Multi-unit tool.
Search "kg to lbs" and you land on a page that is ninety percent ads, a cookie wall, and a newsletter popup, all wrapped around one input box doing arithmetic a calculator could do. The conversion math has been settled for centuries. The only modern thing about these sites is how aggressively they monetize your attention for it. This blueprint gives you the box without the circus. You describe the converter, the agent builds it, and it loads instantly because there is nothing to load but the tool.
A multi-purpose converter covering length, weight, and temperature, with a clean interface that converts instantly as you type, no submit button and no page reload. The unit definitions are plain data, so the ratios are easy to read and easy to trust, and temperature is handled with real formulas rather than a lookup table that breaks on edge cases.
You watch it come together in the task workspace: the agent scaffolds the project, writes the conversion logic, starts the dev server, and checks the numbers land correctly before handing you a live preview. The code lands on a branch in your repository with a pull request ready.
The first version is a base you steer with plain follow-up messages:
Each follow-up wakes the same repository and the agent continues on its own code.
Do I need to know how to code? No. You describe the converter; the agent writes it, verifies the math, and ships the code to your repository.
Does it need an internet connection? No. The conversions run in the browser, so it works offline once loaded, with no tracker phoning home.
Can I add my own units? Yes. Ask, and the agent extends the data with whatever niche units you work in.