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.
npx skills add julianobarbosa/claude-code-skills --skill uvgit clone --depth 1 https://github.com/julianobarbosa/claude-code-skillsWrote 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.
[](https://agentmods.dev/skills/julianobarbosa/claude-code-skills/uv)<a href="https://agentmods.dev/skills/julianobarbosa/claude-code-skills/uv"><img src="https://agentmods.dev/badge/skills/julianobarbosa/claude-code-skills/uv/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.
<a href="https://agentmods.dev/skills/julianobarbosa/claude-code-skills/uv"><img src="https://agentmods.dev/badge/skills/julianobarbosa/claude-code-skills/uv.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00067 | $0.04677 |
| Opus 5 | $0.00034 | $0.02338 |
| Sonnet 5 | $0.00013 | $0.00935 |
| Haiku 4.5 | $0.00007 | $0.00468 |
Grade C, and why
uv scanned grade C with 2 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 8d 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.
Downloads and executes remote codehighSupply chain
curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.
curl -LsSf https://astral.sh/uv/install.sh | sh Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -LsSf https://astral.sh/uv/install.sh | sh How it starts
The opening of the file, as written. The whole thing — 737 lines — stays where its author put it; the contents beside it link to each section on GitHub.
uv Skill
Extremely fast Python package and project manager by Astral (Ruff creators).
Overview
uv is a single tool that replaces:
- pip/pip-tools - Package installation and dependency resolution
- virtualenv/venv - Virtual environment creation
- pyenv - Python version management
- pipx - Tool installation and execution
- poetry/pdm - Project and dependency management
- twine - Package publishing
Key Features:
- 10-100x faster than pip
- Universal lockfile (
uv.lock) for reproducible builds - Automatic Python version management
- Built-in tool execution (
uvx) - PEP 723 inline script dependencies
- Drop-in pip compatibility
Quick Reference
| Task | Command |
|---|---|
| New project | uv init |
| New library | uv init --lib |
| Add package | uv add <pkg> |
| Add dev dependency | uv add --dev <pkg> |
| Remove package | uv remove <pkg> |
| Install all deps | uv sync |
| Install (CI/prod) | uv sync --locked |
| Run command | uv run <cmd> |
| Run tool (no install) | uvx <tool> |
| Install Python | uv python install 3.12 |
| Pin Python version | uv python pin 3.12 |
| Update all deps | uv lock --upgrade |
| Update one package | uv lock --upgrade-package <pkg> |
| Show dep tree | uv tree |
| Build package | uv build |
| Publish to PyPI | uv publish |
Quick Start
Installation
# macOS/Linux
curl -LsSf https://astral.sh/uv/install.sh | sh
# Windows
powershell -ExecutionPolicy ByPass -c "irm https://astral.sh/uv/install.ps1 | iex"
# Via pip/pipx
pipx install uv
pip install uv
# Homebrew
brew install uv
Shell Completion
# Bash
echo 'eval "$(uv generate-shell-completion bash)"' >> ~/.bashrc
# Zsh
echo 'eval "$(uv generate-shell-completion zsh)"' >> ~/.zshrc
# Fish
echo 'uv generate-shell-completion fish | source' > ~/.config/fish/completions/uv.fish
Essential Commands
1. Starting a Project
# Create new project
uv init my-project # Application (default)
uv init --lib my-library # Library (src layout, build backend)
uv init --app my-app # Explicit application
# Set Python version
uv python pin 3.12 # Creates .python-version
# Install Python if needed
uv python install 3.12
What ships with it
8 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- references/cli-commands.md 18 KB
- references/integrations.md 12 KB
- references/project-management.md 13 KB
- References/python-project-references/flask-patterns.md 6.3 KB
- References/python-project-references/uv-commands.md 4.3 KB
- References/python-project-scripts/init-project.sh 2.7 KB runs code
- References/python-project.md 3.7 KB
- references/python-versions.md 8.4 KB
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.
- 8d ago First seen · 737 lines · 67 tokens per session scan C 8cd355e3a4f5
uv is a skill published in the GitHub repository julianobarbosa/claude-code-skills (10 stars, last pushed 16d ago), licensed MIT. It adds 67 tokens to every session and 4,677 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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