Carlos R. developed the foundational architecture for Decentralized Identifier (DID) management within the affinidi-ssi-dart repository, focusing on extensibility and future scalability. He designed an abstract DID interface with placeholder methods to support both Peer and Web DID implementations, ensuring the system could accommodate evolving requirements. Using Dart and applying principles of software design and cryptography, Carlos refactored the SignatureScheme enum to allow for new cryptographic algorithms. He also updated the CONTRIBUTING.md to standardize coding practices and streamline onboarding. His work emphasized robust architectural groundwork, prioritizing maintainability and enabling rapid development of future DID-related features without immediate bug fixes.