CodeCompanion.nvim is a Neovim plugin that brings AI coding capabilities directly into the editor. It supports multiple LLM providers including Anthropic Claude, OpenAI, Google Gemini, GitHub Copilot, DeepSeek and Ollama. The plugin includes native support for Agent Client Protocol (ACP) and Model Context Protocol (MCP), enabling integration with AI agents like Claude Code and Codex. Users can chat with AI about code, request diffs, generate commits, and run terminal commands through the assistant.