# NO_PROGRAM

The file defines no strategy class and no library names in __all__.

## What happened

A file must define one class that subclasses `fg.Strategy`, or be a library that lists its public names in `__all__`. This one is neither.

## What to do

Define a strategy class, or add an `__all__` list of the names the file offers.

## Example

```text
strategy.py, line 1: Define one class that subclasses fg.Strategy, or list a library's public names in __all__. [NO_PROGRAM]
```

The wording of the message depends on your file, and the code does not. An error stops the file from loading.