ChatGPT Subscription Plugin: Use Your ChatGPT Plus/Pro Quota in DSH

DeepSeek Harness (DSH) offers a plugin called ChatGPT Subscription, designed to let DSH users directly access ChatGPT Plus/Pro models. It uses official OAuth login, supports selecting a model for conversations within DSH, and provides state management, multilingual support, and token synchronization. DSH must be restarted after installation for the plugin to take effect. Note that token writes may affect Codex CLI usage, and uninstalling does not delete authorization data.