Pattern: The 'SuperAgent Harness' Is Converging on a Fixed Shape — Lead Agent + Parallel Subagents + Sandboxes + Message Gateway

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DeerFlow (71K stars), CowAgent (zhayujie/CowAgent, 45K stars), and BitFun (GCWing/BitFun) independently converge on the same architecture: a lead/orchestrator agent that decomposes a task, spawns subagents in parallel, isolates execution in sandboxes, and coordinates via a message gateway plus shared memory and skills. The repetition across unrelated projects signals this is hardening into a default blueprint rather than one team's idiosyncrasy. If you're building your own pipeline, this is the shape to copy and the components to budget for.