dsh-authmux: A DSH-Native OAuth Multiplexer

dsh-authmux is a DSH-native OAuth multiplexer plugin maintained by Q-xuan. It is designed to centrally manage logins for subscription-based model providers and reduce operational overhead. By handling OAuth flows at the Core level and leveraging local credential storage and Loopback RPC communication, it provides a compact login plane. It supports automatic detection and migration of legacy credentials, avoids creating duplicate adapters, and enforces strict RPC permission controls and network security. Users only need to enable AuthMux in Settings and log in to use Core-managed credentials and model routing, satisfying compliance and data isolation requirements.