refactor(agent): align delivery method names

packages/examples/cli-demo/src/cli.ts

@@ -290,7 +290,7 @@ export async function runOneShot(ctx: Context, options: OneShotOptions): Promise
   try {
     /* v8 ignore next -- skips send only when cancellation wins the listener-registration race above */
     if (!settled) { // eslint-disable-line @typescript-eslint/no-unnecessary-condition
-      agent.send([{ type: 'text', text: options.task }])
+      agent.followup([{ type: 'text', text: options.task }])
     }
     await turnEnded
   } finally {

packages/examples/cli-demo/tests/cli.spec.ts

@@ -471,7 +471,7 @@ describe('runOneShot and executeCli', () => {
     startup.ctx.on('session/event', (session, event) => {
       if (session === startup.agent.session && event.type === 'assistant/chunk') started()
     })
-    startup.agent.send([{ type: 'text', text: 'first' }])
+    startup.agent.followup([{ type: 'text', text: 'first' }])
     await running
     const startupAbort = new AbortController()
     const waiting = runOneShot(startup.ctx, { task: 'second', signal: startupAbort.signal })