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Why we built four agents instead of one

Leo Marsh · 8 Oct 2026 · 8 min read

One agent that does everything sounds simpler. In practice, specialists are faster, cheaper and easier to trust.

When we started, Relay had a single agent. It could do almost anything, and it did most things a little worse than it should have.

Specialists know their tools

An agent that only reconciles numbers learns the quirks of Stripe exports and spreadsheet formulas. An agent that only writes learns your tone. Each gets better at less.

“Trust grows faster when you know who did the work.”

Handoffs make them a team

Big errands pass between agents now, so you still describe the job once. You just get specialists on every part of it.

Keep reading

Hand over yourfirst errand

Connect one tool, describe one job, and see it done before your coffee goes cold.