fleet
The crowd itself: several agents on slices of one question, blind to each other, each writing its own file.
A fleet is the crowd: several agents launched at once, each working a slice of the same question. They do not talk to each other, they do not share notes, and each one writes its findings to its own file. That isolation is not a limitation. It is the feature. When agents that could not coordinate come back agreeing, the agreement is evidence.
The thing to remember about fleets is that they are a tool for a shape of question, not an upgrade over one agent. If the slices are independent, a fleet is faster, wider, and harder to fool. If each step feeds the next, a fleet makes things worse, and one agent thinking for a long time wins. Parallelism is a property of the question. Owning a fleet is not a reason to use it.