> For the complete documentation index, see [llms.txt](https://guides.regen.network/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://guides.regen.network/guides/cosmos-ecosystem/cosmos-basics/cosmos-sdk.md). # Cosmos SDK *The* [*Cosmos SDK*](https://github.com/cosmos/cosmos-sdk) *is an open-source framework for building multi-asset public* [*Delegated Proof-of-Stake (dPoS)*](/guides/cosmos-ecosystem/blockchain-basics/glossary-of-terms.md#delegated-proof-of-stake) *blockchains, like the Cosmos Hub, as well as permissioned Proof-of-Authority (PoA) blockchains.* The goal of the Cosmos SDK is to allow developers to easily launch custom blockchains that can natively interoperate with other Cosmos blockchains. Blockchains built with the Cosmos SDK are generally referred to as [application-specific blockchains](/guides/cosmos-ecosystem/blockchain-basics/glossary-of-terms.md#application-specific-blockchain). In the traditional blockchain model, decentralized Apps (dApps) are built on top of an existing blockchain as a set of programs called a [smart contracts](/guides/cosmos-ecosystem/blockchain-basics/glossary-of-terms.md#smart-contracts). This model can be very limiting, and often falls short for building complex decentralized platforms. An application-specific blockchain is a blockchain customized to operate a single application: developers have all the freedom to make the design decisions required for the application to run optimally. Building applications this way provides more flexibility to the developers, and can increase performance, sovereignty and security. {% hint style="info" %} Fun fact: Cosmos SDK is maintained in part by a group of developers at Regen Network Development, Inc (RND)! {% endhint %} --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://guides.regen.network/guides/cosmos-ecosystem/cosmos-basics/cosmos-sdk.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.