During December 2025, Harry developed a core feature for the DefiLlama/DefiLlama-Adapters repository, enabling calculation of Total Value Locked (TVL) for vaults on both Sui and Bitcoin. He approached the problem by integrating APIs and building backend logic in JavaScript to aggregate and process vault data across multiple chains. This work expanded the platform’s vault coverage, allowing unified analytics and cross-chain asset tracking for users managing assets in different protocols. While the contribution focused on a single feature, it demonstrated depth in data handling and backend development, addressing the need for consolidated TVL metrics in a multi-chain DeFi environment.