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AI wrote the bug. You need production data to reproduce it

Oct 19, 2026 By Upsun In Upsun
A pull request lands with a function an AI assistant generated. It reads cleanly, passes the existing tests, and gets merged. Three weeks later it breaks, but only for accounts with a specific billing history. Nobody wrote a test for that condition because nobody was thinking about it when the code went in. Now someone has to debug logic they didn't reason through, against a failure they can't picture without the exact data that triggered it. Debugging someone else's code has always worked this way.
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From bug report to verified fix in a single workflow

Oct 14, 2026 By Upsun In Upsun
Most debugging content shows one feature in isolation. This walkthrough covers the whole path. The bug: a discount code stopped applying for customers on annual billing plans. It passed every existing test, worked for monthly accounts, and failed only for a subset of real annual customers. Nobody had reproduced it outside production. Here's how it went from ticket to verified fix.
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Spin up a full-stack preview environment in seconds, zero config

Oct 13, 2026 By Upsun In Upsun
A pull request goes up. The reviewer wants to see it running, not just read the diff, so someone pings the team: can I get an environment for this? Depending on who's around, that could take an hour. It could take until tomorrow. By the time the environment exists, the reviewer has moved on to something else, and getting their attention back is its own task. What if the preview URL was already sitting in the PR before anyone had to ask?
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Cut your debug time by reproducing production on demand

Oct 12, 2026 By Upsun In Upsun
If a bug only shows up under real production conditions, the fastest path to a fix is removing the guesswork about those conditions, not layering on more debugging tools. This guide walks through what changes when every branch gets its own preview environment, a full clone of production available on demand, and what that actually looks like day to day.
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That 2am incident cost you more than downtime

Oct 7, 2026 By Upsun In Upsun
It's 2:14am. A pager alert wakes an on-call engineer for a checkout failure hitting a slice of customers. By the time they've pulled the right logs, cross-checked the deploy history, and finally gotten the bug to happen again in front of them, the sun's coming up. The incident report will list two hours of downtime. It won't say anything about the day that engineer just lost, or the fact that nobody on your team could have told you in advance how long that reproduction step was going to take.
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Run your first workflow in minutes, no sales call

Oct 6, 2026 By Upsun In Upsun
The regression nobody catches passes a busy review and ships. An off-by-one, a change that reads as sensible and quietly breaks something, gets a nod from a tired reviewer and lands in production, where it erodes trust one small defect at a time. You can have an AI code reviewer running on your own repository in the time it takes to read this page. Get started without having to book a demo or contact sales.
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Get your agents off laptops and onto shared infrastructure

Oct 5, 2026 By Upsun In Upsun
There's a specific, recognizable point where a team's use of AI agents changes shape. Not when they adopt agents; most teams already have. It's when agents stop running on someone's laptop and start running on infrastructure that the whole team can see. This is a real technical shift, not a policy change or a maturity score. Here's specifically what's different on each side of it.
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Watch this AI agent find and fix performance bottlenecks

Sep 30, 2026 By Upsun In Upsun
Anyone can claim an AI agent will fix your performance problems. This demo shows exactly what it looks at and what it hands back. In this Product Highlights conversation, Sylvain Guittard, Senior Director of Product at Upsun who leads the team behind the Upsun console and CLI, runs the Upsun Cloud Performance Agent live on a demo project. His take: "You have a patch that is already available, and a recommendation, so you can see if it fits or not to your context." We get into.
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This AI agent finds your app's bottlenecks and suggests the fix

Sep 30, 2026 By Upsun In Upsun
Most teams collect the profiles and traffic data that explain a slowdown. Almost nobody has time to read it before users notice. In this Product Highlights conversation, Sylvain Guittard, Senior Director of Product at Upsun who leads the team behind the Upsun console and CLI, breaks down the Upsun Cloud Performance Agent, the first background agent running on Upsun Cloud. His take: "We monitor everything, we feed that into an agent, and the agent will be capable of finding what the bottlenecks are in your application. And on top of it, it gives you a patch, or a way to fix it." We get into.
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