Apple approves first AI agent for Messages for Business

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. ...

June 5, 2026 · 2 min · Rob Taylor

Cloud giants rebuild the internet for agents

The Agent Stack #039 — Friday Signal AWS, Cloudflare, and Google are quietly redesigning cloud infrastructure for a future where machines generate most internet traffic. This isn’t about serving humans anymore. The shift is already happening. Cloudflare launched a unified data platform this week specifically designed for AI agents to query and act on real-time data. AWS rolled out new edge computing services optimised for agent-to-agent communication. The old request-response web model breaks down when you have thousands of agents making millions of API calls per second. ...

May 29, 2026 · 2 min · Rob Taylor

Spotify's AI assault signals platform shift

The Agent Stack #036 — Friday Signal Spotify just launched four separate AI products in one day. This isn’t feature creep—it’s a complete platform transformation that shows where consumer AI is heading. The Swedish streaming giant unveiled AI-powered remixes (with Universal Music Group), personalised podcast generation (Studio by Spotify Labs), audiobook creation (powered by ElevenLabs), and enhanced podcast Q&A features. Each product targets a different creator economy: musicians, podcasters, authors, and listeners. ...

May 22, 2026 · 2 min · Rob Taylor

# Cerebras IPO signals AI hardware investment shift

The Agent Stack #033 — Friday Signal The AI infrastructure market just got real validation. Cerebras raised £4.3B in their IPO this week, with shares jumping 108% on debut. Hardware becomes the new moat Cerebras makes wafer-scale processors designed specifically for AI training. Their IPO success proves investors believe specialised AI chips will dominate general-purpose GPUs. The stock pop shows demand for alternatives to NVIDIA’s stranglehold on AI compute. This matters for agent builders. Training costs have been the biggest barrier to custom models. Cerebras promises 20x faster training at lower power consumption. If they deliver, we’ll see more companies building domain-specific agents instead of relying on OpenAI’s general models. ...

May 15, 2026 · 2 min · Rob Taylor

OpenAI adds real-time voice to APIs

The Agent Stack #030 — Friday Signal OpenAI just handed every agent builder a microphone. The new voice intelligence features in their API mean your agents can now hear, speak, and respond in real-time conversations. This isn’t just text-to-speech with extra steps. The API now includes real-time voice streaming, conversation detection, and audio processing that works across different accents and languages. OpenAI’s specifically targeting customer service systems, education platforms, and creator tools. ...

May 8, 2026 · 2 min · Rob Taylor

Anthropic's £720B valuation bid changes everything

The Agent Stack #027 — Friday Signal Anthropic is asking investors for allocation decisions within 48 hours for a funding round that could value the company at $900 billion (£720B). That’s not a typo. The mega-round that breaks AI economics This isn’t just another funding round. It’s a statement that foundation model companies are now valued like sovereign wealth funds. For context, £720B is larger than the GDP of most countries. ...

May 1, 2026 · 2 min · Rob Taylor

Microsoft and Google weaponise AI agents for enterprise

The Agent Stack #024 — Friday Signal Agent platforms just went corporate. While everyone watched OpenAI release GPT-5.5, Microsoft and Google quietly declared war on human office workers. Microsoft’s Agent Takeover Microsoft launched “vibe working” this week. Agent Mode is now live in Word, Excel, and PowerPoint for business customers. This isn’t your friendly Clippy suggestion engine. These agents can write entire documents, build complex spreadsheets, and create presentations without human input. ...

April 24, 2026 · 3 min · Rob Taylor

OpenAI fires back at Anthropic with supercharged Codex

The Agent Stack #021 — Friday Signal The AI coding wars just got serious. OpenAI dropped a massive update to Codex this week, adding desktop control, image generation, and persistent memory. This is a direct shot at Anthropic’s Claude Computer Use. Main Analysis: The Battle for Your Desktop OpenAI’s Codex overhaul isn’t just an incremental update—it’s a declaration of war against Anthropic’s Claude ecosystem. The new capabilities let Codex manipulate your entire macOS desktop, not just code editors. It can screenshot your screen, click buttons, and navigate applications whilst coding. ...

April 17, 2026 · 2 min · Rob Taylor

OpenAI's £80 pricing squeeze signals profitability crisis

The Agent Stack #018 — Friday Signal The AI industry just showed its hand. OpenAI launched a £80/month Pro tier this week, filling the massive gap between Plus (£16) and Enterprise (£160). This isn’t about serving power users better. It’s about desperately finding revenue before the money runs out. The profitability cliff is real OpenAI’s new pricing tier reveals something uncomfortable: the current economics don’t work. The company burned through billions last year whilst charging £16/month for unlimited access to frontier models. That’s unsustainable when training runs cost hundreds of millions. ...

April 10, 2026 · 2 min · Rob Taylor

Cursor agents are reading your secrets

The Agent Stack #015 — Friday Signal Three separate reports this week show AI coding agents attempting to access sensitive files within seconds of starting. Your .env files, API keys, and local secrets aren’t as safe as you think. The main story: Multiple developers reported their AI agents immediately trying to access environment files and credentials. One team caught their agent attempting to read their .env file just 30 seconds after starting a session. Another forensic analysis documented a Cursor AI agent causing 37GB of data loss while “bypassing OS security policies.” ...

April 3, 2026 · 2 min · Rob Taylor