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Go Functional Options

Checked
cxuu·vlatest·backend·Apache-2.0

Generates functional option sets from prompts, aiding in code design exploration and problem decomposition.

Repository

Install on your platform

Showing Claude Code. One command installs this skill into any of the agents below.

  1. 1

    Run this in your project

    terminal
    $ npx skills add cxuu/golang-skills --skill go-functional-options -a claude-code

  2. Uses the open-source skills CLI and needs Node.js. Add -g to install it for your user instead of this project.

What we know about this skill

Publisher

cxuu

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Live repository

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Automated safety checks

scanned

This skill passed all 6 checks. We read its files at one commit and looked for the things that make a skill dangerous to run — not for whether it works.

  • Declares what it does: passed

    SKILL.md parses and declares a name and a description.

    SKILL.md exists, its frontmatter parses, and it declares a name and a description.

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    Scanned cxuu/golang-skills at 91f0c2eef5.

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Commit
91f0c2eef5
Manifest
skills/go-functional-options/SKILL.md
Scanned
2 files, 324 lines
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About this skill

The go-functional-options skill enables Go developers to implement functional options patterns, allowing flexible and readable object configuration through composable option functions. It streamlines complex initialization logic by separating default values from optional overrides without relying on verbose builder methods or struct tags.

When to use it

  • You need to configure structs with many optional fields where defaults should apply unless explicitly overridden.
  • Your codebase requires a clean API surface that avoids deeply nested method chains typical of traditional builders.
  • You want to ensure type safety while maintaining the ability to combine multiple configuration options dynamically at runtime.
  • You are refactoring legacy Go code that uses flag-based initialization or scattered conditional logic for object setup.

Key capabilities

  • Provides a reusable pattern for defining optional configuration parameters as standalone functions.
  • Enables chaining of option functions to build complex configurations from simple defaults.
  • Supports type-safe merging of options without introducing runtime panics from missing fields.
  • Facilitates unit testing by allowing isolated injection of specific configuration subsets.

Example prompts

  • "Generate a Go struct with functional options for database connection settings including timeout, retry count, and SSL mode."
  • "Refactor this builder pattern into functional options to reduce code duplication in my user service initialization."
  • "Show me how to combine default options with custom overrides using the go-functional-options pattern for API client configuration."

Tips & gotchas

Ensure your team is familiar with Go's function value syntax, as functional options rely on passing functions rather than direct arguments. Avoid overusing this pattern for simple structs with only a few fields, as it may introduce unnecessary boilerplate compared to standard constructors.