# Python

> |

- **Type:** Skill
- **Install:** `agentstack add skill-policyengine-policyengine-claude-python-skill`
- **Verified:** Pending review
- **Seller:** [PolicyEngine](https://agentstack.voostack.com/s/policyengine)
- **Installs:** 0
- **Category:** [Agent Skills](https://agentstack.voostack.com/c/agent-skills)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [PolicyEngine](https://github.com/PolicyEngine)
- **Source:** https://github.com/PolicyEngine/policyengine-claude/tree/main/skills/technical-patterns/python-skill

## Install

```sh
agentstack add skill-policyengine-policyengine-claude-python-skill
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# Python Environment — PolicyEngine Standard

All PolicyEngine Python work uses **uv** with **Python 3.13** and a local `.venv`.

## Required tools

- [`uv`](https://docs.astral.sh/uv/) — fast Python package and project manager
- Python 3.13 (installed/managed via uv)

Install uv if not present:

```bash
curl -LsSf https://astral.sh/uv/install.sh | sh
```

---

## Creating a new environment

Always create a `.venv` at the project root using Python 3.13:

```bash
uv venv --python 3.13
source .venv/bin/activate
```

On Windows:

```bash
uv venv --python 3.13
.venv\Scripts\activate
```

---

## Installing packages

Always use `uv pip install`, never bare `pip install`:

```bash
# Install a package
uv pip install policyengine

# Install from requirements file
uv pip install -r requirements.txt

# Install the current project in editable mode
uv pip install -e .

# Install with extras
uv pip install -e ".[dev]"
```

### Verifying latest package versions

If the user asks for the "latest", "current", or "newest" version of a Python
package, verify it from PyPI immediately before installing or pinning it.
Do not treat search snippets, local installed versions, lockfiles, stale docs,
or repo dependency constraints as proof of latest.

```bash
export PACKAGE=policyengine

# Authoritative PyPI metadata.
python - ` as an alternative to activating the venv manually
- If a venv conflict warning appears, use `deactivate` then `uv run`

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [PolicyEngine](https://github.com/PolicyEngine)
- **Source:** [PolicyEngine/policyengine-claude](https://github.com/PolicyEngine/policyengine-claude)
- **License:** MIT

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** yes
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** yes
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: flagged — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-policyengine-policyengine-claude-python-skill
- Seller: https://agentstack.voostack.com/s/policyengine
- Browse the marketplace: https://agentstack.voostack.com/browse

---
Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.