Convert imperative TypeScript code into functype functional patterns.
npx skills add https://github.com/jordanburke/functype --skill functype-user
Please help me install this Agent Skill. Skill: functype-user Source: https://github.com/jordanburke/functype/tree/main/.claude/skills/functype-user Command: npx skills add https://github.com/jordanburke/functype --skill functype-user
Traditional imperative or OOP TypeScript can lead to verbose null checks, complex error handling, and mutable state. This Skill helps developers adopt functype's functional patterns to write cleaner, safer, and more predictable code, reducing bugs and improving maintainability.
if (value !== null) checks into a concise Option(value).flatMap(…).orElse() chain, eliminating boilerplate and reducing potential runtime errors.npm install functype
if (value !== null && value !== undefined) { return value.toUpperCase() } return ""
Option(value) .map((v) => v.toUpperCase()) .orElse("")
High-intent search queries and answers about installing and using this skill.
Use functype's Option type to replace null checks. Wrap nullable values with Option(value), then chain methods like .map() and .flatMap() to transform data safely, eliminating nested if statements and reducing null-check boilerplate.
functype provides Either and Try types for functional error handling. Either captures success or failure branches; Try wraps exceptions as values. Both let you chain operations with .flatMap() instead of nesting try-catch blocks, improving readability.
Yes. functype includes List and Set for immutable collection operations. These support functional pipelines with map, filter, and flatMap, letting you transform data without side effects and maintain predictable state.
Install functype via npm, then identify imperative code patterns—null checks, error handling, mutable loops. Replace them incrementally: if-else chains become Option chains, try-catch becomes Either or Try, and loops become List operations with map or flatMap.
Yes. functype's Option, Either, and Try types integrate with async operations and validation pipelines. Chain .flatMap() across async results and validation steps to build composable, error-safe workflows without callback nesting.
functype works best for isolated modules and new code. Refactoring large OOP systems requires gradual adoption to avoid over-engineering simple logic. Not all patterns map cleanly; stateful systems and tight coupling may resist functional conversion.
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