How to Run Multiple Claude Code Agents at Once (2026)
Run multiple Claude Code agents at once, plus Codex and Agy, from one terminal: a free one-command herdr setup with 3-keystroke launchers and a fleet CLI.
$ ls ~/blogs/engineering --sort=latest # my take, in writing
I explain the part that breaks.
System design, performance, DevOps and AI tooling. I put the details in writing. Saves me explaining them twice.
8 postsMy engineering essays / newest first
$ ls ~/write/engineering
my essays on the subjectI put it all here.
The Real Bottleneck at 1 Million RPS
A real 1M req/sec benchmark on AWS. The database broke exactly once. Here's what broke the other four times, and what actually fixed each one.
How Claude and Codex Learned to Tag Each Other
Block's Buzz gives AI coding agents their own keypairs and channel membership. A code-level walkthrough of how one agent wakes another up, with no orchestrator.
Find out where your latency actually goes
A measurement procedure that tells you which layer of your stack owns the delay, before you optimize the wrong one. Worked through on a system that turned out to be 98% network.
Serve Static Files with Nginx Without Breaking MIME Types
Nginx serves your HTML fine but hands back CSS as text/plain. Why the obvious types{} fix breaks HTML, and what to use instead.
MCP: The USB-C of AI, Explained Properly
MCP is called the USB-C of AI. What that analogy actually means, why AI tool calling needed a standard, and what MCP still does not solve for you.
One Server Per Customer Domain Doesn't Survive Scale
Per-customer TLS breaks past a few hundred domains. How a shared edge resolves millions of custom hostnames: the registration payload, priority rules, and the RFC forcing an apex workaround.
GitHub Actions: Automate Tests, Deploys and npm Publishing
A hands-on guide to GitHub Actions: local testing with act, automated test/deploy/npm-publish workflows, cron schedules, custom actions, and 2026 platform updates.