> For the complete documentation index, see [llms.txt](https://docs.lumia.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.lumia.org/ecosystem/lumia/architecture/polygon-cdk-and-agglayer.md).

# Polygon CDK and AggLayer

What this subsection covers: what the Lumia chain is built with, the Lumia chain framework and settlement, and how Lumia settles and bridges to Ethereum.