Two agents, two jobs: a builder and a checker sharing a message board
A builder shares a two-agent setup that has survived real use: one agent writes and runs everything, while a second checker reviews every result before it goes anywhere. The two do not share a chat; they post to a numbered message board on the builder's machine, and a single file holding the last post number fixed a bug where the builder kept skipping instructions. In two weeks the pair produced 1,275 posts with only 12 from the human.