Lena enhanced the openid/OpenID4VCI repository by improving credential issuance flexibility through updates to Credential Issuer Metadata. She clarified the optional use of the 'scope' parameter and introduced a fallback to 'authorization_details' for requesting credentials when supported by Authorization Server metadata. This approach, documented in Markdown, addressed ambiguity in credential requests and improved interoperability across diverse OpenID Connect implementations. Lena’s work focused on documentation and protocol clarity rather than bug fixes, aiming to reduce issuance errors and support broader client adoption. The depth of her contribution lay in refining workflow details to ensure robust, enterprise-ready credential issuance processes.