image property
Image is the toolchain image the recipe runs in, a Go bookworm image by default. It is the one field the GitHub lane ignores: there the runner IS the toolchain, and a cluster has to be told what a runner already is.
Please note: This property should have been non-nullable! Since the specification file does not include a default value (using the "default:" property), however, the generated source code must fall back to having a nullable type. Consider adding a "default:" property in the specification file to hide this note.
Implementation
String? image;