AI Agent
Also called Agent, LLM agent
A system that uses a model, tools, context, and control logic to pursue a goal and take actions.
AI dictionary · 145 definitions
Plain-English definitions for agents, tools, RAG, evals, safety, and the vocabulary that shows up in AI product work.
Also called Agent, LLM agent
A system that uses a model, tools, context, and control logic to pursue a goal and take actions.
Also called Agentic system, Compound AI system
AI that plans, uses tools, receives feedback from the environment, and can act with partial autonomy.
Also called Harness, Agent runtime
The runtime around a model that supplies tools, state, prompts, permissions, logs, and execution loops.
Also called Agent harness engineering, Harness design
The practice of designing, testing, and simplifying the runtime around an agent so it can work reliably across tools, sessions, and tasks.
Also called Harness-compute separation, Brain/hands split, Model-sandbox separation
Separating the model-and-harness layer that decides what to do from the sandbox, tools, or systems that perform actions.
Also called Run loop, Think-act-observe loop
The repeated cycle where an agent reasons, calls a tool, observes the result, and decides the next step.
Also called Long-running task, Extended task
A goal that requires many dependent steps, decisions, tool calls, and course corrections before completion.
Also called Persistent agent, Background agent
An agent designed to keep making progress over many sessions, context windows, or wall-clock hours.
Also called Async response, Background run
An execution mode where a long-running AI task continues asynchronously while the application polls for status or results.
Also called Swarm, Agent fleet
A group of agents that coordinate or compete to solve pieces of a larger goal.
Also called /goal, Goal command, Persistent goal
An emerging coding-agent workflow where a persistent objective stays active across progress checks, continuation, pause, and resume.
Also called Resumable workflow, Persistent execution
Saving workflow progress so an agent or graph can pause, fail, or wait for a person and later resume without redoing completed steps.
Also called Pause point, Mid-task approval
A deliberate pause inside an agent workflow that waits for external input before continuing.
Also called MAS, Agent collective
An architecture where multiple specialized agents collaborate through messages, tools, or a shared controller.
Also called Manager agent, Orchestrator agent
A coordinating agent that decomposes work, invokes specialists, and combines their outputs.
Also called Worker agent, Specialist agent
A focused agent invoked by another agent or workflow to handle a narrower task.
Also called Agent tool, Callable agent
A pattern where one agent exposes a specialist agent as a callable tool instead of handing over the whole conversation.
Also called Teammates, Peer agents
Multiple agent sessions coordinated around shared work, often with peer messaging, task assignment, or separate context.
Also called Transfer, Agent transfer
A controlled transfer of a task or conversation from one agent to another.
Also called Manager-worker workflow, Delegation workflow
A pattern where a central model dynamically breaks work into subtasks and delegates them to worker models.
Also called Critic loop, Review-and-revise loop
A workflow where one model produces work and another model evaluates it, creating an improvement loop.
Also called HITL, Human approval
A design where a person reviews, approves, or edits model output before a consequential action happens.
Also called Oversight, Supervisory control
A design where humans monitor autonomous systems and intervene when risk, uncertainty, or policy requires it.
Also called Autonomy tier, Agency level
A way to describe how much freedom an agent has to decide, act, spend money, or change systems.