Minimal frontend with Next JS, TypeScript, Chakra UI & Ethers/Wagmi and smart contract backend with Foundry to call Compound Finance's repayBorrowBehalf function to repay someone else's CDP (or your own on a separate wallet) through a simple frontend UI.
Plans to add The Graph to query Compound for existing CDPs later as well as update for v3. https://thegraph.com/hosted-service/subgraph/graphprotocol/compound-v2