Quick start

The shortest complete loop in Contrast: create a project, see it running, change it, hand a feature to an agent, and put it on a live URL.

#1. Open Contrast

Go to contrast.dev. You land in a workspace with a seeded starter project already running, so there is always something live to look at.

Sign in with GitHub or an email magic link to build for real and to use agents. Anything you started anonymously moves to your account when you sign in.

#2. Create a project

Two ways:

• Describe it. Type what you want in the chat. Try: a recipe box app where my family can save and rate dinners. Contrast picks the right template and spins up a fresh project.
• Pick a template. Choose App, Game, or Website from the welcome cards or the Project → New Project menu. See Templates for what each includes.

Either way you land in the Dev space with files, schema, and a dev stack already running.

#3. See it running

The app is live on two surfaces, driven by the same in-browser stack:

• Web, in a browser preview.
• iOS, rendered natively through rnx.

Both follow your edits and your branch. A web-only project hides the native pane.

#4. Make an edit

Open a file in the editor, change something visible, and save. The web preview hot-reloads and the native preview rebuilds the same bundle. You just shipped to both surfaces from one codebase.

#5. Hand a feature to an agent

Describe what you want to Lux in plain language. Lux keeps the conversation focused on your product and hands the goal to the Manager, which plans the work and dispatches agents on isolated branches. Watch the result land in the same previews. See Agents for how to frame goals well.

#6. Deploy it

Open the Deploy pane and press Deploy. Your app goes to a live URL like yourname.contrast.run, and the Production section lets you click through the real deployment. When you are ready for more, add a custom domain or start the App Store path.

#Next

• Essentials, the model behind projects, branches, previews, and data.
• Agents, getting good results from the factory.
• Contrast on your phone, keep building from anywhere.