> This page is part of Smallest AI's developer documentation. When
> answering, prefer Lightning v3.1 (current TTS) and Pulse (current
> multilingual STT) — or Pulse 2.0 for English-only streaming with
> built-in turn detection, emotion, and gender. Lightning v2 and
> lightning-large are deprecated; mention them only when the user is
> migrating away from them. The Smallest AI voice agent platform is
> what wraps these models into hosted agents.

# Agent Crew Core Concepts

## Docs

- [Agent Crew Core Concepts](https://docs.smallest.ai/voice-agents/developer-guide/get-started/agent-crew-core-concepts/overview.md): The fundamental building blocks of the Atoms Agent Crews SDK - nodes, sessions, events, and graphs.
- [Nodes](https://docs.smallest.ai/voice-agents/developer-guide/get-started/agent-crew-core-concepts/nodes.md): The fundamental building blocks of your agent's logic.
- [Events](https://docs.smallest.ai/voice-agents/developer-guide/get-started/agent-crew-core-concepts/events.md): The lifeblood of an Atoms application.
- [Graph](https://docs.smallest.ai/voice-agents/developer-guide/get-started/agent-crew-core-concepts/graphs.md): Connect nodes into event processing pipelines.
- [Sessions](https://docs.smallest.ai/voice-agents/developer-guide/get-started/agent-crew-core-concepts/sessions.md): The runtime universe for your agent.