OpenCode CodeIndex Plugin

OpenCode plugin that indexes directories with root file contents. Provides a tool to generate directory tree structures with root file contents for AI context.

Features

• 📁 Generate directory tree structures with root file contents
• 🔍 Intelligently handle binary files and respect .gitignore patterns
• 📦 Configurable max file size for content inclusion
• 🛠️ Exposes tree_indexer tool for OpenCode

Installation

From npm

Add to your OpenCode configuration file (opencode.json):

{
  "$schema": "https://opencode.ai/config.json",
  "plugin": ["opencode-codeindex"]
}

OpenCode will automatically install the plugin using Bun at startup.

From local files

Place the plugin file in your OpenCode plugins directory:

• .opencode/plugins/ - Project-level plugins
• ~/.config/opencode/plugins/ - Global plugins

Usage

Once installed, the plugin exposes a tree_indexer tool that can be used in your OpenCode sessions:

// The tree_indexer tool is automatically available
await ctx.tools.tree_indexer({
  path: './src',
  maxFileSize: 50000,
});

Available Commands

The plugin also provides custom commands defined in Markdown frontmatter. Create .md files in src/commands/:

---
description: Analyze code structure
agent: architect
---

Analyze the following directory structure and provide insights...

{{ tree_indexer path="./src" }}

Programmatic API

You can also use this package programmatically in your own projects:

import { indexDirectory } from 'opencode-codeindex';

// Index current directory
const output = await indexDirectory();

// Index specific path with max file size
const output = await indexDirectory({
  path: './my-project',
  maxFileSize: 102400, // 100KB
});

console.log(output);

API Reference

indexDirectory(args?: IndexArgs)

Generates a formatted directory tree with root file contents.

Parameters:

• args.path (string, optional): Root path to index (defaults to current directory)
• args.maxFileSize (number, optional): Maximum file size in bytes to include content

Returns: Promise - Formatted tree output

Plugin Structure

This plugin follows the OpenCode plugin specification:

import type { Plugin } from '@opencode-ai/plugin';

export const CodeIndexPlugin: Plugin = async (ctx) => {
  return {
    tool: {
      tree_indexer: treeIndexerTool,
    },
    async config(config) {
      // Add custom commands
    },
  };
};

Development

# Install dependencies
npm install

# Build
npm run build

# Run tests
npm test

# Lint
npm run lint

# Format
npm run format

# Type check
npm run typecheck

License

MIT © OpenCode

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

Links

• GitHub Repository
• npm Package
• OpenCode Documentation