SolidCraft v0.16.2 from tangency-labs/solidcraft is a release that fixes the model rotation manipulation. It fixes navigation so that, when rotating the model around the selected point, that point stays under the cursor even in perspective view. This change deals with the positional relationship between the reference point during rotation and the cursor. According to the release information, the design file format is the same as in the previous version, so there is no format change. In other words, what is newly mentioned in this version is not the file format but the fix to the navigation manipulation.
SolidCraft is an open-source parametric 3D CAD application written in pure Rust. The repository description states that it can be used on desktop and web, and that it also supports automation through MCP. The project is presented as a tool that provides3D design and automation paths together. The change in this release corresponds to the navigation behavior for looking around the model. It addresses manipulation in perspective view in the case of rotating around the selected point, and the release description explicitly states that it was fixed so that the point stays under the cursor. The fact that the existing design file format is not changed was also made public.
Still, the scope covered by the provided release description extends only to this rotation manipulation fix and the retention of the file format. No performance figures, stability assessment, or indication of changes to other features are given. Therefore there is no basis to interpret v0.16.2 as a broad improvement in CAD features or a performance gain. What can be confirmed is that the navigation behavior when rotating around a selected point in perspective view has been fixed. Any other improvements cannot be judged from the published information alone.