python-anti-patterns

python-anti-patterns is a skill for Claude Code, Codex from zebbern/termstack. It costs 46 tokens per session (1,925 once invoked), scanned A, original, no licence file.

A checklist of common Python anti-patterns, which are recurring code structures that often make software harder to maintain or debug.

In plain words
What is it for?
It is for reviewing Python code, checking implementations before completion, and investigating bugs caused by known bad patterns.
Why use it?
It helps catch poor practices before they cause confusing behavior, fragile code, or future maintenance problems.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit It is for reviewing Python code, checking implementations before completion, and investigating bugs caused by known bad patterns.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/zebbern/termstack/python-anti-patterns
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add zebbern/termstack --skill python-anti-patterns
Clone the repo
git clone --depth 1 https://github.com/zebbern/termstack

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for python-anti-patterns

README.md
[![agentmods](https://agentmods.dev/badge/skills/zebbern/termstack/python-anti-patterns/github.svg)](https://agentmods.dev/skills/zebbern/termstack/python-anti-patterns)
Your own site
<a href="https://agentmods.dev/skills/zebbern/termstack/python-anti-patterns"><img src="https://agentmods.dev/badge/skills/zebbern/termstack/python-anti-patterns/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for python-anti-patterns

Your own site · 80×15
<a href="https://agentmods.dev/skills/zebbern/termstack/python-anti-patterns"><img src="https://agentmods.dev/badge/skills/zebbern/termstack/python-anti-patterns.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 46 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,925 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00046 $0.01925
Opus 5.5 $0.00018 $0.00770
Sonnet 5.5 $0.00009 $0.00385
Haiku 4.5 $0.00005 $0.00193

Measured 1mo ago against content hash 5d8074ae2408, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

python-anti-patterns scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

return requests.get(url, timeout=30)
.github/skills/python-anti-patterns/SKILL.md · 350 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago First seen · 350 lines · 46 tokens per session scan A 5d8074ae2408

Subscribe to this mod's changes

python-anti-patterns is a skill published in the GitHub repository zebbern/termstack (4 stars, last pushed 6mo ago), with no licence file. It adds 46 tokens to every session and 1,925 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

Related

Other skills, from other repositories

verify-language

Language-specific verification for Python, TypeScript/JavaScript, and Go. Checks type safety, language idioms, and best practices. Use when asked to "verify language", "check types", or for language-specific checks.

Aurite-ai/agent-verifier · 48 tokens

kieran-python-reviewer

Reviews Python code with an extremely high quality bar for Pythonic patterns, type safety, and maintainability. Use after implementing features, modifying code, or creating new Python modules.

gvkhosla/compound-engineering-pi · 41 tokens

py-reviewer

Review selected Python code for typing, async and exception behavior, resource ownership, data access, framework boundaries, and concrete contract defects in the project's actual runtime.

RaNDoM6913/claude-code-superkit · 35 tokens

coding

A coding guide for writing and running Python programs in a sandbox. It requires scripts to be small and reproducible, with their actual output or errors reported.

bojieli/ai-agent-book · 18 tokens

cuga-contributor-workflows

Run CUGA contributor workflows: Conventional Commits, create pull requests against origin with gh and PR templates, and ruff check/format via uv. Use when the user says commit, create a commit, create PR, pull request, open a PR, ruff check, ruff format, or conventional commits.

cuga-project/cuga-agent · 71 tokens

neo4j-driver-python-skill

Neo4j Python Driver v6 — driver lifecycle, executequery, managed and explicit transactions, async (AsyncGraphDatabase), result handling, data type mapping, error handling, UNWIND batching, connection pool tuning, and causal consistency. Use when writing Python code that connects to Neo4j via GraphDatabase.driver…

neo4j-contrib/neo4j-skills · 186 tokens