Python Env

What it does

When your agent uses it

• Python environment
• Install package

Example prompts

• “/python-env”

Requirements

• Python 3
• Compatibility (from SKILL.md): Requires uv CLI tool. Install: curl -LsSf https://astral.sh/uv/install.sh | sh
• Pre-approved tools (allowed-tools): Bash

What it can do on your machine

Read from SKILL.md and the folder at commit 4ac52da. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves these tools, so the agent can use them without asking each time:

  • Bash

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Ships 1 file in scripts/, which the agent can run.

  Shell commands in SKILL.md call:

  • uv
  • uvx

  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 uvx, 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.

• Compatibility

  Requires uv CLI tool. Install: curl -LsSf https://astral.sh/uv/install.sh | sh

  From compatibility in the SKILL.md frontmatter.

Context cost

Python Env loads about 1.3k tokens when it runs, and up to ~5.9k if it reads all its reference files. Until then it costs about 43 tokens; SKILL.md has 425 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~43

When it runs · the whole SKILL.md, loaded when a task matches

~1.3k

With references · SKILL.md plus every file in references/, read only if the agent opens them

~5.9k

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

• NotePipes a well-known installer script into a shellSKILL.md:5

  bility: "Requires uv CLI tool. Install: curl -LsSf https://astral.sh/uv/install.sh | sh"

• NotePre-approves every shell command (allowed-tools: Bash)SKILL.md

  allowed-tools: Bash

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); the scripts in this folder are not scanned.

SKILL.md

The full file from aiskillstore/marketplace at commit 4ac52da, republished under its MIT licence (© aiskillstore). 425 words, ~1,339 tokens.

name

python-env

description

Fast Python environment management with uv (10-100x faster than pip). Triggers on: uv, venv, pip, pyproject, python environment, install package, dependencies.

allowed-tools

Bash

compatibility

Requires uv CLI tool. Install: curl -LsSf https://astral.sh/uv/install.sh | sh

license

MIT

metadata.author

claude-mods

# Application (flat layout, no package build)
uv init myapp

# Installable package (src/ layout — separate tests/ that import by name)
uv init --package wordtools
# → src/wordtools/__init__.py, pyproject.toml with build-system

# Add runtime deps (writes to [project.dependencies] + updates the lockfile)
uv add "httpx>=0.25" pydantic

# Add dev-only deps (writes to the dev dependency-group)
uv add --dev pytest ruff mypy

# Add with extras
uv add "fastapi[standard]"

# Remove
uv remove httpx

# Install everything from pyproject + uv.lock into .venv (reproducible)
uv sync

# Refresh the lockfile (e.g. after manual pyproject edits)
uv lock

uv run python script.py     # run a script in the project env
uv run pytest               # run a tool from the dev group
uv run -- ruff check .      # `--` ends uv flag parsing

uv tool install ruff        # persistent, isolated, on PATH
uv tool upgrade ruff
uvx ruff check .            # ephemeral one-shot run, nothing installed

uv python install 3.12      # download a managed interpreter
uv python list              # show available + installed
uv init --python 3.12 app   # pin a project to a version

[project]
name = "my-project"
version = "0.1.0"
requires-python = ">=3.11"
dependencies = [
    "httpx>=0.25",
    "pydantic>=2.0",
]

# Dev deps live here; `uv add --dev <pkg>` manages this group.
[dependency-groups]
dev = [
    "pytest>=8.0",
    "ruff>=0.4",
    "mypy>=1.10",
]

uv venv                              # bare venv (no project)
uv pip install -r requirements.txt   # legacy requirements file
uv pip install -e .                  # editable install into an unmanaged venv
uv pip compile requirements.in -o requirements.txt   # pin a requirements.txt

© aiskillstore, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 6 other files (scripts, references, assets) in skills/0xdarkmatter/python-env of aiskillstore/marketplace.

• SKILL.md
• assets/.gitkeep
• references/dependency-management.md
• references/publishing.md
• references/pyproject-patterns.md
• scripts/.gitkeep
• skill-report.json

Open the folder on GitHubat commit 4ac52da

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in aiskillstore/marketplace, which our catalogue first saw on October 7, 2026.

• NeverSight/learn-skills.devdata/skills-md/0xdarkmatter/claude-mods/python-env