> ## Documentation Index
> Fetch the complete documentation index at: https://agentcontrol-docs-add-source-code-notes-to-examples.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Engine

> Core evaluation engine for Agent Control.

The engine is the runtime that evaluates controls, resolves selectors, and runs evaluators.

## Responsibilities

* Evaluator discovery via Python entry points
* Selector evaluation and payload extraction
* Evaluator execution and result aggregation
* Cached evaluator instances for performance

## Evaluator Discovery

```python theme={null}
from agent_control_engine import discover_evaluators, list_evaluators

discover_evaluators()
print(list_evaluators())
```

For evaluator details, see [Evaluators](/evaluators).