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fp-refactor

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Comprehensive guide for refactoring imperative TypeScript code to fp-ts functional patterns

When to use

• You are refactoring an existing imperative TypeScript codebase toward fp-ts patterns.
• The task involves converting `try/catch`, null checks, callbacks, DI, or loops into functional equivalents.
• You need migration guidance and tradeoffs, not just isolated fp-ts examples.

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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