April 2026
11 posts: 11 entries
April 4, 2026
AG-UI Protocol: The Missing Standard for AI Agent Interfaces
If you built applications with AI agents, you hit this wall: every framework has its own way of streaming responses to the UI. LangChain uses callbacks and streaming iterators. CrewAI returns completed results. AutoGen has its own message protocol. Amazon Bedrock Agents uses a proprietary streaming format. OpenAI Assistants has yet another event structure.
[... 1,995 words]AG-UI Protocol: A Layer-by-Layer Deep Dive with Real Network Captures
There’s a common misconception about AG-UI: people treat it as a transport protocol. It isn’t. AG-UI rides on top of HTTP and WebSocket. It doesn’t replace them. Understanding where each layer starts and stops is the key to debugging, optimizing, and building correctly with it.
[... 2,095 words]HTTP vs MCP vs A2A vs AG-UI: The Four Protocols of AgentCore Runtime
When you deploy an agent to AWS AgentCore Runtime, you pick a protocol: HTTP, MCP, A2A, or AGUI. This choice determines how your agent talks to the outside world: what it receives, what it sends back, and who it talks to. All four run on identical infrastructure. The differences live entirely in the framing and application layers.
[... 2,407 words]All Four AgentCore Protocols Are Just HTTP: What AG-UI, MCP, and A2A Actually Do
A question that appears once you understand how AG-UI works: isn’t this just HTTP streaming with a defined event format? Could you achieve the same thing with the HTTP protocol if you defined the same output structure?
[... 1,469 words]April 5, 2026
HTTP vs AG-UI: What Actually Changes in Your React Code
One question appears after you understand how AG-UI works: isn’t this just HTTP streaming with a defined event format? Could you achieve the same thing with the HTTP protocol if you defined the same output structure?
[... 1,467 words]AgentCore Auth from First Principles: How JWT Flows from Browser to Agent Container
Suppose you deploy a React frontend on S3+CloudFront that talks directly to AWS AgentCore Runtime. No API Gateway, no Lambda proxy. Is that secure? We traced every byte from browser to agent container to answer that question.
[... 1,430 words]April 9, 2026
I Built an Agent in 5 Minutes: Anthropic Managed Agents vs AWS AgentCore + Strands
A side-by-side look at two very different bets on what “agent infrastructure” should mean.
[... 1,670 words]Beyond Tool Calling: A Practical Tour of Advanced MCP Concepts
If you used MCP for a few weeks, you already know the basics. A server exposes tools, resources, and prompts. A client (usually an LLM-driven agent) calls them. That mental model gets you surprisingly far. But it also flattens MCP into “just tool calling.” You start to wonder what makes the protocol more interesting than a plain JSON-RPC schema.
[... 2,870 words]April 14, 2026
AgentCore Registry: The Missing Yellow Pages for AI Agents
How we stopped hardcoding ARNs. What we learned when we published an MCP server and an A2A agent. The VPC-endpoint footgun that shipped into every team’s first demo.
[... 2,484 words]April 23, 2026
MCP Apps Explained: How AI Agent Shows Live Widgets Inside the Chat
I built a greeting card generator and got confused. The AI agent showed a real card with buttons inside the chat, and I couldn’t understand why. Here’s what I learned. I explain it the way I wanted someone to explain it to me.
[... 2,162 words]April 24, 2026
AgentCore Harness, Inside Out
What actually runs when AWS says “declarative agents”, and when it is the right tool.
[... 2,589 words]