Your AI pair programmer, running locally. Ship code faster with surgical AI edits that actually work.

KeyStone Lite is a desktop code editor with built-in AI that understands your codebase and makes precise, line-level changes. No more copy-pasting from ChatGPT. No more broken suggestions. Just ask, review, apply.

• Actually understands your files - Your active file is automatically included with line numbers, so the AI knows exactly where to make changes
• Surgical precision - No more "here's the whole file rewritten." KeyStone uses INSERT, REPLACE, DELETE operations on specific lines
• 11+ LLM providers - Groq, OpenAI, Anthropic, Gemini, Mistral, Cohere, DeepSeek, or your own local Ollama instance
• Two modes for two mindsets - Debug mode lets you review before applying. Keystone mode auto-applies for rapid iteration

• Ship MVPs faster - Stop context-switching between AI chat and your editor. It's all in one place
• Bring your own keys - Use your existing API keys. Pay for what you use, no per-seat SaaS pricing
• Works offline - Connect to local LLMs (Ollama, LMStudio, vLLM) for air-gapped environments
• White-label ready - Fork it, brand it, ship it as your own dev tool (see licensing)

1. Get an API key from aiassist.net or use your own provider keys
2. Download the latest release for your platform
3. Open a project folder and start coding with AI

# Or run from source
cd keystone-lite
npm install
npm run dev      # Start Vite dev server
npm start        # Launch Electron (in another terminal)

Click "Open Folder" or drag a directory. Your file tree appears in the sidebar.

Open a file - it's automatically added to the AI's context with line numbers. Ask questions or request changes.

The AI responds with precise edit blocks:

<<<EDIT app.tsx>>>
<<<REPLACE lines 15-20>>>
const handleSubmit = async (data: FormData) => {
  const response = await api.post('/submit', data);
  return response.json();
};
<<<END>>>

In Debug mode, click "Apply All" to apply. In Keystone mode, changes apply instantly.

npm run dist        # Build for current platform
npm run dist:all    # Build for Mac, Windows, Linux

Installers are output to the dist/ folder.

keystone-lite/
├── src/
│   ├── main/              # Electron main process
│   │   ├── index.ts       # IPC handlers, file ops
│   │   └── preload.ts     # Context bridge
│   └── renderer/          # React frontend
│       ├── components/    # ChatPanel, EditorTabs, ModelSelector
│       ├── lib/           # surgical-edit.ts parser
│       └── pages/         # MainLayout
├── templates/             # Project starters
└── assets/               # Icons and images

• API keys encrypted at rest via electron-store
• All file operations sandboxed to opened project
• No telemetry, no tracking, no phone-home
• Context isolation enabled in Electron

Business Source License 1.1 - See LICENSE_BUSL

• Free for personal use, development, and evaluation
• Production use requires AiAS API keys or commercial license
• Forks for distribution require written authorization from Interchained LLC
• Converts to MIT License on January 1, 2030

For commercial licensing: licensing@interchained.com

• API Keys & Platform: aiassist.net
• Issues & PRs: GitHub
• Enterprise Licensing: licensing@interchained.com

Built by Interchained LLC - Powering the next generation of AI-assisted development.