DeepSeek Harness Plugin: Integrating OpenAI Codex (ChatGPT Plus/Pro OAuth)

`ddll8023/dsh-codex` is a DeepSeek Harness (DSH) plugin designed to connect to OpenAI Codex models via OAuth without requiring a DeepSeek Key. It supports browser and headless login, with features such as native web search, Fast mode switching, and automatic credential refresh. Users can manage login, usage, and session modes through CLI commands, securely storing credentials in DSH's own service.