# Build with XMTP > Build secure messaging with XMTP and a backend you run. ## Documentation Sets - [Abridged documentation](https://xmtp.org/llms-small.txt): a compact version of the documentation for Build with XMTP, with non-essential content removed - [Developer guide](https://xmtp.org/llms-full.txt): SDK guides, app examples, and deployment instructions. Start here for app development. - [Specs](https://xmtp.org/llms-specs.txt): Protocol requirements. Load only for protocol or implementation work. ## Notes - Start with the developer guide. Load the specs separately for protocol requirements. - The content is automatically generated from the same source as the official documentation