Code Preview.Nvim

code-preview.nvim

A Neovim plugin that shows a **diff preview before your AI coding agent applies any file change** — letting you review exactly what's changing before accepting.

Supports [Claude Code](https://docs.anthropic.com/en/docs/claude-code) and [OpenCode](https://opencode.ai) as backends.

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Demo

Claude Code


OpenCode


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Table of Contents

• Features
• Requirements
• Installation
• Quick Start
  • Claude Code
  • OpenCode
• How it works
• Configuration
• Commands
• Diff Layouts
• Neo-tree Integration
• Testing
• Troubleshooting

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Features

• Diff preview — side-by-side or inline diff opens in Neovim before any file is written
• Multiple layouts — tab, vsplit, or GitHub-style inline diff with syntax highlighting
• Neo-tree integration — file tree indicators show which files are being modified, created, or deleted
• Multi-backend — works with Claude Code CLI and OpenCode
• No Python dependency — file transformations use nvim --headless -l

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Requirements

• Neovim >= 0.9

**For Claude Code backend:**

• Claude Code CLI with hooks support
• jq — for JSON parsing in hook scripts

**For OpenCode backend:**

• OpenCode >= 1.3.0

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Installation

lazy.nvim

{
  "Cannon07/code-preview.nvim",
  config = function()
    require("code-preview").setup()
  end,
}

Manual (path-based)

vim.opt.rtp:prepend("/path/to/code-preview.nvim")
require("code-preview").setup()

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Quick Start

Claude Code

1. Install the plugin and call setup()
2. Open a proje