The license doesn't actually permit OSS development. Only compilation of near-unmodified third party OSS libraries.
You may not compile OSS software developed by your own organisation.
The OSS software must be unmodified, "except, and only to the extent, minor modifications are necessary so that the Open Source Dependencies can be compiled and built with the software."
https://visualstudio.microsoft.com/license-terms/vs2026-ga-d...