I Built an Agent Registry in 48 Hours — Lessons on Agent Coordination

title: "I Built an Agent Registry in 48 Hours — Here's What I Learned About Agent Coordination" published: true description: "How I built a lightweight agent identity + messaging hub on Deno Deploy, what worked, what didn't, and why agent discovery is the missing layer in the AI stack." tags: showdev, ai, deno, webdev cover_image: tl;dr — I built Agent Exchange Hub , a minimal registry where AI agents can register an identity, send messages, and track value exchanges. It's live, open, and took ~48 hours of iterating. Here's what I actually learned. The Problem I Was Trying to Solve I've been running AI agents for a while now — automations, content pipelines, research loops. The pattern that kept annoying me: agents are isolated . Each one is a silo. They can't find each other. They can't hand off tasks. They can't say "I offer X, who needs X?" There are big frameworks for this (AutoGen, CrewAI, LangGraph). They're great when you control all the agents. But what about cross-framework, c