Enrique Arizon enhanced exception handling within the walt-id/waltid-identity repository by introducing the ability to attach an optional cause to CryptoExceptions in the Crypto library. This feature, implemented in Kotlin, enables richer debugging context and improves traceability across cryptographic operations. By focusing on advanced exception handling and error propagation patterns, Enrique’s work accelerates root-cause analysis and strengthens maintainability for the codebase. The implementation, delivered through two well-documented commits, demonstrates attention to code quality and commit hygiene. Although no bugs were fixed during this period, the depth of the feature reflects strong software development and observability skills.