> For the complete documentation index, see [llms.txt](https://polylith.gitbook.io/polylith/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://polylith.gitbook.io/polylith/introduction.md).

# Introduction

- [Sharing code](https://polylith.gitbook.io/polylith/introduction/sharing-code.md)
- [Testing incrementally](https://polylith.gitbook.io/polylith/introduction/testing-incrementally.md)
- [Polylith in a Nutshell](https://polylith.gitbook.io/polylith/introduction/polylith-in-a-nutshell.md): Polylith is a software architecture that simplifies our backend services and tools by enabling us to construct them as “modular monoliths” using composable building blocks.