comparison
Lacy Shell vs Cursor
A shell plugin for your terminal vs an AI-native code editor.
The core difference
Cursor is a full code editor (VS Code fork) with AI built into every surface — autocomplete, chat, inline edits, multi-file changes. Lacy is a shell plugin that detects natural language and routes it to an AI agent. Cursor lives in your editor. Lacy lives in your terminal.
| Lacy Shell | Cursor | |
|---|---|---|
| Type | ZSH/Bash plugin | Code editor (VS Code fork) |
| Where it runs | Your terminal | Desktop app (Electron) |
| AI scope | Shell input routing | Code editing, generation, chat, autocomplete |
| Invocation | Just type in your shell | Cmd+K, Cmd+L, Tab, or inline |
| AI backend | Any CLI (Claude, Gemini, OpenCode, etc.) | Cursor models, Claude, GPT (via Cursor) |
| API key required | No (uses your installed CLI tool) | No (bundled with subscription) |
| Terminal integration | Native — it is your terminal | Built-in terminal panel |
| Real-time indicator | Yes — green/magenta as you type | No (terminal is standard) |
| Price | Free, MIT licensed | Free tier + $20/mo Pro |
| Open source | Yes | No (proprietary) |
| Platform | macOS, Linux, WSL | macOS, Linux, Windows |
Different layers of the stack
Cursor is an editor-first experience. It shines when you’re writing code — autocomplete, multi-file context, inline diffs, and chat that understands your project.
Lacy is a terminal-first experience. It shines when you’re in your shell — running builds, checking logs, managing servers, and asking quick questions without leaving the command line.
Cursor’s terminal panel is a standard terminal. It doesn’t do natural language detection in the shell. If you type “what port is this running on” in Cursor’s terminal, it tries to execute it. With Lacy, it routes to your AI agent.
When to use Lacy
- You live in the terminal and want AI there, not just in your editor
- You use Vim, Neovim, Emacs, or any non-Cursor editor
- You want to pick your own AI backend (Claude Code, Gemini CLI, etc.)
- You want automatic NL routing without hotkeys or prefixes
- You want a free, open-source, zero-account solution
When to use Cursor
- You want AI deeply embedded in your code editing workflow
- You want autocomplete, inline edits, and multi-file AI changes
- You prefer a GUI editor with project-wide AI context
- You want everything bundled — no CLI tools to configure
Can you use both?
Yes, and many developers do. Use Cursor for code editing with its powerful AI features. Use Lacy in your standalone terminal (or even in Cursor’s built-in terminal) for shell workflows, DevOps tasks, and quick questions. They cover different surfaces with no overlap.
The bottom line
Cursor is one of the best AI-powered code editors available. It fundamentally changes how you write code in an IDE.
Lacy doesn’t try to be an editor. It makes your shell AI-aware — the place where you run commands, manage infrastructure, and interact with your system. If Cursor is AI for your code, Lacy is AI for your terminal. Most developers spend time in both places.
Further reading
- Why I didn’t use AI to classify AI input — how Lacy decides whether your input is a shell command or natural language, without ML.