Can it handle asynchronous code?

Yes, it specifically includes patterns for converting async/await and Promise-based code into Result.tryPromise and generator-based workflows.

Should I migrate my entire codebase at once?

No, the skill recommends a boundary-first strategy, starting with I/O points like APIs and databases, then propagating Result types inward to ensure a stable transition.

Does it create custom error classes?

It helps define and implement TaggedError classes, which provide better context and type-safety compared to standard JavaScript Error objects.

What does the better-result migration skill do?

It automates the migration of imperative error handling like try/catch and Promise rejections into typed Result patterns using the better-result library.

Better-Result Migration

Name: Better-Result Migration
Author: dmmulroy

bydmmulroy

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824

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API Development

Migrates legacy try/catch and Promise-based error handling to typed Result patterns using the better-result library.

The better-result migration skill streamlines the transition from imperative error handling to railway-oriented programming in TypeScript codebases. It automates the conversion of standard try/catch blocks, null checks, and async rejections into robust Result types, while helping developers define clear TaggedError categories for domain-specific logic. By leveraging generator-based composition and structured migration strategies, this skill ensures more predictable control flow and improved type safety across I/O boundaries and internal business logic.

Key Features

01Refactors nested error-checking logic into clean generator-based compositions

02Automates return type signature updates to propagate Result types through the call stack

03Converts imperative try/catch blocks into structured Result.try patterns

04Maps arbitrary thrown exceptions to domain-specific TaggedError classes

05824 GitHub stars

06Transforms Promise-based rejections into typed Result.tryPromise results

Use Cases

01Modernizing legacy TypeScript modules with functional error handling patterns

02Replacing brittle null-checking logic with expressive Result-based workflows

03Enhancing API and database I/O reliability by wrapping boundaries in typed errors

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add dmmulroy/better-result adopt

For use in Claude.ai and ChatGPT

Download Skill