LLM: Large Language Model—generative models that serve as the reasoning core for AI agents
Agent: A compound software system inclusive of AI models that operates within an environment and executes actions (tools) to fulfill requests
Agency: The capacity to act intentionally; determined by the set of tools and capabilities an agent possesses (e.g., ability to browse the web)
Autonomy: The extent to which an agent is *designed* to operate without user involvement; a design decision separate from agency
L1 (Operator): Level 1 Autonomy: User drives planning and decision-making; agent provides on-demand support (e.g., 'copilot')
L2 (Collaborator): Level 2 Autonomy: User and agent work in parallel on shared tasks; frequent communication and direct user editing of agent plans
L3 (Consultant): Level 3 Autonomy: Agent leads planning but proactively solicits user feedback and preferences before critical steps
L4 (Approver): Level 4 Autonomy: Agent executes independently and only pauses for critical blockers or final sign-off
L5 (Observer): Level 5 Autonomy: Agent operates fully independently; user only monitors logs and holds an emergency off-switch