Joel Posti focused on improving documentation accuracy for the openid/OpenID4VP repository, addressing a key issue in the example client ID scheme. He identified and corrected a mismatch in the Documentation/Examples section, updating the client ID format to x509_san_dns to align with the official specification and real-world usage. Working primarily with text-based documentation, Joel applied his skills in technical writing and specification compliance to ensure clarity for developers integrating OpenID4VP. This targeted fix enhanced onboarding by reducing confusion and support requests, demonstrating careful attention to detail and a commitment to maintaining repository health through precise, non-breaking documentation updates.