Function assembly_scale_compatibility_basis 

pub fn assembly_scale_compatibility_basis(
    document: &Document,
    plan: &ScalePlan,
    selector: AssemblyScaleSelectorRequest<'_>,
) -> Result<AssemblyScaleCompatibilityBasis, ScaleError>

Project one accepted plan and pair it with selector identity derived from the same document.

Errors

Returns the plan’s validation error, or a plan/document mismatch if a named request does not resolve to exactly the planned root and skin, or if any selected skin joint lacks one normalized name.