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

# Packages

> The Cosmos SDK is a collection of Go modules. This section provides documentation on various packages that can used when developing a Cosmos SDK chain. It lists all standalone Go modules that are part of the Cosmos SDK.

The Cosmos SDK is a collection of Go modules. This section provides documentation on various packages that can used when developing a Cosmos SDK chain.
It lists all standalone Go modules that are part of the Cosmos SDK.

<Tip>
  For more information on SDK modules, see the [SDK Modules](/sdk/v0.53/build/modules) section.
  For more information on SDK tooling, see the [Tooling](/sdk/v0.53/build/tooling) section.
</Tip>

## Core

* [Core](https://pkg.go.dev/cosmossdk.io/core) - Core library defining SDK interfaces ([ADR-063](/sdk/v0.53/build/architecture/adr-063-core-module-api))
* [API](https://pkg.go.dev/cosmossdk.io/api) - API library containing generated SDK Pulsar API
* [Store](https://pkg.go.dev/cosmossdk.io/store) - Implementation of the Cosmos SDK store

## State Management

* [Collections](/sdk/v0.50/build/packages/collections) - State management library
* [ORM](/sdk/v0.50/build/packages/collections) - State management library

## Automation

* [Depinject](/sdk/v0.50/build/packages/depinject) - Dependency injection framework
* [Client/v2](https://pkg.go.dev/cosmossdk.io/client/v2) - Library powering [AutoCLI](/sdk/v0.53/learn/advanced/autocli)

## Utilities

* [Log](https://pkg.go.dev/cosmossdk.io/log) - Logging library
* [Errors](https://pkg.go.dev/cosmossdk.io/errors) - Error handling library
* [Math](https://pkg.go.dev/cosmossdk.io/math) - Math library for SDK arithmetic operations

## Example

* [SimApp](https://pkg.go.dev/cosmossdk.io/simapp) - SimApp is **the** sample Cosmos SDK chain. This package should not be imported in your application.