Fp Ts Errors

What it does

This skill enables AI agents to handle error management within the fp-ts (functional programming TypeScript) ecosystem, ensuring robust type safety when processing asynchronous operations and data transformations. It allows agents to gracefully manage failures in functional pipelines without breaking application state or losing type information.

When to use it

• Building fault-tolerant data processing pipelines where input validation might fail.
• Handling asynchronous effects (like HTTP requests or database calls) that return Either or Task types.
• Creating utility functions that need to propagate errors through a chain of pure functional transformations.
• Debugging complex type inference issues related to error handling in TypeScript projects.

Key capabilities

• Integrates with the fp-ts library's standard error types (Left, Right, Either).
• Provides type-safe mechanisms for mapping over potential failure states.
• Supports chaining operations that may fail without using try-catch blocks.
• Maintains immutability by avoiding side effects during error propagation.

Example prompts

• "Create a function that validates user input and returns an Either type containing the result or specific validation errors."
• "Write a utility to safely chain three asynchronous API calls, returning a combined error if any step fails."
• "Refactor this imperative code block to use fp-ts patterns for handling potential null values and network timeouts."

Tips & gotchas

Ensure your project has fp-ts installed as a dependency before using this skill, as it relies on specific type definitions. Be mindful that while this approach eliminates runtime exceptions, you must explicitly handle both success and failure cases in every branch of your code logic.