Class

Class & OOP reference — inheritance, polymorphism, composition, SOLID principles, design patterns. Use when designing class hierarchies, refactoring object-o...

Security Scan

The skill is an OOP/class reference that runs a packaged local shell script to print documentation; its requested resources and behavior match its description and show no signs of suspicious activity.

Purpose & Capability

Name, description, and provided commands all relate to OOP/class guidance. The only artifact (scripts/script.sh) implements the documented commands, so required resources are proportional to the stated purpose.

Instruction Scope

SKILL.md instructs the agent to run scripts/script.sh with specific subcommands (intro, solid, patterns, etc.). Those commands map to functions in the script that print reference material. The instructions do not request unrelated files, credentials, or external endpoints.

Install Mechanism

No install spec is present (instruction-only skill with an included script). No downloads or package installs are requested; the included script is local and appears to only emit documentation text.

Credentials

The skill declares a single optional configuration variable (CLASS_DIR) for a data directory but does not require any credentials or environment variables. The shipped script (as shown) does not read environment variables or secrets.

Persistence & Privilege

always is false and the skill does not request elevated privileges or modify other skills or system configuration. It is user-invocable and may be invoked autonomously by the agent (default), which is normal for skills; this combination is not concerning here given the script's benign content.

Assessment

This skill is low-risk: it runs a local shell script that prints OOP reference material and asks for no credentials or network access. If you plan to install it, you can: (1) review scripts/script.sh yourself (it's included) to confirm there are no commands that modify files, invoke network calls, or execute external programs; (2) ensure your agent runs with least privilege (don't expose secrets to the agent if not needed). If you see any future updates that add networking, file writes, or new environment requirements, re-evaluate before trusting the update.

Class — Object-Oriented Programming Reference

Quick-reference skill for OOP concepts, class design, SOLID principles, and common design patterns.

When to Use

• Designing class hierarchies and choosing inheritance vs composition
• Applying SOLID principles to refactor code
• Understanding polymorphism, encapsulation, and abstraction
• Choosing the right design pattern for a problem
• Comparing OOP across languages (Java, Python, TypeScript, C++)

Commands

intro

scripts/script.sh intro

OOP fundamentals — classes, objects, the four pillars.

solid

scripts/script.sh solid

SOLID principles — SRP, OCP, LSP, ISP, DIP explained with examples.

inheritance

scripts/script.sh inheritance

Inheritance vs composition — when to use each, diamond problem, mixins.

patterns

scripts/script.sh patterns

Essential design patterns — Factory, Strategy, Observer, Singleton, Builder.

access

scripts/script.sh access

Access modifiers and encapsulation — public, private, protected across languages.

abstract

scripts/script.sh abstract

Abstract classes, interfaces, and protocols — contracts and polymorphism.

pitfalls

scripts/script.sh pitfalls

Common OOP pitfalls — God class, deep hierarchies, over-engineering.

comparison

scripts/script.sh comparison

OOP across languages — Java, Python, TypeScript, Go, Rust.

help

scripts/script.sh help

version

scripts/script.sh version

Configuration

Variable	Description
CLASS_DIR	Data directory (default: ~/.class/)

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