Modern Python Substrate

Q: What is a Claude Code skill and how does the Modern Python Substrate skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Modern Python Substrate is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Engineering · Sub-category: mobile · Last updated: 2026-05-21

Modern Python toolchain substrate. uv for installs and venvs, ruff for lint and format, ty for typecheck, pytest for tests, hypothesis for property-based tests, src/ layout, pyproject.toml as single source of truth, pre-commit hooks. Plus LLM-stack patterns when the codebase calls anthropic, openai, tiktoken, or similar SDKs (prompt caching, retries, streaming, token counting). Use when the user says /python-setup, "set up Python project", "modern Python toolchain", "switch from poetry to uv", "ruff config", "ty migration from mypy", "configure pytest", or starts a new Python codebase. Covers Python 3.11+ idioms.

Security AStatic scan found no risk patternsHow grading works ›

What this skill does

Modern Python Substrate is a community-contributed Claude Code skill in the mobile sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/modern-python-substrate/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when the user says /python-setup, "set up Python project", "modern Python toolchain", "switch from poetry to uv", "ruff config", "ty migration from mypy", "configure pytest", or starts a new Python codebase. Covers Python 3.

Who uses this skill

The Modern Python Substrate Claude Code skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 163,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/modern-python-substrate
curl -L https://claudskills.com/skills/modern-python-substrate/SKILL.md \
  -o ~/.claude/skills/modern-python-substrate/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/modern-python-substrate/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/modern-python-substrate/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\modern-python-substrate\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Modern Python Substrate Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/modern-python-substrate/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Modern Python Substrate skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Modern Python Substrate skill?

Use Modern Python Substrate when your Claude Code task falls under the Engineering category — specifically in the mobile area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Modern Python Substrate" or describe the task and let Claude pick). Browse related skills at /category/engineering/.

What is a Claude Code skill and how does the Modern Python Substrate skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Modern Python Substrate is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/adelaidasofia/ai-brain-starter/blob/HEAD/skills/modern-python-substrate/SKILL.md
License: MIT
Author: adelaidasofia
Website: https://adelaidadiazroa.substack.com/p/how-i-built-a-second-brain-that-actually

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

adelaidasofia. (2026). Modern Python Substrate [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/modern-python-substrate/

BibTeX

@misc{modern-python-substrate-2026,
  author    = {adelaidasofia},
  title     = {Modern Python Substrate [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/modern-python-substrate/}
}

Embed this skill

Promote, attribute, or link this skill from your own README, blog post, or documentation. All three snippets are free to use — no sign-up, no API key. More distribution surfaces →

Badge

[![ClaudSkills](https://claudskills.com/badge/modern-python-substrate.svg)](https://claudskills.com/skills/modern-python-substrate/?utm_source=badge&utm_medium=readme&utm_campaign=skill_badge)

Security scan

Grade A · scanned 2026-07-28 — free static scan against the OWASP Agentic Skills Top 10.

The scan flagged 1 of 10 categories (supply-chain), including a high-severity pattern. Patterns shown inside code fences are weighted as examples rather than instructions — read the grading methodology for what this does and does not guarantee.

✓ Prompt injection
✓ Data exfiltration
⚠ Supply chain
✓ Reverse shell
✓ Credentials
✓ Execution
✓ Filesystem
✓ Persistence
✓ Obfuscation
✓ Network

Show this grade on your repo (click to copy):

[![Security: A](https://img.shields.io/badge/Security-A-2e7d32)](https://claudskills.com/skills/modern-python-substrate/#security)

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Part of ClaudSkills — the open registry for Claude Skills & Claude Code Skills. · What's New · Install guide · About · llms.txt

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