Avoid Wrapper Types

Name: Avoid Wrapper Types
Author: marius-townhouse

Checked

marius-townhouse·vlatest·backend

This skill prevents the generation of wrapper types, streamlining code and improving performance by eliminating unnecessary layers.

Repository

Install on your platform

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

Run this in your project

terminal

$ npx skills add marius-townhouse/effective-typescript-skills --skill avoid-wrapper-types -a claude-code

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

marius-townhouse

Taken from the source listing. We haven't verified who controls this account.

Install target

Live repository

Not pinned. Installing fetches whatever the repository holds at the time you run the command.

No human has reviewed this code. The checks below are a static scan of the files at one commit — nobody has run this skill or judged whether it works. A skill runs with whatever access you give your agent, so read the source before you install it.

Automated safety checks

scanned 30 Sept 2026

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.
No undeclared network calls: passed
Makes no network calls.
Every host the skill dials — from its scripts, its config endpoints or the commands it tells the agent to run — is either well-known package and API infrastructure or declared in its own frontmatter. Links in documentation are not counted.
No obfuscated payloads: passed
No encoded or obfuscated payloads.
No base64, hex or compressed blob is decoded and then executed, and no encoded shell commands.
No credential access: passed
Reads no keys, tokens, keychains or credential files.
Neither the code nor the SKILL.md instructions read SSH keys, cloud credentials, keychains, token stores, browser cookie databases or dotfiles that hold secrets.
No pipe-to-shell installers: passed
No pipe-to-shell or download-and-run installers.
No `curl … | sh` pattern, in the code or in the instructions, that runs code fetched at run time.
Pinned to a commit: passed
Scanned marius-townhouse/effective-typescript-skills at d754db2077.
The exact upstream commit SHA that was scanned is recorded, so the result refers to specific bytes.

Commit: d754db2077
Manifest: skills/avoid-wrapper-types/SKILL.md
Scanned: 1 file, 174 lines

This is a static scan, not a review. It reads the skill's files; it does not run them, and it cannot tell you whether the skill is any good or whether the code does what its description says. A skill runs with whatever access you give your agent.

What each check looks for →

About this skill

What it does

This skill helps you avoid unnecessary wrapper types in TypeScript code. It identifies situations where a type is being wrapped unnecessarily, often obscuring the underlying type and making code harder to read. The skill can suggest refactorings to simplify your type definitions and improve code clarity.

When to use it

When reviewing complex TypeScript codebases to identify potential areas for simplification.
During code reviews to ensure team members are writing clean, concise types.
When encountering confusing or overly verbose type signatures in existing projects.
To proactively prevent the introduction of unnecessary wrapper types during development.

Key capabilities

Identifies instances of redundant type wrapping.
Suggests refactorings to remove wrappers and simplify types.
Improves code readability by reducing type complexity.

Example prompts

"Analyze this TypeScript code for unnecessary wrapper types: [code snippet]"
"Can you suggest a simpler type definition for MyType = WrappedType<SomeType>?"
"Review this function's signature and identify any potential type wrapping issues: function myFunction(arg: SomeType)"

Tips & gotchas

This skill requires a basic understanding of TypeScript types and generics to effectively interpret the suggestions. Be sure to carefully evaluate proposed refactorings before applying them, as they may have unintended consequences if not fully understood.