uv-package-manager

uv-package-manager is a skill for Claude Code, Codex from leonardodalinky/SciDER. It costs 30 tokens per session (370 once invoked), scanned A, original, Apache-2.0.

A tool for installing Python packages, managing project dependencies, and creating virtual environments, which keep each project’s packages separate. It also supports dependency lockfiles and selecting Python versions.

In plain words
What is it for?
Creating environments, adding or removing packages, installing locked dependencies, running Python commands and test tools, and choosing a project’s Python version.
Why use it?
It reduces the manual work of setting up Python projects and helps keep the installed packages consistent. It can be used with both modern project files and traditional requirements files.

Skill for Claude CodeCodex

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

Good fit Creating environments, adding or removing packages, installing locked dependencies, running Python commands and test tools, and choosing a project’s Python version.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/leonardodalinky/scider/uv-package-manager
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 leonardodalinky/SciDER --skill uv-package-manager
Clone the repo
git clone --depth 1 https://github.com/leonardodalinky/SciDER

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 uv-package-manager

README.md
[![agentmods](https://agentmods.dev/badge/skills/leonardodalinky/scider/uv-package-manager/github.svg)](https://agentmods.dev/skills/leonardodalinky/scider/uv-package-manager)
Your own site
<a href="https://agentmods.dev/skills/leonardodalinky/scider/uv-package-manager"><img src="https://agentmods.dev/badge/skills/leonardodalinky/scider/uv-package-manager/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 uv-package-manager

Your own site · 80×15
<a href="https://agentmods.dev/skills/leonardodalinky/scider/uv-package-manager"><img src="https://agentmods.dev/badge/skills/leonardodalinky/scider/uv-package-manager.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 30 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 370 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.
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 $0.00030 $0.00370
Opus 5 $0.00015 $0.00185
Sonnet 5 $0.00006 $0.00074
Haiku 4.5 $0.00003 $0.00037

Measured 10d ago against content hash f2e80f6c2424, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

uv-package-manager 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 10d 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.

.scider/skills/uv-package-manager/SKILL.md · 44 lines

What it actually says

UV Package Manager

uv is an extremely fast Python package installer (10-100x faster than pip), written in Rust.

Essential Commands

# Virtual environment
uv venv                         # Create .venv
uv venv --python 3.12           # With specific Python version
uv run python script.py         # Run in venv (no activation needed)
uv run pytest                   # Run CLI tool in venv

# Dependency management (pyproject.toml based)
uv add requests pandas          # Add packages
uv add --dev pytest black       # Add dev dependencies
uv remove requests              # Remove package
uv sync                         # Install all dependencies from lockfile
uv lock                         # Create/update lockfile

# pip-compatible interface
uv pip install -r requirements.txt   # Install from requirements
uv pip install package_name          # Install single package
uv pip list                          # List installed packages

# Python version management
uv python install 3.12          # Install Python version
uv python pin 3.12              # Pin version for project

Key Patterns

  • New project: uv init . && uv add <deps> && uv run python main.py
  • Existing project: uv sync to install all deps from lockfile
  • Run without activating venv: Always use uv run <command> instead of activating
  • Prefer uv add over uv pip install — it updates pyproject.toml and lockfile
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. 10d ago First seen · 44 lines · 30 tokens per session scan A f2e80f6c2424

Subscribe to this mod's changes

uv-package-manager is a skill published in the GitHub repository leonardodalinky/SciDER (88 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 30 tokens to every session and 370 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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