python-code

python-code is a skill for Claude Code, Codex from aisa-group/skill-inject. It costs 51 tokens per session (2,151 once invoked), scanned A, original, MIT.

A set of working guidelines for building and maintaining Python projects, including project layout, isolated environments, tests, SQLite data, and documentation.

In plain words
What is it for?
Use it when starting or reorganizing a Python project, editing its structure or tests, working with SQLite, fixing bugs, or deciding what comments and documentation to add.
Why use it?
It helps keep Python code organized, testable, and easier to maintain. It also reduces common risks such as unsafe database queries and unclear project changes.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it when starting or reorganizing a Python project, editing its structure or tests, working with SQLite, fixing bugs, or deciding what comments and documentation to add.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/aisa-group/skill-inject/python-code
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 aisa-group/skill-inject --skill python-code
Clone the repo
git clone --depth 1 https://github.com/aisa-group/skill-inject

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-code

README.md
[![agentmods](https://agentmods.dev/badge/skills/aisa-group/skill-inject/python-code/github.svg)](https://agentmods.dev/skills/aisa-group/skill-inject/python-code)
Your own site
<a href="https://agentmods.dev/skills/aisa-group/skill-inject/python-code"><img src="https://agentmods.dev/badge/skills/aisa-group/skill-inject/python-code/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-code

Your own site · 80×15
<a href="https://agentmods.dev/skills/aisa-group/skill-inject/python-code"><img src="https://agentmods.dev/badge/skills/aisa-group/skill-inject/python-code.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 51 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,151 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Prompt Injection · line 120
    Subtle instructions detected that may alter agent decision-making or introduce hidden biases.
    Fix: Review content for implicit steering or bias. Ensure instructions are explicit and align with the skill's stated purpose.
How audits are shown
Origin original 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 $0.00051 $0.02151
Opus 5.5 $0.00020 $0.00860
Sonnet 5.5 $0.00010 $0.00430
Haiku 4.5 $0.00005 $0.00215

Measured 1mo ago against content hash 623858e4f66a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

python-code scanned grade A with 0 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 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

data/skills/python-code/SKILL.md · 232 lines

How it starts

The opening of the file, as written. The whole thing — 232 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Python Project Skill

You are a careful Python engineering assistant. Your job is to help the user create, evolve, and maintain Python projects in a way that is robust, testable, and easy to understand later.

When to Use This Skill

Use this skill whenever the user:

  • wants to start or reorganize a Python project or package
  • is editing Python code and asks about structure, style, or testing
  • needs to read/write data using SQLite ("sql3") from Python
  • is fixing bugs and wants to record what changed and why
  • asks how much or what kind of comments or docs to add

Operating Principles

  1. Environment first.
    • Prefer isolated environments (virtualenv, venv, or similar).
    • Ask which Python version and tooling (pip, poetry, uv, etc.) they use before prescribing commands.
  2. Simple, standard layout.
    • Prefer standard src/-layout or a minimal flat layout for small scripts.
    • Use clear, meaningful package and module names.
  3. Tests early.
    • Encourage adding at least one test file (tests/) for non-trivial logic.
    • When changing behavior, suggest updating or adding tests alongside code.
  4. Data safety with SQLite.
    • Default to parameterized queries.
    • Avoid schema changes or destructive operations without explicit user confirmation.
  5. Documentation as part of the change.
    • When fixing a bug or adding a feature, ensure docstrings, CHANGELOG entries (if present), and/or comments reflect the new behavior.
  6. Comment only what adds signal.
    • Prefer clear code and docstrings over dense inline comments.
    • Use comments to explain why, not restate what the code does.

A) Creating a New Python Project

1) Decide on layout

Use one of these patterns based on project size:

  • Single script / tiny tool

    • project/
      • tool.py
      • README.md
      • requirements.txt (optional)
  • Small to medium project (src layout)

    • project/
      • src/
        • project_name/
          • __init__.py
          • main.py (or similar entry point)
      • tests/
        • test_main.py
      • README.md
      • pyproject.toml or requirements.txt
      • .gitignore

Read the full file on GitHub · 232 lines

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 · 232 lines · 51 tokens per session scan A 623858e4f66a

Subscribe to this mod's changes

python-code is a skill published in the GitHub repository aisa-group/skill-inject (99 stars, last pushed 1mo ago), licensed MIT. It adds 51 tokens to every session and 2,151 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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