Antigravity
Workspace and global plugin package for Google Antigravity.
Open Antigravity repo →Codex
Codex plugin and local MCP configuration for file conversion.
Open Codex repo →Claude Desktop
MCPB source package for Claude Desktop extensions.
Open Claude repo →Install from GitHub
- Open the repository for your AI client above.
- Download the repository or clone it locally.
- Run
npm installin the plugin folder. - Follow the README instructions and restart your AI client.
Antigravity
Copy the repository folder into your workspace at .agents/plugins/marksift, or globally to ~/.gemini/config/plugins/marksift. Then reload Antigravity MCP servers.
Codex
Clone the Codex repository and add it as a local plugin. The included .codex-plugin/plugin.json, skill, and MCP configuration are ready for local installation.
Claude Desktop
Clone the Claude repository, install the dependencies in server, then build or install the generated .mcpb package from Claude Desktop settings.
ChatGPT
ChatGPT does not install local plugins from GitHub directly. For ChatGPT Apps or remote MCP use, the server must be deployed as a public HTTPS MCP endpoint. The Codex repository is still useful for local development and shared MCP code.
Privacy first: MarkSift is designed to read only files you explicitly select and convert them locally. It does not intentionally upload or retain file contents. Always review permissions before installing an integration.