Limit Any Type

What it does

The limit-any-type skill allows you to restrict the possible types that a variable or function parameter can be. This is useful for enforcing stricter type safety and preventing unexpected behavior in TypeScript code. It helps ensure that only specific, allowed types are used in particular contexts, improving code reliability.

When to use it

• Validating Function Arguments: Ensure a function receives input of a limited set of acceptable types (e.g., only numbers or strings).
• Restricting Variable Assignments: Prevent a variable from being assigned values outside of a defined type boundary, such as limiting an age field to positive integers.
• Creating Custom Type Guards: Implement more complex validation logic beyond simple union types.
• Enforcing API Contracts: Guarantee that data received from external APIs conforms to expected type constraints.

Key capabilities

• Type restriction enforcement
• Customizable type boundaries
• Improved type safety
• Prevention of unexpected behavior

Example prompts

• "Restrict the age variable to be a number between 0 and 120."
• "Ensure that the status parameter can only be 'pending', 'approved', or 'rejected'."
• "Validate that the data argument is either an object with specific properties or a string."

Tips & gotchas

This skill requires a basic understanding of TypeScript's type system. Incorrectly defining allowed types can lead to unexpected errors or prevent valid data from being processed.