Sanctuary Type Identifiers provides a standardized way to represent type information in JavaScript. It defines a common interface, @@type, for identifying the type of a value. This is particularly useful for libraries like Sanctuary, which rely on advanced type checking and dispatch. By adhering to this standard, libraries can interoperate more effectively, enabling robust type safety and predictable behavior across different codebases. This package improves code clarity and simplifies type-related debugging within functional JavaScript development.