> For the complete documentation index, see [llms.txt](https://docs.coherence.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.coherence.io/1.2/coherence-sdk-for-unity/networking-state-changes/sync-and-command-attributes.md).

# \[Sync] and \[Command] Attributes

Aside from configuring your CoherenceSync bindings from within the Configure window, it's possible to use the `[Sync]` and `[Command]` C# attributes directly on your scripts. Your prefabs will get updated to **require** such bindings.

## Sync Attribute

Mark **public** fields and properties to be synchronized over the network.

```csharp
[Sync]
public int health;
```

It's possible to migrate the variable automatically, if you decide to change its definition:

```csharp
[Sync("health")]
public float hp;
```

## Command Attribute

Mark **public** methods to be invoked over the network. Method return type must be `void`.

```csharp
[Command]
public void Heal(int amount)
{
    ...
}
```

It's possible to migrate the command automatically, if you decide to change the method signature:

```csharp
[Command("Heal", typeof(int))]
public void IncreaseHp(float hp)
{
    ...
}
```

{% hint style="warning" %}
Note that **marking** a command attribute only marks it as programmatically usable. It does not mean it will be automatically called over the network when executed.

You still need to follow the guidelines in the [Messaging with Commands](/1.2/coherence-sdk-for-unity/networking-state-changes/commands.md) article to make it work.
{% endhint %}


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.coherence.io/1.2/coherence-sdk-for-unity/networking-state-changes/sync-and-command-attributes.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.