Test the React UI you generate with v0 before you ship

v0 generates React and Next.js UI from a prompt or screenshot, and it looks pixel perfect on first render. But v0 ships the interface, not always the behavior behind it. A generated button can have no click handler, a form can be missing its useState and validation, a dashboard can render mock data never wired to a real API, and empty or loading states may never have been built. Desktop layouts overflow on mobile, and hydration or console errors only surface in a real browser. Kane CLI clicks through the live app and catches the gap between a screenshot-perfect UI and one that works.

Whether the generated shadcn and Radix components are interactive, buttons and links do something, forms hold state, validate, and submit, the UI shows real data instead of placeholders, empty and loading states render, the layout holds up across mobile and desktop, and the page is free of hydration and console errors. It verifies each interaction, not just the first paint, and flags the exact control that does nothing.

Yes. v0 builds the UI inside its own browser sandbox, so verification runs on your side. Once the v0 app is deployed or previewed, point the agent at the guide at testmuai.com/kane-cli/agents.md. Tools like Cursor, Claude Code, Codex, and Gemini CLI install Kane CLI, run flows with the --agent flag, read the structured results, and finish wiring the half-built component. Generate with v0, verify with Kane CLI, in the same loop.

Yes. Authenticate with your TestMu AI credentials, pass --headless and --timeout, and gate your pipeline on the exit code: 0 on pass, 1 on fail, 2 on setup or auth errors, 3 on timeout. Point it at your Vercel preview URL and re-run your key interactions on every deploy.

The CLI is free to install and use. Local runs are free; cloud runs on the TestMu AI grid are billed against your TestMu AI plan. Start on the free tier and verify your v0 app end to end without a credit card.