Partly True
A widely shared bug report claiming that "border radius has infected the VS Code editor" does not describe an unintended defect, according to information reviewed from the Visual Studio Code project: the rounded corners are part of a deliberate UI redesign, and the team closed the report as a duplicate. An opt-out setting exists, though only for a limited transition period.
The report characterized the appearance of rounded corners across the VS Code editor as a bug spreading through the interface. The maintainers' response, however, treated the change as intentional: the new look stems from a UI redesign rather than an error, and the issue was closed as a duplicate of existing discussion on the redesign.
Users who prefer the previous square-cornered appearance can disable the new styling through the settings. The catch is timing — the opt-out option is available only during a transition period, after which it is expected to go away. The project's documentation and update pages showcase the redesigned interface, including its rounded editor elements.
The claim that the border radius appeared in the editor is accurate as far as it goes, but labeling it a bug overstates the situation. The change reflects a deliberate redesign with a temporary opt-out, making the claim Partly True.