Requested rhythmic density, or undefined when the caller named none.
Requested harmonic richness, or undefined when the caller named none.
Requested ornament density, or undefined when the caller named none.
The difficulty ceiling, or undefined for no ceiling.
Tempo in BPM, or undefined when the caller named none.
The resolved algorithm version.
The profile written for a part, if one was named for it.
The figures the caller brought, validated; empty when it brought none.
The position-addressed samplers for a part.
A context with everything resolved: dials validated, tempo and ceiling settled, and a positional source ready for each part.