pypi-security-best-practices

pypi-security-best-practices is a skill for Claude Code, Codex from Aradotso/security-skills. It costs 26 tokens per session (4,944 once invoked), scanned B, original, no licence file.

A guide to safer use of Python packages from PyPI, the public package repository for Python software, with uv and pip package managers.

In plain words
What is it for?
Use it to apply security practices while adding PyPI dependencies to Python projects.
Why use it?
It helps reduce risks when choosing, installing, and managing third-party Python code.

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 apply security practices while adding PyPI dependencies to Python projects.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/aradotso/security-skills/pypi-security-best-practices
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 Aradotso/security-skills --skill pypi-security-best-practices
Clone the repo
git clone --depth 1 https://github.com/Aradotso/security-skills

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 pypi-security-best-practices

README.md
[![agentmods](https://agentmods.dev/badge/skills/aradotso/security-skills/pypi-security-best-practices/github.svg)](https://agentmods.dev/skills/aradotso/security-skills/pypi-security-best-practices)
Your own site
<a href="https://agentmods.dev/skills/aradotso/security-skills/pypi-security-best-practices"><img src="https://agentmods.dev/badge/skills/aradotso/security-skills/pypi-security-best-practices/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 pypi-security-best-practices

Your own site · 80×15
<a href="https://agentmods.dev/skills/aradotso/security-skills/pypi-security-best-practices"><img src="https://agentmods.dev/badge/skills/aradotso/security-skills/pypi-security-best-practices.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 26 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,944 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 3 findings. 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 $0.00026 $0.04944
Opus 5 $0.00013 $0.02472
Sonnet 5 $0.00005 $0.00989
Haiku 4.5 $0.00003 $0.00494

Measured 9d ago against content hash eef131fb27c0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade B, and why

pypi-security-best-practices scanned grade B with 3 findings 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.

Downloads and executes remote codemediumSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

curl -LsSf https://astral.sh/uv/install.sh | sh

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

Unrestricted tool accesslowExcessive agency

A wildcard tool grant or "run any command" leaves no least-privilege boundary at all.

Source distributions can execute arbitrary code via `setup.py`. Enforce binary-only installs:

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

Makes network callslowCapability

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

curl -LsSf https://astral.sh/uv/install.sh | sh
skills/pypi-security-best-practices/SKILL.md · 875 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

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 · 875 lines · 26 tokens per session scan B eef131fb27c0

Subscribe to this mod's changes

pypi-security-best-practices is a skill published in the GitHub repository Aradotso/security-skills (11 stars, last pushed 1mo ago), with no licence file. It adds 26 tokens to every session and 4,944 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it B with 3 findings (downloads and executes remote code, unrestricted tool access, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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