How it looks like
You prompt. Claude writes the code. Your app is live. Automatically.
Your ideas...
... Created
Your Harness Companion
Imagine you're building a web app. You ask Claude Code to add a dark mode feature. Claude writes the code and needs somewhere to put it. Without automation, you'd have to:
- 1Manually create a branch for the feature
- 2Manually review and merge the AI's code
- 3Manually set up a test environment to preview
- 4Manually create a pull request when ready
- 5Manually tear down the environment after merging
- 6Manually delete old branches to keep things tidy
How to get started?
Get your companion
Chat with Cuirass below. Tell him what you want to build and he’ll help you create your starter prompt.
Get your companion ↓Follow the wizard
You’ll be guided every step of the way. Creating your repo, tokens and environments. But first, get your companion below.
Get your companion ↓Build apps like you never thought possible.
With your CI/CD pipeline live and your companion by your side, every idea is one prompt away.
Get your companion ↓Get your companion
Describe your idea and we'll get you started. A draft starter prompt will be included so Claude builds your app directly from the first session.
Or skip this and pick a variant manually
Manually pick your starting point
Picking manually is totally fine — your app's scope defines whether you need a deploy target or can work with a leaner companion. Slide to find yours.
Web App
For landing pages, portfolios, dashboards, and apps. Each feature gets its own live URL, database, and file bucket. Use what you need; ignore what you don't.
Builds on Code Only, plus:
A new way to build software
Harness Engineering is an opinionated approach to building software. A single person, or a small team, directs AI agents through structured workflows called the harness. The harness ensures quality at speed, with minimal friction. Instead of writing every line of code by hand, you orchestrate intelligent agents that build, test, and deploy on your behalf.
- 1Speed is limited by how fast people can write code
- 2Scaling means hiring more engineers
- 3Context lives in people’s heads
- 4Quality and speed are always in tension
- Speed is limited by how fast you can review and iterate on ideas
- Scaling means compounding, not linear growth
- Context is encoded in the harness itself
- Quality is built into the workflow, and speed follows naturally
The bottleneck is no longer writing code. It is deciding what to build. Harness Engineering shifts your team from execution to judgment, which is the one thing humans still do better than machines.
Read more about Harness Engineering→Not another AI platform.
Cursor, Replit, Lovable, and Vercel are platforms you use. Harness Companion is infrastructure you own. Here is what that means in practice.
Everyone shares the same staging environment. Test data collides between features. Coordinate manually or hope for the best.
Every feature branch gets its own database, storage bucket, and preview URL. Automatically. Zero coordination.
/feature