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

# Core Contracts

- [Vat](https://docs.usdd.io/developers/core-contracts/vat.md)
- [Dog](https://docs.usdd.io/developers/core-contracts/dog.md)
- [Clip](https://docs.usdd.io/developers/core-contracts/clip.md)
- [Spot](https://docs.usdd.io/developers/core-contracts/spot.md)
- [Jug](https://docs.usdd.io/developers/core-contracts/jug.md)
- [Median](https://docs.usdd.io/developers/core-contracts/median.md)
- [OSM](https://docs.usdd.io/developers/core-contracts/osm.md)
- [Proxy contract](https://docs.usdd.io/developers/core-contracts/proxy-contract.md)
- [PSM](https://docs.usdd.io/developers/core-contracts/psm.md)
- [Migrate](https://docs.usdd.io/developers/core-contracts/migrate.md)