Python
ericrisco/rsc-harness
A skill your agent uses when the task is Python itself, in any framework or none: PEP 695 generics, mypy --strict typing, dataclass/Protocol/TypedDict/Enum choices, asyncio.TaskGroup, stdlib idioms…
Modern Python tooling practices for the mycelium project. An agent skill from mycelium-io/mycelium.
Install Modern Python
$ npx skills add mycelium-io/mycelium --skill modern-python -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install mycelium-io/mycelium modern-python --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/mycelium-io/mycelium.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/modern-python .claude/skills/modern-python && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "modern-python" agent skill from https://github.com/mycelium-io/mycelium/tree/main/.claude/skills/modern-python into .claude/skills/modern-python/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "modern-python", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/mycelium-io/mycelium/tree/main/.claude/skills/modern-pythonType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add mycelium-io/mycelium --skill modern-python -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install mycelium-io/mycelium modern-python --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mycelium-io/mycelium.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/modern-python .agents/skills/modern-python && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "modern-python" agent skill from https://github.com/mycelium-io/mycelium/tree/main/.claude/skills/modern-python into .agents/skills/modern-python/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "modern-python", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add mycelium-io/mycelium --skill modern-python -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install mycelium-io/mycelium modern-python --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mycelium-io/mycelium.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/modern-python .cursor/skills/modern-python && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "modern-python" agent skill from https://github.com/mycelium-io/mycelium/tree/main/.claude/skills/modern-python into .cursor/skills/modern-python/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "modern-python", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/mycelium-io/mycelium.git --path .claude/skills/modern-python--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add mycelium-io/mycelium --skill modern-python -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install mycelium-io/mycelium modern-python --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mycelium-io/mycelium.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/modern-python .gemini/skills/modern-python && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "modern-python" agent skill from https://github.com/mycelium-io/mycelium/tree/main/.claude/skills/modern-python into .gemini/skills/modern-python/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "modern-python", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install mycelium-io/mycelium modern-pythonInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add mycelium-io/mycelium --skill modern-python -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/mycelium-io/mycelium.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/modern-python .github/skills/modern-python && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "modern-python" agent skill from https://github.com/mycelium-io/mycelium/tree/main/.claude/skills/modern-python into .github/skills/modern-python/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "modern-python", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add mycelium-io/mycelium --skill modern-python -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install mycelium-io/mycelium modern-python --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mycelium-io/mycelium.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/modern-python .opencode/skills/modern-python && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "modern-python" agent skill from https://github.com/mycelium-io/mycelium/tree/main/.claude/skills/modern-python into .opencode/skills/modern-python/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "modern-python", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
modern-python- GitHub stars
- 119
- Token cost
- ~752 tokens
- SKILL.md length
- 224 words
- Files
- 1
- Skills in repo
- 7
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Modern Python tooling practices for the mycelium project. An agent skill from mycelium-io/mycelium.
- Installing dependencies
- SKILL.md covers Core Rules, Quick Reference, Project Structure and Linting & Formatting, plus 3 more sections
- Calls uv, pip and python
- Managing environments
What it does
Modern Python is an agent skill from mycelium-io/mycelium. Modern Python tooling practices for the mycelium project. Use when installing dependencies, running tools, managing environments, or writing Python code. Always active as a background reference.
Its SKILL.md is about 750 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Development, covering Linting and formatting. It works with Python, Ruff, pytest and FastAPI. The repository describes itself as: Multi-agent coordination + persistent memory, semantic negotiation, async rooms, and a shared knowledge graph.
When your agent uses it
- Installing dependencies
- Managing environments
- Writing Python code
Example prompts
- “/modern-python”
Requirements
- Python 3
What it can do on your machine
Read from SKILL.md and the folder at commit a45bca1. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
uvpippythonruff
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use uv and pip, which can reach the network depending on how they are called.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Modern Python loads about 752 tokens when it runs. Until then it costs about 52 tokens; SKILL.md has 224 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 224 words (~752 tokens).
