> ## 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.

# Start Here

> Pick the path that matches what you want to do with the Cosmos SDK.

These docs are designed to get you building quickly. Choose the path that best matches your goal:

## What do you want to do?

* Understand how the SDK works → [Concepts + Tutorial](#learn-+-build-recommended-path)
* New to Cosmos or Blockchain? → [Start here](#new-to-cosmos)
* Build something quickly → [Quickstart](#get-running-fast)
* Run a node → [Operations](#run-a-node)
* Explore modules → [Module Directory](#browse-modules)
* Go deeper on advanced topics → [In-depth Guides](#go-deeper)

## Learn + Build (Recommended Path)

Get a solid mental model of the SDK and build your first chain.

1. Read the [intro pages](/sdk/latest/learn/intro/overview) and [Cosmos Architecture](/sdk/latest/learn/intro/sdk-app-architecture) for an overview of how a Cosmos chain is structured
2. Read the [Concepts](/sdk/latest/learn/concepts/accounts) section (Fundamentals, Modules, SDK Internals)
3. Follow the [Build a Chain Tutorial](/sdk/latest/tutorials/example/00-overview)

This is the most complete path for developers new to the Cosmos SDK.

## Get running fast

Spin up a local chain in minutes.

1. [Prerequisites](/sdk/latest/tutorials/example/01-prerequisites)
2. [Chain Quickstart](/sdk/latest/tutorials/example/02-quickstart)

From there, continue the tutorial to learn more about building modules:

* [Build a Module from Scratch](/sdk/latest/tutorials/example/03-build-a-module): write your first custom module with messages, queries, and state
* [Full Counter Module Walkthrough](/sdk/latest/tutorials/example/04-counter-walkthrough): add advanced features like fees, events, and module accounts
* [Run, Test, and Configure](/sdk/latest/tutorials/example/05-run-and-test): test your chain and configure it for different environments

## New to Cosmos?

Start here if you're new to the ecosystem.

* [The Cosmos Stack](/sdk/latest/learn/intro/cosmos-stack)
* [What is the Cosmos SDK](/sdk/latest/learn/intro/overview)

New to blockchain development? Read
[Blockchain Basics](/sdk/latest/learn/intro/blockchain-basics)

For a technical overview of how a Cosmos chain is structured:
[Cosmos Architecture](/sdk/latest/learn/intro/sdk-app-architecture)

## Run a node

Set up and operate a Cosmos node (validators, operators).

* [Run a Node](/sdk/latest/tutorials)

## Browse modules

Explore production-ready SDK modules and their documentation.

* [Module Directory](/sdk/latest/modules/modules)

## Go deeper

Dive into advanced topics like ABCI++, vote extensions, mempool design, upgrades, and observability.

* [In-depth Guides](/sdk/latest/guides/guides)