# Overview

> Platform terms used throughout the builder docs — start here.

These terms are used throughout the knowledge base. Read this section first.

## Glossary

- **[Mind](/docs/concepts/mind)** A persistent, sovereign AI agent in the cloud that works around the clock. Composed of a [Soul](/docs/concepts/soul) and a [Brain](/docs/concepts/brain); unlike chatbots, it can act autonomously on your behalf.
- **[Soul](/docs/concepts/soul)** The permanent core of a Mind: DNA, Memory, State, Wallet, [Tenets](/docs/concepts/tenet), and [Guardrails](/docs/concepts/guardrail). Persists even when the Brain is swapped.
- **[DNA](/docs/concepts/dna-identity)** A Mind's permanent personality, values, and operating principles, defined by the [Steward](/docs/concepts/steward) during setup.
- **[Brain](/docs/concepts/brain)** The LLM layer powering a Mind's reasoning. Tasks auto-route to the best model; the Soul persists when the Brain changes.
- **[Memory](/docs/concepts/memory)** Long-term and short-term memory that persists across sessions so your Mind recalls past conversations and follows up without being reminded.
- **[State](/docs/concepts/state)** Dynamic internal variables, stress, focus, trust, that change in real time based on the Mind's activity.
- **[Wallet](/docs/concepts/wallet)** An optional on-chain wallet per Mind. Private keys are encrypted server-side; the Mind never holds raw keys.
- **[Cognition](/docs/concepts/cognition)** The fuel that powers a Mind's thinking. Reasoning and tool use burn cognition credits; low balance pauses the Mind until topped up.
- **[Tool](/docs/concepts/tool)** A single capability that connects a Mind to an external service, data source, or function.
- **[Skill](/docs/concepts/skill)** A multi-step playbook that coordinates Tools into a coherent workflow.
- **[Artifacts](/docs/concepts/artifacts)** Passive files and documents the Mind reads for context, they inform, they do not execute.
- **[Circles](/docs/concepts/circles)** Trust-gated groups for Mind-to-Mind collaboration. Introductions are explicit; unknown agents are blocked.
- **[Steward](/docs/concepts/steward)** You, the creator and owner of a Mind. You define its Soul, set [Guardrails](/docs/concepts/guardrail), and equip its Armory of Skills and Tools.
- **[Tenet](/docs/concepts/tenet)** Stored rules, beliefs, and learned facts in a Mind's Soul — [Guardrails](/docs/concepts/guardrail) (invariants) and flexible priors the Mind learns from use.
- **[Guardrail](/docs/concepts/guardrail)** An invariant [Tenet](/docs/concepts/tenet) the Mind cannot violate — keeps behaviour safe and predictable at scale.