A coordinator does not do the actual work itself. It reads the goal, writes a plan, spawns specialists in parallel, waits for results, then chains follow-up agents (a writer, an editor) to produce the final output. Running the coordinator on a premium model and the workers on a cheap model is the single biggest cost lever in agent design.
Engineering notes from the Digitorn team. No marketing, no launch announcements, no "10 prompts that will change your life". Just the things we write that we'd want to read.