Copilot and MicroVMs: Modernizing Legacy Code in a Faithful Sandbox

I found the All Things Azure post on pairing GitHub Copilot with microVMs via Docker Sandbox a neat solution to a stubborn problem: modernizing legacy code that relies on hardcoded paths and complex build scripts. The key is Docker Sandbox’s “bidirectional workspace sync that preserves the same absolute paths inside the sandbox as on the host,” which lets automated agents like Copilot run refactors and builds in an environment that mirrors the host filesystem. That means fewer surprises from path-dependent scripts and a smoother path for agentic refactoring workflows.

In practice this approach gives you the safety of isolated microVMs while keeping the convenience of working with the exact file layout your code expects. If you’re dealing with fragile build systems or old tooling that assumes specific filesystem locations, this combination—Copilot for agentic changes and Docker Sandbox for faithful isolation—can speed up modernization while reducing breakage.

News: Best of Both Worlds for Agentic Refactoring: GitHub Copilot + MicroVMs via Docker Sandbox
Documentation: Developing inside a container (Dev Containers) — Microsoft Docs


Hi, I’m Oskar!

Cloud architect by day, tech tinkerer by night, and a proud father all the time. Born in 1990 in Poland and now based in Germany, I spend my days diving deep into cloud, Azure, and all things technology. But my passions go beyond the digital world – I love DIY projects, home automation, biking, gardening, and cooking (because good food fuels great ideas).

This little blog is where I share my insights, experiments, and thoughts on cloud tech – because let’s be honest, the internet can always use one more tech enthusiast’s perspective.