LexAI

Bring your own LLM key. LexAI is an open-source writing (and coding) assistant with no LexAI backend, no account, and no subscription. Your text and API key go only to the provider you choose.

Package	What it is	Docs
packages/chrome	Chrome MV3 extension — select text on any page → Fix / Rephrase / Shorten / Expand / Explain / Make Prompt	README · Chrome Web Store
packages/vscode	VS Code / Cursor extension — writing actions + workspace-aware Code Assist	README · Marketplace
packages/cli	CLI Prompt Builder — improve a rough idea into a paste-ready prompt	README
packages/website	Marketing site + docs (features & all packages)	README

Shared provider/prompt core: src/lib.

Quick start

# Prerequisites: Node 22+
git clone https://git.juankibin.space/kibin/LexAI.git
cd LexAI

# Install all packages
npm run install:all

# Chrome extension (dev)
npm run chrome:dev

# VS Code extension
npm run vscode:build
# or install: https://marketplace.visualstudio.com/items?itemName=JuanKibin.lexai-vscode

# CLI Prompt Builder
npm run cli:build
export LEXAI_API_KEY=sk-...          # required; PowerShell: $env:LEXAI_API_KEY="sk-..."
export LEXAI_PROVIDER=openai         # optional: openai | anthropic | groq | openrouter
export LEXAI_MODEL=gpt-4o            # optional
node packages/cli/out/cli.js prompt "add rate limiting to the auth routes"

# Website (features + docs)
npm run website:dev

Repository layout

LexAI/
├── packages/
│   ├── chrome/     # Manifest V3 extension (WXT + React)
│   ├── vscode/     # VS Code / Cursor extension
│   ├── cli/        # lexai prompt CLI
│   └── website/    # Marketing site + docs
├── src/lib/        # Shared providers, actions, types
├── tests/          # Unit + e2e tests (run via chrome package)
├── docs/           # Project operating docs (agents / planning)
└── .gitea/         # CI workflows + issue/PR templates

Supported providers

OpenAI · Anthropic · Groq · OpenRouter

Privacy

• No LexAI servers and no LexAI telemetry
• Chrome: key encrypted in chrome.storage.local
• VS Code: key in Secret Storage
• CLI: key via LEXAI_API_KEY only; optional LEXAI_PROVIDER / LEXAI_MODEL (never put the key in ~/.lexai/config.json)

Contributing

See CONTRIBUTING.md and our Code of Conduct.

License

MIT © LexAI contributors

Links

• Chrome Web Store: https://chromewebstore.google.com/detail/bagpcheidbkfgijnnmolnkgagibbjfnk
• VS Code Marketplace: https://marketplace.visualstudio.com/items?itemName=JuanKibin.lexai-vscode
• Source: https://git.juankibin.space/kibin/LexAI