Limit closed union codegen scope

Author: gokhanarkan

dotnet/src/Generated/Rpc.cs

@@ -11,7 +11,10 @@ import fs from "fs/promises";
 import type { JSONSchema7 } from "json-schema";
 import path from "path";
 import { fileURLToPath } from "url";
-import { analyseDiscriminatedUnionVariants } from "../../../scripts/codegen/schema-unions.js";
+import {
+    analyseDiscriminatedUnionVariants,
+    analyseNestedClosedUnionResult,
+} from "../../../scripts/codegen/schema-unions.js";
 
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = path.dirname(__filename);
@@ -1465,13 +1468,7 @@ async function generateRpcTypes(schemaPath: string): Promise<void> {
     for (const section of [schema.server, schema.session, schema.clientSession, schema.clientGlobal]) {
         if (!section) continue;
         for (const [, method] of collectRpcMethods(section)) {
-            const result = resolveRef(method.result ?? undefined);
-            const union = result?.anyOf ?? result?.oneOf;
-            if (
-                union
-                && Array.isArray(union)
-                && findDiscriminator(resolveUnionVariants(union as JSONSchema7[]))
-            ) {
+            if (analyseNestedClosedUnionResult(method.result, currentDefinitions)) {
                 collectPromotedNestedUnionTypes(method.result);
             }
         }

go/rpc/zrpc_encoding.go

@@ -31,7 +31,7 @@ public record McpInstallPlan(
     /** Origin and semantic digest of the exact validated JSON MCP card content bound to this plan. */
     @JsonProperty("provenance") McpPlanProvenance provenance,
     /** Every eligible transport, so a host can present an explicit choice. A completed plan always has at least one; when none is eligible, planning returns `CatalogUnavailableTransportError` instead. */
-    @JsonProperty("transportChoices") List<McpPlanTransportChoice> transportChoices,
+    @JsonProperty("transportChoices") List<Object> transportChoices,
     /** Identifier of the choice the runtime would pick by default. Omitted when there is no eligible transport, or when the runtime expresses no preference. */
     @JsonProperty("recommendedTransportChoiceId") String recommendedTransportChoiceId,
     /** Configuration scope and key the plan would write to. */