dsh-antigravity-auth: A DSH plugin for integrating Antigravity capabilities into DeepSeek Harness.

`dsh-antigravity-auth` is an unofficial plugin developed specifically for the DeepSeek Harness (DSH) Web interface, aiming to centrally integrate Antigravity's model routing, search, image, and video understanding capabilities. The plugin utilizes the OAuth 2.0 with PKCE protocol to provide unified access to features such as LLMs (e.g., Gemini, Claude series, and GPT-OSS), Web search, image generation and editing, and MP4 video analysis via shared login states, and also offers a quota visualization dashboard. Its security design ensures that tokens do not enter the browser or logs, with the authorization header being received only on the Host side. The plugin requires DSH 0.1.x and Node.js 22.19.0+ environments.