Agent-Skills.md

Agent Skills: SOLID Ruby - Modular Architecture

SOLID principles for Ruby 3.3+ and Rails 8. Files < 100 lines, contracts separated, modular architecture. Modules MANDATORY.

UncategorizedID: fusengine/agents/solid-ruby

Repository

fusengine/agents
fusengineLicense: MIT
7

Install this agent skill to your local

pnpm dlx add-skill https://github.com/fusengine/agents/tree/HEAD/plugins/solid/skills/solid-ruby

Skill Files

Browse the full folder contents for solid-ruby.

Download Skill

Loading file tree…

plugins/solid/skills/solid-ruby/SKILL.md

Skill Metadata

Name
solid-ruby
Description
SOLID principles for Ruby 3.3+ and Rails 8. Files < 100 lines, contracts separated, modular architecture. Modules MANDATORY.

SOLID Ruby - Modular Architecture

Agent Workflow (MANDATORY)

Before ANY implementation, use TeamCreate to spawn 3 agents:

  1. fuse-ai-pilot:explore-codebase - Analyze existing architecture
  2. fuse-ai-pilot:research-expert - Verify Ruby/Rails docs via Context7
  3. fuse-ai-pilot:sniper - Post-implementation validation

DRY - Reuse Before Creating (MANDATORY)

Before writing ANY new code:

  1. Grep the codebase for similar modules, services, or logic
  2. Check shared locations: app/modules/core/services/, app/modules/core/contracts/
  3. If similar code exists -> extend/reuse instead of duplicate
  4. If code will be used by 2+ features -> create it in app/modules/core/

Architecture (Modules MANDATORY)

| Layer | Location | Max Lines | |-------|----------|-----------| | Controllers | app/modules/[feature]/controllers/ | 50 | | Services | app/modules/[feature]/services/ | 100 | | Repositories | app/modules/[feature]/repositories/ | 100 | | Contracts | app/modules/[feature]/contracts/ | 30 | | Models | app/modules/[feature]/models/ | 50 | | Shared | app/modules/core/{services,contracts,concerns}/ | - |

NEVER use flat app/ structure - always app/modules/[feature]/

Critical Rules (MANDATORY)

| Rule | Value | |------|-------| | File limit | 100 lines (split at 90) | | Controllers | < 50 lines, delegate to services | | Contracts | contracts/ directory ONLY (duck typing modules) | | YARD doc | Every public method documented | | Frozen string | # frozen_string_literal: true in every file | | Concerns | Use for shared behavior (like interfaces) |

Reference Guide

Concepts

| Topic | Reference | When to consult | |-------|-----------|-----------------| | SOLID Overview | solid-principles.md | Quick reference | | SRP | single-responsibility.md | Fat classes | | OCP | open-closed.md | Adding strategies | | LSP | liskov-substitution.md | Contracts | | ISP | interface-segregation.md | Fat modules | | DIP | dependency-inversion.md | Injection | | Architecture | architecture-patterns.md | Modular Rails |

Templates

| Template | When to use | |----------|-------------| | module.md | Feature module structure | | service.md | Business logic service | | contract.md | Duck typing contracts | | model.md | Active Record model | | error.md | Custom exceptions | | test.md | RSpec tests |

Forbidden

| Anti-Pattern | Fix | |--------------|-----| | Files > 100 lines | Split at 90 | | Business logic in models | Extract to service | | Fat controllers | Delegate to services | | Flat app/ structure | Use app/modules/[feature]/ | | God classes | Split by responsibility |