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

# Cosmos SDK Documentation

> Version: v0.53

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="Overview" icon="book-open" href="/sdk/v0.53/learn/intro/overview">
    Understand the fundamentals of Cosmos SDK, application-specific blockchains, and the SDK's architecture.
  </Card>

  <Card title="Fundamentals" icon="graduation-cap" href="/sdk/v0.53/learn/beginner/app-anatomy">
    Learn essential concepts including application anatomy, transaction lifecycles, accounts, and gas mechanics.
  </Card>

  <Card title="In-Depth Concepts" icon="microscope" href="/sdk/v0.53/learn/advanced/baseapp">
    Explore core components, security models, execution patterns, and advanced architectural concepts.
  </Card>

  <Card title="Build a Chain" icon="link" href="/sdk/v0.53/build">
    Create blockchain applications with guides on app development, ABCI, testing, and SDK packages.
  </Card>

  <Card title="Build a Module" icon="box" href="/sdk/v0.53/build/building-modules/intro">
    Develop custom modules with comprehensive guides on module architecture, message handling, and state management.
  </Card>

  <Card title="Run a Node" icon="server" href="/sdk/v0.53/tutorials">
    Set up, configure, and maintain nodes from local development environments to production deployments.
  </Card>
</CardGroup>