# Write your own

{% hint style="success" %}
This is the official documentation of the `agent_ruby` Ruby agent.
{% endhint %}

Each Plugin is nothing more than a `class` that implements our `Plugin abstract class` and can perform customizations at either Agent level, Collection level, or both.

```ruby
class RemoveTimestamps < ForestAdminDatasourceCustomizer::Plugins::Plugin
  def run(datasource, collection, options)
    # ... call customization methods here
  end
end
```

3 parameters are provided:

| Name       | Description                                                                                                                                                                                               |
| ---------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| dataSource | An object that allows customizing the whole agent. It has the same interface than the `Agent` you manipulate outside of Plugins                                                                           |
| collection | An object that allows customizing the collection that the Plugin was called from (`nil` if the Plugin was called on the Agent). It is the same object than is passed when you call `customize_collection` |
| options    | An array of options that are provided to the Plugin. Each Plugin will provide specific mandatory or optional options.                                                                                     |

### Making your Plugin act differently depending on the Collection

When making a Plugin, you may want it to generalize to many different Collections.

This can be achieved by adopting different behavior depending on the `schema` of the Collection being targeted.

```ruby
class RemoveTimestamps < ForestAdminDatasourceCustomizer::Plugins::Plugin
  def run(datasource, _collection, _options)
    datasource.collections.each do |current_collection|
      if current_collection.schema[:fields]['createdAt']
        current_collection.remove_field('createdAt')
      end

      if current_collection.schema[:fields]['updatedAt']
        current_collection.remove_field('updatedAt')
      end
    end
  end
end
```


---

# Agent Instructions: 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:

```
GET https://docs.forestadmin.com/developer-guide-agents-ruby/agent-customization/plugins/custom.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
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.