Developed the foundational architecture for Decentralized Identifier (DID) management within the affinidi-ssi-dart repository, focusing on extensibility and future scalability. The work involved designing an abstract DID interface with placeholder methods to support both Peer and Web DID implementations, ensuring the system could accommodate evolving requirements. Refactored the SignatureScheme enum to allow integration of new cryptographic algorithms, enhancing flexibility for future features. Updated the CONTRIBUTING.md documentation to establish clear coding standards and streamline onboarding for contributors. The project was implemented using Dart and leveraged expertise in cryptography, DID protocols, and software design, emphasizing maintainable architecture over immediate feature delivery.