feat(cli): add initial CLI implementation with argument parsing and prompt handling

- Created package.json and package-lock.json for CLI package.
- Implemented argument parsing in args.ts to handle various flags and commands.
- Developed main CLI logic in cli.ts to execute commands and handle errors.
- Added configuration loading from a JSON file in config.ts, with environment variable support.
- Implemented prompt resolution and provider interaction in prompt.ts.
- Added usage documentation for the CLI.
- Configured TypeScript settings in tsconfig.json for the CLI package.
- Updated README in vscode package to reflect the new CLI functionality.
- Refactored root tsconfig.json to streamline project structure.

README.md

@@ -1,41 +1,72 @@
-# ⚡ LexAI — AI Writing Assistant
+# LexAI
 
-A Grammarly-like Chrome Extension powered by **your own LLM API key**. No monthly subscription. Full control.
+**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.
 
-## Features (Roadmap)
-- ✅ Grammar & spelling correction
-- ✅ Rephrase / rewrite text
-- ✅ Shorten or expand text
-- 🔜 Tone suggestions
-- 🔜 Autocomplete
-- 🔜 Custom style profiles
+| Package | What it is | Docs |
+| --- | --- | --- |
+| **[packages/chrome](packages/chrome)** | Chrome MV3 extension — select text on any page → Fix / Rephrase / Shorten / Expand / Explain / Make Prompt | [README](packages/chrome/README.md) · [Chrome Web Store](https://chromewebstore.google.com/detail/bagpcheidbkfgijnnmolnkgagibbjfnk) |
+| **[packages/vscode](packages/vscode)** | VS Code / Cursor extension — writing actions + workspace-aware **Code Assist** | [README](packages/vscode/README.md) · [Deploy](packages/vscode/DEPLOY.md) |
+| **[packages/cli](packages/cli)** | CLI **Prompt Builder** — improve a rough idea into a paste-ready prompt | [README](packages/cli/README.md) |
 
-## Supported LLM Providers
-- **OpenAI** (GPT-4o, GPT-4o-mini)
-- **Anthropic** (Claude 3.5 Haiku, Sonnet)
-- **Groq** (free tier — fast!)
-- **OpenRouter** (100+ models)
+Shared provider/prompt core: [`src/lib`](src/lib).
 
-## Tech Stack
-- WXT + React 18 + TypeScript
-- Manifest V3
-- Inline-styled UI (no CSS framework)
-
-## Development
+## Quick start
 
 ```bash
-npm install
-npm run dev      # Dev mode with hot reload
-npm run build    # Production build
-npm run zip      # Package for Chrome Web Store
-npm test         # Run unit tests
+# 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
+# then F5 / Install from VSIX — see packages/vscode/README.md
+
+# CLI Prompt Builder
+npm run cli:build
+export LEXAI_API_KEY=sk-...   # PowerShell: $env:LEXAI_API_KEY="sk-..."
+node packages/cli/out/cli.js prompt "add rate limiting to the auth routes"
 ```
 
-## Load in Chrome
-1. Run `npm run build`
-2. Open Chrome → `chrome://extensions`
-3. Enable **Developer Mode**
-4. Click **Load unpacked** → select `.output/chrome-mv3`
+## Repository layout
 
-## Project Management
-Plane: LEXAI project → https://plane-pro.juankibin.space
+```text
+LexAI/
+├── packages/
+│   ├── chrome/     # Manifest V3 extension (WXT + React)
+│   ├── vscode/     # VS Code / Cursor extension
+│   └── cli/        # lexai prompt CLI
+├── 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` environment variable only
+
+## Contributing
+
+See [CONTRIBUTING.md](CONTRIBUTING.md) and our [Code of Conduct](CODE_OF_CONDUCT.md).
+
+## License
+
+[MIT](LICENSE) © LexAI contributors
+
+## Links
+
+- Chrome Web Store: https://chromewebstore.google.com/detail/bagpcheidbkfgijnnmolnkgagibbjfnk
+- Source: https://git.juankibin.space/kibin/LexAI