---
title: "Python Design Patterns - Air Market"
description: "A class or function in your Python has grown until nobody wants to touch it, or you are about to add an abstraction and are not sure you should. This helps you decide how responsibilities should be s…"
canonical: "https://airmarket.ai/app/python-design-patterns"
---

[Air Market](/) / [Developer Tools](/category/devtools) / Python Design Patterns

Skill by [Seth Hobson](/@wshobson)

# Python Design Patterns

Decide where responsibilities go before the class grows teeth

## What this does

A class or function in your Python has grown until nobody wants to touch it, or you are about to add an abstraction and are not sure you should. This helps you decide how responsibilities should be split. Reach for it when code is getting hard to test because everything is entangled.

### Top 3 things it does for you

- Break up a God class or an overgrown function
- Decide whether a new abstraction is worth it
- Choose composition over inheritance, or not

## Information

**Python Design Patterns at a glance**

|  |  |
| --- | --- |
| Kind | Skill |
| Publisher | [Seth Hobson](/@wshobson) |
| Category | [Developer Tools](/category/devtools) |
| Works with | Agent Skills - an open standard supported by 40+ agents |
| Size | 15 KB |
| Licence | MIT |
| Repository | [wshobson/agents](https://github.com/wshobson/agents/tree/d6837ae274c2cd817acad3fb98f193a4390a4c3e/plugins/python-development/skills/python-design-patterns) |
| GitHub stars | 39,077 (as of Nov 2026) |
| Installs | 23,736, counted by skills.sh (Nov 2026) |

## Security report

**Verified.** AIR scanned this exact version of Python Design Patterns and recorded 0 findings and 2 flagged items. AIR's verdict: **safe**.

**What Python Design Patterns's check was run against**

|  |  |
| --- | --- |
| Commit | d6837ae274c2cd817acad3fb98f193a4390a4c3e |
| Content hash | ddfb93f5c8198c870f140a3cd99213f6510fc5466311667f12a05ba15e6d15f5 |
| Files read | [Browse the files at this exact commit](https://github.com/wshobson/agents/blob/d6837ae274c2cd817acad3fb98f193a4390a4c3e/plugins/python-development/skills/python-design-patterns/SKILL.md) |

A scan is named by the exact content it read, not by a version number. A different version is a different artifact, and nothing here applies to a version AIR has not scanned.

[Read the full security report for Python Design Patterns](/security/python-design-patterns)

## About Python Design Patterns

This is about structural decisions in Python: KISS, separation of concerns, single responsibility, and preferring composition to inheritance.

Reach for it when designing a new service or component and deciding how to layer responsibilities, when refactoring a God class or a function that grew too big, or when weighing a new abstraction against living with some duplication.

It also covers review-time judgement - spotting tight coupling or internal types leaking out - the inheritance-versus-composition call on a new hierarchy, and codebases that have become hard to test because I/O and business logic are entangled.

## What's inside

- SKILL.md - instructions
- references/details.md - reference

## Questions

### Is Python Design Patterns safe to install?

AIR scanned this exact version of Python Design Patterns and recorded 0 findings and 2 flagged items. AIR's verdict: safe. The verdict is named by the content that was read, at commit d6837ae274c2, so it cannot drift onto a version nobody scanned. The full report is at https://airmarket.ai/security/python-design-patterns.

### How do I install Python Design Patterns?

Open https://airmarket.ai/app/python-design-patterns on Air Market and use the install action: Air Market hands Claude a prompt naming this exact skill, and Claude sets it up. Source, pinned to the exact commit this listing describes: https://github.com/wshobson/agents/tree/d6837ae274c2cd817acad3fb98f193a4390a4c3e/plugins/python-development/skills/python-design-patterns. Install from that link, not the branch.

## Related on Air Market

- [More Developer Tools listings](/category/devtools)
- [Everything by Seth Hobson](/@wshobson)

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Canonical URL: <https://airmarket.ai/app/python-design-patterns>