# Tutorial: AutoGen Core

AutoGen Core helps you build applications with multiple **_Agents_** that can work together.
Think of it like creating a team of specialized workers (*Agents*) who can communicate and use tools to solve problems.
The **_AgentRuntime_** acts as the manager, handling messages and agent lifecycles.
Agents communicate using a **_Messaging System_** (Topics and Subscriptions), can use **_Tools_** for specific tasks, interact with language models via a **_ChatCompletionClient_** while managing conversation history with **_ChatCompletionContext_**, and remember information using **_Memory_**.
**_Components_** provide a standard way to define and configure these building blocks.


**Source Repository:** [https://github.com/microsoft/autogen/tree/e45a15766746d95f8cfaaa705b0371267bec812e/python/packages/autogen-core/src/autogen_core](https://github.com/microsoft/autogen/tree/e45a15766746d95f8cfaaa705b0371267bec812e/python/packages/autogen-core/src/autogen_core)

```mermaid
flowchart TD
    A0["0: Agent"]
    A1["1: AgentRuntime"]
    A2["2: Messaging System (Topic & Subscription)"]
    A3["3: Component"]
    A4["4: Tool"]
    A5["5: ChatCompletionClient"]
    A6["6: ChatCompletionContext"]
    A7["7: Memory"]
    A1 -- "Manages lifecycle" --> A0
    A1 -- "Uses for message routing" --> A2
    A0 -- "Uses LLM client" --> A5
    A0 -- "Executes tools" --> A4
    A0 -- "Accesses memory" --> A7
    A5 -- "Gets history from" --> A6
    A5 -- "Uses tool schema" --> A4
    A7 -- "Updates LLM context" --> A6
    A4 -- "Implemented as" --> A3
```

## Chapters

1. [Agent](01_agent.md)
2. [Messaging System (Topic & Subscription)](02_messaging_system__topic___subscription_.md)
3. [AgentRuntime](03_agentruntime.md)
4. [Tool](04_tool.md)
5. [ChatCompletionClient](05_chatcompletionclient.md)
6. [ChatCompletionContext](06_chatcompletioncontext.md)
7. [Memory](07_memory.md)
8. [Component](08_component.md)


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