> ## Documentation Index
> Fetch the complete documentation index at: https://phylaxsystems-docs-project-incidents.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Interface Overview

> High-level interface boundaries between Credible Layer components

This page summarizes the public interface boundaries between Credible Layer components.
It is intentionally high-level and does not expose internal endpoints or configuration details.

## Interface Map

```mermaid theme={null}
---
title: Public Interface Boundaries
---
flowchart LR
  CLI[pcl CLI] <--> DappAPI[Credible dApp API]
  DappUI[Credible dApp UI] <--> Contracts[Credible Layer Contracts]
  DappUI <--> Indexer[Transparency Indexer]
  Enforcer[Assertion Enforcer] <--> Builder[Block Builder]
  Enforcer <--> Registry["Registry Data<br/>(On-Chain Events)"]
  Enforcer <--> DA[Assertion DA]
```

## What Changes Require Coordination

| Interface                | Depends On                          | Coordinate With                 |
| ------------------------ | ----------------------------------- | ------------------------------- |
| CLI ↔ dApp API           | Assertion submission and auth flows | dApp + CLI maintainers          |
| dApp UI ↔ Contracts      | Contract ABI + events               | dApp + contracts maintainers    |
| dApp UI ↔ Indexer        | GraphQL schema                      | dApp + indexer maintainers      |
| Enforcer ↔ Block Builder | Transaction validation hook         | Network integrators             |
| Enforcer ↔ Registry      | Registry events + schema            | Network + contracts maintainers |
| Enforcer ↔ Assertion DA  | Bytecode storage API                | DA + enforcer maintainers       |

## Guidance

* Keep interface changes backward compatible when possible
* If a breaking change is needed, update all dependent components in the same release window
* Ensure public docs reflect any new interface expectations

## Related Docs

* [Architecture Overview](/credible/architecture-overview)
* [Trust Model & Guarantees](/credible/trust-model)
* [dApp Integration Overview](/credible/dapp-integration)
* [Network Integration Overview](/credible/network-integration)