Current status#
C# checks attribute names, constructor arguments, and allowed attribute targets. Roslyn discovery and processing also perform some checks, but processing errors currently surface as exceptions.
Live shader diagnostics, per-backend compatibility warnings, YotsubaTargets, and the previously illustrated YS1003, YS2001, and YS2002 analyzer messages are planned; their implementation was not found in the repository.
The implemented source generator reports YSG0001 when its SPIR-V grammar input is missing. That diagnostic belongs to operation-table generation, not shader validation.