test(middleware/node): derive mcp-protocol-version in the conformant-client header helper

Author: davidpavlovschi

packages/middleware/node/test/toNodeHandler.test.ts

@@ -40,10 +40,11 @@ function modernToolsCall(name: string, args: Record<string, unknown>): unknown {
 function bodyDerivedStandardHeaders(body: unknown): Record<string, string> {
     if (body === null || typeof body !== 'object' || Array.isArray(body)) return {};
     const b = body as { method?: unknown; params?: { name?: unknown; uri?: unknown; _meta?: Record<string, unknown> } };
-    if (typeof b.params?._meta?.[PROTOCOL_VERSION_META_KEY] !== 'string') return {};
-    const out: Record<string, string> = {};
+    const claimedVersion = b.params?._meta?.[PROTOCOL_VERSION_META_KEY];
+    if (typeof claimedVersion !== 'string') return {};
+    const out: Record<string, string> = { 'mcp-protocol-version': claimedVersion };
     if (typeof b.method === 'string') out['mcp-method'] = b.method;
-    const name = b.method === 'resources/read' ? b.params.uri : b.params.name;
+    const name = b.method === 'resources/read' ? b.params?.uri : b.params?.name;
     if (typeof name === 'string') out['mcp-name'] = name;
     return out;
 }