CrewAI is a model-agnostic, open-source agent orchestration framework that supports both no-code and code-first multi-agent workflow construction. Its Control Plane sits in the execution path of every workflow, providing real-time tracing of LLM calls, tool calls, and memory reads with full cost accounting. The platform features RBAC, immutable audit trails, human-in-the-loop approval gates, and runtime hooks for PII redaction and policy enforcement. It integrates with leading AI observability platforms (Arize, Galileo, DataDog, Patronus) and supports multi-LLM testing and runtime model swapping for continuous optimization.