Codex OAuth model connector
DeepSeek Harness provider for GPT models using managed ChatGPT OAuth through Codex app-server.
Project overview
Use GPT models from your ChatGPT account as the main model in DeepSeek Harness. Harness keeps its own agent loop and runs its own tools. This package connects its LLM interface to the official local Codex app-server, which handles ChatGPT login, credential storage, token refresh, and model access.
The installer registers the package with the web and headless profiles, plus any custom profiles that already exist. It also replaces the old deepseek-harness-openai-oauth and dsh-llm-codex-app-server packages if found.
Open Settings > OpenAI OAuth, select Sign in with ChatGPT, and finish authorization in the OpenAI page. The GPT models available to your account will then appear in the normal Harness model picker.