# Class > Use this skill when creating a new class or asking how to model a new class in ShapeCrawler. - Skill: `tomevault-io/class` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/class` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/class/raw - Safety review: pending - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: AI & ML - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/class --- # Create Class ## Rule (Key Design Patterns) When creating a new class: - The class must represent a real-world entity or concept (noun). - The constructor must encapsulate the entity’s coordinates: store the properties or underlying object the class uses to refer to that entity. - The class must encapsulate all logic required to produce its result; do not rely on pre-calculated data from callers if it can be derived from dependencies. ## Quick Checks - Class name is a noun, not “-er/-or/-service/-manager”. - Constructor captures the underlying object/properties that identify the entity. - Callers pass minimal inputs; the class derives the rest from its dependencies. --- > Converted and distributed by [TomeVault](https://tomevault.io/claim/shapecrawler) — claim your Tome and manage your conversions.