> ## 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.

# Cosmos SDK Docs

> Version: v0.54

The Cosmos SDK is the most widely adopted, battle-tested Layer 1 blockchain stack, trusted by 200+ chains live in production. This modular framework enables you to build secure, high-performance blockchains with comprehensive guides covering everything from core concepts to advanced implementation patterns.

<CardGroup cols={2}>
  <Card title="Start Here" icon="play" href="/sdk/latest/learn/start-here">
    New to the Cosmos SDK? Find the right starting point based on your background and what you want to build.
  </Card>

  <Card title="Concepts" icon="graduation-cap" href="/sdk/latest/learn/concepts/accounts">
    Learn essential concepts including application anatomy, transaction lifecycles, accounts, and gas mechanics.
  </Card>

  <Card title="Quickstart" icon="link" href="/sdk/latest/tutorials/example/00-overview">
    Build and run a Cosmos chain from scratch, with step-by-step guidance from setup to a working custom module.
  </Card>

  <Card title="Build a Module" icon="box" href="/sdk/latest/tutorials/example/03-build-a-module">
    Develop custom modules with comprehensive guides on module architecture, message handling, and state management.
  </Card>

  <Card title="Run a Node" icon="server" href="/sdk/latest/tutorials">
    Set up, configure, and maintain nodes from local development environments to production deployments.
  </Card>

  <Card title="Overview" icon="book-open" href="/sdk/latest/learn/intro/overview">
    Understand the fundamentals of Cosmos SDK, application-specific blockchains, and the SDK's architecture.
  </Card>
</CardGroup>