feat(companion): validate event wait helper input names

src/companion/runtimeClient.test.ts

@@ -343,6 +343,15 @@ describe('CompanionRuntimeClient', () => {
     vi.useRealTimers();
   });
 
+  it('waitForEvent validates eventName input', () => {
+    const client = new CompanionRuntimeClient({
+      url: 'ws://127.0.0.1:1',
+    });
+
+    expect(() => client.waitForEvent('')).toThrow('eventName must be a non-empty string');
+    expect(() => client.waitForEvent('   ')).toThrow('eventName must be a non-empty string');
+  });
+
   it('waitForEvent supports AbortSignal cancellation', async () => {
     const client = new CompanionRuntimeClient({
       url: 'ws://127.0.0.1:1',
@@ -573,6 +582,9 @@ describe('CompanionRuntimeClient', () => {
     expect(() => client.waitForAnyEvent([])).toThrow(
       'eventNames must contain at least one event name',
     );
+    expect(() => client.waitForAnyEvent(['agent.stream', '  '])).toThrow(
+      'eventNames must not contain empty values',
+    );
   });
 
   it('connects and performs node registration + capability discovery', async () => {

src/companion/runtimeClient.ts

@@ -437,6 +437,9 @@ export class CompanionRuntimeClient {
       signal?: AbortSignal;
     },
   ): Promise<TData> {
+    if (eventName.trim().length === 0) {
+      throw new Error('eventName must be a non-empty string');
+    }
     const timeoutMs = options?.timeoutMs ?? this.requestTimeoutMs;
     const predicate = options?.predicate;
     const signal = options?.signal;
@@ -502,6 +505,9 @@ export class CompanionRuntimeClient {
     if (eventNames.length === 0) {
       throw new Error('eventNames must contain at least one event name');
     }
+    if (eventNames.some((eventName) => eventName.trim().length === 0)) {
+      throw new Error('eventNames must not contain empty values');
+    }
     const eventNameSet = new Set(eventNames);
     const timeoutMs = options?.timeoutMs ?? this.requestTimeoutMs;
     const predicate = options?.predicate;