Splitting the discussion from #9770 for adding CSS Shapes 1 to the Reliable Candidate Recommendations section of the CSS Snapshot 2025.

Data to consider:

Current status: CRD (last published: 12 June 2025), ED from 11 June 2025
WPT: passing tests: Chrome: 5337, Edge: 5258, Firefox: 5946, Safari: 5111; interop: 4637 / 6071 (76.4%), 5246 / 6071 (86.4%) for Chrome and Firefox
Current Snapshot section: Fairly Stable
Open issues: on GitHub: 20 (~11 substantial for that spec. level), in spec.: 0

Summary: High interoperability, many open issues.

Note: Due to the amount of open issues, it might also be put to Rough Interoperability, instead, though it probably should be removed from Fairly Stable.

Sebastian