The Agent Stack #042 — Friday Signal

Apple just cracked open its walled garden for AI agents. For the first time ever.

The Big Move

Apple approved Poke as the first AI agent on its Messages for Business platform. This matters because Apple has been notoriously restrictive about AI integration across its ecosystem.

Poke lets users interact with AI agents through simple text messages. Think of it as ChatGPT, but instead of opening an app, you just text a business number. The AI handles customer service, bookings, orders - whatever that business needs.

Here’s why this changes everything for agent builders: Apple’s Messages for Business reaches 1.4 billion iOS users. That’s massive distribution without requiring app downloads or new interfaces. Users already know how to text.

The approval suggests Apple is quietly positioning itself for an agent-first future. At WWDC next week, expect major Siri improvements and broader Apple Intelligence updates. But this Poke approval is the real signal - Apple is ready to let AI agents into its core messaging infrastructure.

For practitioners, this opens a new deployment channel. Instead of building web interfaces or Slack bots, you can now build agents that work through iMessage. The user experience is frictionless - just save a business contact and start texting your AI assistant.

Takeaway: Start testing agent workflows through SMS interfaces. Apple’s approval of Poke means text-based agents are about to become mainstream.

Quick Hits

• Anthropic’s IPO momentum builds - Annual revenue hit £37B ($47B) in May, up from £7B ($9B) at end of 2025. That’s 5x growth in five months. Public markets are paying attention.

• Amazon deploys voice-controlled warehouse robots - New Proteus version uses natural language instead of code. Workers can literally talk to robots. This is agent-human collaboration in production.

• UK forces Google to offer AI search opt-out - Publishers can now exclude their content from AI search features. Global rollout planned. Content licensing negotiations just got more complex.

One Thing to Try

Build a simple SMS agent using Twilio and your preferred LLM. Create a basic customer service bot that handles common queries. Test how natural the text conversation feels compared to web chat interfaces. Apple’s move means SMS agents are about to explode - get ahead of it.

The agent revolution isn’t coming through apps. It’s coming through text messages.