domains / families / software-engineering / fp-either-ref

fp-either-ref

authentic

Quick reference for Either type. Use when user needs error handling, validation, or operations that can fail with typed errors.

When to use

• You need a quick fp-ts reference for typed synchronous error handling.
• The task involves validation, fallible operations, or converting throwing code to `Either`.
• You want a compact cheat sheet rather than a long tutorial.

When not to use

• Use this skill only when the task clearly matches the scope described above.
• Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
• Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.

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