python-anti-patterns

python-anti-patterns is a skill for Claude Code, Codex from sileo-oss/agentflow-community. It costs 39 tokens per session (1,947 once invoked), scanned A, original, ODbL-1.0.

A checklist of common Python coding mistakes and poor practices. It helps identify patterns that often make code harder to maintain or cause bugs.

In plain words
What is it for?
Use it to review Python code, check implementations before finishing them, and investigate bugs caused by questionable coding practices.
Why use it?
It gives code reviews and debugging a set of known problems to check for before they become larger issues.

Skill for Claude CodeCodex

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

Good fit Use it to review Python code, check implementations before finishing them, and investigate bugs caused by questionable coding practices.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/sileo-oss/agentflow-community/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 sileo-oss/agentflow-community --skill python-anti-patterns
Clone the repo
git clone --depth 1 https://github.com/sileo-oss/agentflow-community

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/sileo-oss/agentflow-community/python-anti-patterns/github.svg)](https://agentmods.dev/skills/sileo-oss/agentflow-community/python-anti-patterns)
Your own site
<a href="https://agentmods.dev/skills/sileo-oss/agentflow-community/python-anti-patterns"><img src="https://agentmods.dev/badge/skills/sileo-oss/agentflow-community/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/sileo-oss/agentflow-community/python-anti-patterns"><img src="https://agentmods.dev/badge/skills/sileo-oss/agentflow-community/python-anti-patterns.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 39 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,947 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 $0.00039 $0.01947
Opus 5 $0.00019 $0.00974
Sonnet 5 $0.00008 $0.00389
Haiku 4.5 $0.00004 $0.00195

Measured 9d ago against content hash fa9c7a62a148, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, 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 9d 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)
collections/e6eeef5f-1c2e-49bc-9f69-9935141faa01/skills/python-anti-patterns/SKILL.md · 352 lines

The source is not reproduced here

Licensed ODbL-1.0

The repository is licensed ODbL-1.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

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. 9d ago First seen · 352 lines · 39 tokens per session scan A fa9c7a62a148

Subscribe to this mod's changes

python-anti-patterns is a skill published in the GitHub repository sileo-oss/agentflow-community (2 stars, last pushed 6mo ago), licensed ODbL-1.0. It adds 39 tokens to every session and 1,947 once invoked, about $0.0002 per session on Opus 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

mcore-linting-and-formatting

Linting and formatting for Megatron-LM. Covers running autoformat.sh, tools (ruff, black, isort, pylint, mypy), and code style rules.

NVIDIA/skills · 44 tokens

splitting-oversized-modules

Split an oversized Python module (a thousand-plus-line logic.py, models.py, api.py, or its test file) into a package of one module per concern, mechanically and provably without changing behavior. Use on a request to split / break up / decompose a god module or move functions out of one, once a human has agreed to…

PostHog/posthog-foss · 197 tokens

splitting-oversized-modules

Split an oversized Python module (a thousand-plus-line logic.py, models.py, api.py, or its test file) into a package of one module per concern, mechanically and provably without changing behavior. Use on a request to split / break up / decompose a god module or move functions out of one, once a human has agreed to…

PostHog/posthog · 197 tokens

plankton-code-quality

Write-time code quality enforcement using Plankton — auto-formatting, linting, and Claude-powered fixes on every file edit via hooks.

loulanyue/awesome-claude-notes · 34 tokens

coding.make_function_private

Identify private / public functions in a file and rename them with an underscore or not.

causify-ai/helpers · 16 tokens

code-review-python

Provides Python-specific code review rules for the dh code-reviewer agent. Activates on pyproject.toml or .py file detection — enforces uv, ruff, ty, pytest, type annotation, error handling, and Python 3.11+ idioms including pathlib, match statements, and modern union syntax.

Jamie-BitFlight/claude_skills · 68 tokens