Agent-Skills.md

Agent Skills: SOLID Python - Modular Architecture

SOLID principles for Python 3.12+. Files < 100 lines, interfaces separated, modular architecture. Modules MANDATORY.

UncategorizedID: fusengine/agents/solid-python

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fusengine/agents
fusengineLicense: MIT
7

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

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

Skill Metadata

Name
solid-python
Description
SOLID principles for Python 3.12+. Files < 100 lines, interfaces separated, modular architecture. Modules MANDATORY.

SOLID Python - 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 Python 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 interfaces, services, or logic
  2. Check shared locations: core/services/, core/interfaces/
  3. If similar code exists -> extend/reuse instead of duplicate
  4. If code will be used by 2+ features -> create it in core/

Architecture (Modules MANDATORY)

| Layer | Location | Max Lines | |-------|----------|-----------| | Routes | modules/[feature]/routes/ | 50 | | Services | modules/[feature]/services/ | 100 | | Repositories | modules/[feature]/repositories/ | 100 | | Interfaces | modules/[feature]/interfaces/ | 30 | | Models | modules/[feature]/models/ | 50 | | Shared | core/{services,interfaces,models}/ | - |

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

Critical Rules (MANDATORY)

| Rule | Value | |------|-------| | File limit | 100 lines (split at 90) | | Routes | < 50 lines, delegate to services | | Interfaces | interfaces/ directory ONLY | | Docstrings | Every public function documented | | Type hints | MANDATORY on all signatures | | Protocols | Use typing.Protocol for interfaces | | Small interfaces | 1-3 methods max |

Reference Guide

| Topic | Reference | When to consult | |-------|-----------|-----------------| | SOLID Principles | principles.md | Quick reference for all 5 principles | | Patterns & Structure | patterns.md | Directory layout, testing, typing |

Forbidden

| Anti-Pattern | Fix | |--------------|-----| | Files > 100 lines | Split at 90 | | Interfaces in impl files | Move to interfaces/ directory | | Fat interfaces (4+ methods) | Split into small Protocols | | Flat src/ structure | Use modules/[feature]/ | | Concrete dependencies | Use Protocol + dependency injection | | Missing type hints | Add type annotations to all signatures |