Module variant 

Explicit variant registration via inventory.

Structs

VariantEntry

A registered problem variant entry.

Functions

find_variant_by_alias

Find a variant entry by a variant-level alias (case-insensitive).

find_variant_entry

Find a variant entry by exact problem name and exact variant map.

validate_aliases_inner

Core validation logic, separated for testability with mock data.

validate_variant_aliases

Validate all variant-level aliases registered in inventory.

variant_label