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

# Package reference

> Choose the Engram package needed for contracts, capture, providers, Studio, or command-line workflows.

Engram defines six synchronized npm packages.

| Package                                                                                      | Purpose                                                                  |
| -------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------ |
| [`@engramviz/core`](https://www.npmjs.com/package/@engramviz/core)                           | Provider-neutral telemetry, turn contracts, schemas, and HTTP transport  |
| [`@engramviz/sdk`](https://www.npmjs.com/package/@engramviz/sdk)                             | Fail-open TypeScript turn and memory capture                             |
| [`@engramviz/adapter-mem0`](https://www.npmjs.com/package/@engramviz/adapter-mem0)           | Evidence-preserving wrapper for Mem0-like clients                        |
| [`@engramviz/adapter-langgraph`](https://www.npmjs.com/package/@engramviz/adapter-langgraph) | Evidence-preserving wrapper for LangGraph's durable Store interface      |
| [`@engramviz/studio`](https://www.npmjs.com/package/@engramviz/studio)                       | Prebuilt standalone local Studio runtime and visual assets               |
| [`@engramviz/cli`](https://www.npmjs.com/package/@engramviz/cli)                             | Local setup, Studio launcher, import, diagnostics, and regression runner |

All packages require Node.js 20 or newer and currently share version `0.2.0`.

## Typical application install

```bash theme={"dark"}
npm install @engramviz/sdk
npm install --save-dev @engramviz/cli
```

Add only the adapter that matches the application's memory boundary:

```bash theme={"dark"}
npm install @engramviz/adapter-mem0
# or
npm install @engramviz/adapter-langgraph
```

The CLI installs the Studio runtime transitively. Most applications do not need to install `@engramviz/core` or `@engramviz/studio` directly.

## Direct contract usage

Adapter and collector authors can import schemas and types from core:

```ts theme={"dark"}
import {
  MemoryTelemetryClient,
  memoryTelemetryEventSchema,
  type MemoryTelemetryEvent
} from "@engramviz/core";
```

See [Memory Telemetry v2](/reference/telemetry) before emitting provider-neutral operations directly.