> ## 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.

# Monomers

> BRIK64 monomer overview.

Monomers are atomic BRIK64 operations used to express bounded circuit logic.

They are the vocabulary agents should use when turning requirements into PCD.

## Core-First Guidance

```text theme={null}
Core-first. Extended only when necessary and explicitly justified.
```

## How To Use This Section

1. Read [Core And Extended Monomers](/monomers/core-vs-extended).
2. Use [Monomer Tutorial](/monomers/tutorial) for examples.
3. Use [Selection Guide](/monomers/selection-guide) before generating PCD.
4. Inspect [Monomer Catalog](/monomers/catalog) for IDs and names.

## Agent Questions

* Which operation is needed?
* Does a core monomer express it?
* Is external behavior involved?
* Which family does the monomer belong to?
* How will the result be composed through EVA?

Do not invent helpers when a catalog monomer expresses the operation clearly.