dsh-openai-oauth: Logging into ChatGPT and Utilizing Codex Models within DeepSeek Harness

dsh-openai-oauth is a community plugin maintained by AdonisSheldon (version 0.1.0, MIT license) that enables users to interact with available Codex models through DeepSeek Harness without using an OpenAI API key or the Codex CLI. The plugin connects to ChatGPT accounts via browser-based login (PKCE/Device Code) or a headless login command, provides automatic token refresh, and integrates Codex models into the DSH standard model selector. Credentials are stored locally in the Harness home directory. The plugin requires DeepSeek Harness 0.1.0-rc.8, Node.js ^22.19.0 or >=24 to run.