Keel 1.2.1 is the first supported public release. It includes Windows, Linux, macOS, AppImage, Debian, Docker, and source installation paths; hardened public-release checks; and the keelnotes.com installation guide.
See https://keelnotes.com/install/ for guided setup and verification steps.
Note: desktop installers are not code-signed yet, so operating systems may display an unrecognized-publisher warning.