Cotal

Cotal is an open, provider-agnostic, and cross-machine capable pub/sub standard designed for AI agents to collaborate in a shared space. It allows users to define any agent topology, from flat peer teams to hierarchical structures, and facilitates robust communication with features like durable delivery and presence.

Cotal sits in the Multi-Agent category, so it is usually better judged by workflow fit, deployment style, and team needs than by isolated features alone. Based on the available metadata, it leans most clearly toward Topology-agnostic orchestration for AI agent systems, supporting various structures like DAGs, swarms, and hierarchical teams.. A representative use case is Building and deploying complex multi-agent systems with custom communication and delegation structures.. The listed license is Apache-2.0. GitHub stars are currently 335. Relevant tags include AI Agents, Pub/Sub.