matryca-python-standards

matryca-python-standards is a skill for Claude Code, Codex from MarcoPorcellato/matryca-plumber. It costs 46 tokens per session (110 once invoked), scanned A, original, Apache-2.0.

A set of standards for writing and modifying Python 3.12 or newer code and tests. It covers typing, validation, concurrent work, file safety, logging, and verification using the uv tool.

In plain words
What is it for?
Use it whenever you create or modify Python source files or tests. It guides dependency management, type annotations, input checks, concurrency, filesystem operations, logging, and verification.
Why use it?
It gives Python changes consistent rules for correctness, safety, and testing instead of relying on individual preferences.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/marcoporcellato/matryca-plumber/matryca-python-standards
Any agent
npx skills add MarcoPorcellato/matryca-plumber --skill matryca-python-standards
Clone the repo
git clone --depth 1 https://github.com/MarcoPorcellato/matryca-plumber

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 matryca-python-standards

README.md
[![agentmods](https://agentmods.dev/badge/skills/marcoporcellato/matryca-plumber/matryca-python-standards.svg)](https://agentmods.dev/skills/marcoporcellato/matryca-plumber/matryca-python-standards)
Your own site
<a href="https://agentmods.dev/skills/marcoporcellato/matryca-plumber/matryca-python-standards"><img src="https://agentmods.dev/badge/skills/marcoporcellato/matryca-plumber/matryca-python-standards.svg" alt="Measured on agentmods" 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 110 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00046 $0.00110
Opus 5 $0.00023 $0.00055
Sonnet 5 $0.00009 $0.00022
Haiku 4.5 $0.00005 $0.00011

Measured 4d ago against content hash 74a7d02ae386, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

matryca-python-standards 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 4d 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.

.agents/skills/matryca-python-standards/SKILL.md · 8 lines

What it actually says

Matryca Python standards

Read .cursor/rules/02-python-standards.mdc completely before editing Python. Load the clean-architecture skill separately only for boundary, configuration, or structural work.

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. 4d ago First seen · 8 lines · 46 tokens per session scan A 74a7d02ae386

Subscribe to this mod's changes

matryca-python-standards is a skill published in the GitHub repository MarcoPorcellato/matryca-plumber (96 stars, last pushed today), licensed Apache-2.0. It adds 46 tokens to every session and 110 once invoked, about $0.0002 per session on Opus 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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