# Checking for Dependencies

## Manfiest File

Using a Manifest File to check for dependencies is the preferred route if your plugin **requires** another to work.

Learn how to set dependencies in Manifest files here: [Manifest](/1.0.0/dev/plugins/manifest.md#dependencies)

## Using PluginManager

PluginManager allows you to check if a plugin is running. This is the preferred route if your plugin **does not require, but can use** features from another plugin.

For example, if you have a feature that links in with another plugin, but does not require the plugin to be installed for yours to work.

This is great for optional features.

Learn more here: [Check if a plugin is loaded.](/1.0.0/dev/libraries-and-functions/pluginmanager/check-if-a-plugin-is-loaded..md)


---

# 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.saturncms.net/1.0.0/dev/plugins/checking-for-dependencies.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.