autopilot")
     if (schema.enum && Array.isArray(schema.enum)) {
         const enumName = getOrCreateEnum(parentClassName, propName, schema.enum as string[], rpcEnumOutput);