“This project uses uv for package management, ruff for linting/formatting, and pytest for testing.”
- name
- modern-python
Files
Just SKILL.md in .claude/skills/modern-python of mycelium-io/mycelium.
Open the folder on GitHubat commit a45bca1
Compare with similar skills
Modern Python next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Modern Python this skillmycelium-io/mycelium | 119 | — | ~752 | Automated safety check: Pass | Custom licence | |
| Pythonericrisco/rsc-harness | 156 | — | ~3.8k | Automated safety check: Pass | MIT | |
| Cb Code QualityBlkLeg/CircuitBreaker | 201 | — | ~1.9k | Automated safety check: Pass | MIT | |
| Python Rulessoftspark/ai-toolkit | 179 | — | ~2.9k | Automated safety check: Pass | Apache-2.0 | |
| Kedro Babysitkedro-org/kedro | 11k | — | ~4k | Automated safety check: Pass | Custom licence | |
| Modern Pythonantoinebou12/uml-mcp | 105 | — | ~1k | Automated safety check: Pass | MIT |
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Circuit Breaker code conventions and the quality gates that actually block a push — ruff, mypy, eslint, the pytest coverage ratchet, and the make verify tiers.
Python Rules
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Python coding rules: style, patterns, security, testing. An agent skill from softspark/ai-toolkit.
Kedro Babysit
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Run Kedro's local lint / format / type-check / tests on changed files (uses the project's pre-commit hooks, ruff, mypy, pytest, lint-imports, detect-secrets, Make targets — in the right venv), or…
Modern Python
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Modern Python tooling and best practices using uv, ruff, ty, and pytest.
Specx Project Tooling
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Add strict Python project tooling for a specx service. An agent skill from maksimzayats/specx.
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Screenshot
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Take a screenshot of the running Mycelium app, or of CLI output rendered as a terminal card, or record a short video of a flow with a visible cursor and click/zoom animations.
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Related
Categories
Questions about Modern Python
What does Modern Python do?
Modern Python tooling practices for the mycelium project. An agent skill from mycelium-io/mycelium. Modern Python is an agent skill from mycelium-io/mycelium. Modern Python tooling practices for the mycelium project.
When should I use Modern Python?
Modern Python fits situations like: installing dependencies; managing environments; writing Python code.
How do I install Modern Python in Claude Code?
Run `npx skills add mycelium-io/mycelium --skill modern-python -a claude-code`. Or copy the skill folder (.claude/skills/modern-python in mycelium-io/mycelium) into .claude/skills/modern-python in your project. Claude Code loads it when a task matches its description.
How do I install Modern Python in Codex?
Run `npx skills add mycelium-io/mycelium --skill modern-python -a codex`. Or copy the skill folder (.claude/skills/modern-python in mycelium-io/mycelium) into .agents/skills/modern-python in your project. Codex loads it when a task matches its description.
Can I use Modern Python in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add mycelium-io/mycelium --skill modern-python -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/modern-python, .gemini/skills/modern-python, .github/skills/modern-python and .opencode/skills/modern-python in your project.
What does Modern Python need to run?
Going by SKILL.md and its folder, Modern Python needs the command-line tools its instructions call (uv, pip, python and ruff). Our summary lists: Python 3.
Does Modern Python access the network?
SKILL.md contains no URLs. Its commands use uv and pip, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is Modern Python safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Modern Python use?
Modern Python has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Modern Python use?
About 752 tokens (SKILL.md is roughly 3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Modern Python?
Skills that share tags, products or a category with Modern Python: Python (ericrisco/rsc-harness, 156 stars), Cb Code Quality (BlkLeg/CircuitBreaker, 201 stars), Python Rules (softspark/ai-toolkit, 179 stars) and Kedro Babysit (kedro-org/kedro, 11k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Modern Python?
mycelium-io (a GitHub organization) maintains it in mycelium-io/mycelium, which has 119 GitHub stars. The repository holds 7 skills in this directory. The repository was last updated on October 7, 2026.
Source: mycelium-io/mycelium on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.