---
title: DevTools
description: "A visual inspector for your agent's belief state."
---

<Callout type="warning" title="Coming soon">
<code>@beliefs/devtools</code> is in development. This page describes the planned tool.
</Callout>

## What It Provides

A browser-based inspector for your agent's belief state. See claims, confidence, evidence, contradictions, the ledger, and clarity in real time as your agent runs.

## Planned Features

- **Claim timeline.** Watch claims appear and update across turns.
- **Confidence history.** See how confidence changes as evidence accumulates.
- **Ledger viewer.** Trace any belief back to its origin.
- **Clarity breakdown.** Inspect each component of the clarity score.
- **Contradiction highlighter.** See conflicts as they are detected.

## Integration

One line in your development setup:

```ts
import { BeliefDevTools } from '@beliefs/devtools'

// Wrap your beliefs instance
const beliefs = new Beliefs({
  apiKey: process.env.BELIEFS_KEY,
  agent: 'research-agent',
  namespace: 'devtools-demo',
  writeScope: 'space',
})
BeliefDevTools.attach(beliefs)
```

The inspector opens in a separate browser panel. It does not affect your agent's runtime.

## Request Early Access

If you want to try DevTools before the public release, [request access](/dev/beta).