Every time you add an agent to a system, you pay a tax. Not in compute. Not in tokens. In coordination.

This tax is invisible on architecture diagrams. It doesn’t show up in latency benchmarks. But it kills multi-agent systems more reliably than any single point of failure ever could.

The Mythical Agent-Month#

There’s a famous observation in software engineering: adding people to a late project makes it later. The reason isn’t that new engineers are bad. It’s that every new person creates communication channels. Two people need one channel. Three need three. Ten need forty-five. The math is brutal and it scales quadratically.