A real change, end to end

We wanted to show this working on something real and small - the kind of fix that piles up in every backlog and never feels worth a developer's afternoon.

Our billing page was showing totals like €0.2900 - technically correct, visually noisy. We wanted €0.29, rounded sensibly when needed. A tiny change, but a perfect demonstration: clear intent in, shipped code out.

Here's how it went.

Step 1 - We describe the task

No tickets, no specs to write. Just plain language describing what we want.

The prompt we gave the agent:

On the billing page, the order total displays with four decimal places (e.g. "Total €0.2900"). Change it to display with two decimal places instead (e.g. "Total €0.29"). Round to the nearest cent where rounding is needed. Apply this only to the displayed total on the billing page - do not change how amounts are stored or calculated anywhere else. Keep the currency symbol and existing formatting otherwise unchanged.

Step 2 - The team gets to work

Behind the scenes, our agents pick it up as a team. One investigates the codebase and writes a precise spec. Another implements exactly that. A third reviews the work for correctness before anything moves forward - no change reaches you unreviewed.

You watch it happen live.

Step 3 - Before and after

The result, on staging, ready for us to check:

Step 4 - We approve, it ships

The agent doesn't push to production on its own. We review the change on staging, and we press deploy. The human stays in control of what goes live - always.

Why this matters

The small fixes are the ones that never get done. With autonomous coding agents, a task like this goes from idea to shipped in minutes, not someone's afternoon - and you never give up oversight. And with usage costs this low, it's a feature you simply can't afford to overlook. The full implementation you see here - from the first prompt all the way through review and deployment - cost us just €0.30, and under 4 minutes of total time, including the human review process, start to finish:

This is what we're building at Xara: an AI development team for businesses that want to move fast without a fire-and-forget black box. Your codebase, your rules, your final say.

Autonomous Coding Agents are in early access. Want to try it on your own backlog? Get in touch.