Describing Agentic AI Systems with C4: Lessons from Industry Projects

Researchers propose a new C4-based documentation framework specifically designed for agentic AI systems, which operate through specialized agents collaborating via artifact exchange and tool invocation. The approach provides structured modeling vocabulary and hierarchical description techniques to capture the unique architectural patterns of these systems for industrial applications.

• →Agentic AI systems require specialized documentation practices different from traditional software architectures due to their agent-based collaboration patterns.
• →The proposed C4-aligned framework provides structured vocabulary for documenting agents, artifacts, tools, and coordination patterns across abstraction levels.
• →Industrial experience shows that proper documentation of agentic systems supports better maintainability and sustained evolution in production environments.
• →Traditional code sketches and pipeline drawings are insufficient for documenting the complex interaction patterns in agentic AI systems.
• →The framework addresses the growing need for standardized architectural documentation as agentic AI systems become long-lived industrial solutions.