# Manage

The Manage section provides visibility into your Osprey configuration: the rules and features that power your detection, the functions available to query and rule authors, and tools to understand how everything connects.

## Rules Visualizer

The Rules Visualizer shows how rules and labels relate to one another in a dependency graph. It's useful for understanding what will fire when a particular label is applied, or what conditions must be true for a label to be produced.

![The Rules Visualizer page with its search box open, offering Actions and Labels categories, before anything is selected](../images/rules-visualizer.png)

To use it, search for an action or label in the search box. A graph appears showing the upstream and downstream relationships for your selection. You can toggle upstream and downstream visibility independently.

Node types in the graph:
- **Red ellipse**: a label that is upstream of a rule (an input condition)
- **Blue rectangle**: a rule
- **Green ellipse**: a label that is downstream of a rule (an output)

Hovering over a node shows its source file path. The graph supports zoom and pan to navigate large dependency trees.

## UDF Registry

The UDF Registry is an auto-generated API reference for every user-defined function (UDF) available in Osprey. It updates dynamically as UDFs are added or modified in code, so it always reflects what's actually available.

![The UDF Registry listing available functions with type signatures and descriptions, grouped by category](../images/udf-documentation.png)

UDFs are organized by category and are searchable. Each entry shows:
- Function signature with syntax highlighting
- Description of what the function does
- Parameter names, types, and descriptions
- Return type

Use this page as your reference when writing rules, to confirm a function's exact name and parameter order. Note that most UDFs are for rules only: the query box supports just four functions (`RegexMatch`, `DidAddLabel`, `DidRemoveLabel`, `DidDeclareVerdict`), so using any other UDF in a query currently fails with a silent 500 error.

## Features Registry

The Features Registry lists every feature defined in your Osprey deployment. Features are named variables extracted from events; they're what you query against and what rules operate on.

The list is paginated (50 per page) and can be filtered and sorted:

- **Search**: filter by name, category, or description
- **Category filter**: narrow to a specific feature category
- **Extraction function filter**: narrow to features using a specific extraction function
- **Unused only**: show only features not referenced by any rule
- **Sort**: by name, most referenced, or least referenced

Each row shows the feature's name, category, extraction function(s), reference count (how many rules use it), description, owner, and last modified date.

## Rules Registry

The Rules Registry lists every rule loaded in your Osprey deployment.

The list is paginated (50 per page) and can be filtered and sorted:

- **Search**: filter by name, source file, or description
- **Unused only**: hide rules that are referenced by other (when-)rules, showing only "leaf" rules
- **Sort**: by name, most referenced, or least referenced

Each row shows the rule's name, source file, description, reference count, and line number within the source file.