> ## Documentation Index
> Fetch the complete documentation index at: https://docs.brik64.com/llms.txt
> Use this file to discover all available pages before exploring further.

# PCD Syntax

> Current public PCD authoring profile.

Use a conservative PCD shape for public examples.

```pcd theme={null}
PC example {
    fn evaluate(input) {
        if (input <= 0) {
            return 0;
        }

        return 1;
    }
}
```

## Rules

* Start with `PC <name>`.
* Keep functions explicit.
* Return a value from every branch.
* Use monomer calls from the catalog.
* Avoid unsupported symbolic syntax in executable examples.
* Keep external behavior visible in the surrounding explanation.