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 basher83/lunar-claude --skill python-uv-scriptsgit clone --depth 1 https://github.com/basher83/lunar-claudeWrote 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/basher83/lunar-claude/python-uv-scripts)<a href="https://agentmods.dev/skills/basher83/lunar-claude/python-uv-scripts"><img src="https://agentmods.dev/badge/skills/basher83/lunar-claude/python-uv-scripts/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/basher83/lunar-claude/python-uv-scripts"><img src="https://agentmods.dev/badge/skills/basher83/lunar-claude/python-uv-scripts.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00031 | $0.03336 |
| Opus 5.5 | $0.00012 | $0.01334 |
| Sonnet 5.5 | $0.00006 | $0.00667 |
| Haiku 4.5 | $0.00003 | $0.00334 |
Grade A, and why
python-uv-scripts scanned grade A with 1 finding 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 1mo 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.
Runs shell commandslowCapability
Expected in a hook, worth knowing in a rule or an instructions file.
result = subprocess.run( How it starts
The opening of the file, as written. The whole thing — 547 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Python Single-File Scripts with uv
Expert guidance for creating production-ready, self-contained Python scripts using uv's inline dependency management (PEP 723).
Quick Start
Create Your First uv Script
#!/usr/bin/env -S uv run --script
# /// script
# requires-python = ">=3.11"
# dependencies = [
# "httpx>=0.27.0",
# "rich>=13.0.0",
# ]
# ///
import httpx
from rich import print
response = httpx.get("https://api.github.com")
print(f"[green]Status: {response.status_code}[/green]")
Make it executable:
chmod +x script.py
./script.py # uv automatically installs dependencies
Convert Existing Script
# Add inline metadata to existing script
./tools/convert_to_uv.py existing_script.py
# Validate PEP 723 metadata
./tools/validate_script.py script.py
Core Concepts
What is PEP 723?
PEP 723 defines inline script metadata for Python files:
# /// script
# requires-python = ">=3.11"
# dependencies = [
# "package>=1.0.0",
# ]
# ///
Benefits:
- ✅ Dependencies live with the code
- ✅ No separate
requirements.txt - ✅ Reproducible execution
- ✅ Version constraints included
- ✅ Self-documenting
uv Script Execution Modes
Mode 1: Inline Dependencies (Recommended for utilities)
#!/usr/bin/env -S uv run --script
# /// script
# dependencies = ["httpx"]
# ///
Mode 2: Project Mode (For larger scripts)
uv run script.py # Uses pyproject.toml
Mode 3: No Dependencies
#!/usr/bin/env -S uv run
# Standard library only
Critical Anti-Patterns: What NOT to Do
❌ NEVER Use [tool.uv.metadata]
WRONG - This will cause errors:
# /// script
# requires-python = ">=3.11"
# [tool.uv.metadata] # ❌ THIS DOES NOT WORK
# purpose = "testing"
# ///
Error:
error: TOML parse error at line 3, column 7
unknown field `metadata`
Why: [tool.uv.metadata] is not part of PEP 723 and is not supported by uv.
What ships with it
23 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.
- anti-patterns/common-mistakes.md 7.1 KB
- anti-patterns/when-not-to-use.md 7.1 KB
- assets/templates/api-client.py 1.7 KB runs code
- assets/templates/basic-script.py 464 B runs code
- assets/templates/cli-app.py 1.4 KB runs code
- assets/templates/data-processor.py 2.1 KB runs code
- examples/03-production-ready/check_cluster_health_enhanced.py 7.3 KB runs code
- examples/04-api-clients/netbox_client.py 10 KB runs code
- patterns/api-clients.md 4.2 KB
- patterns/cli-applications.md 2.2 KB
- patterns/data-processing.md 1.1 KB
- patterns/error-handling.md 3.8 KB
- patterns/security-patterns.md 895 B
- patterns/system-automation.md 1.4 KB
- reference/bash-to-python.md 5.3 KB
- reference/dependency-management.md 1.3 KB
- reference/pep-723-spec.md 6.9 KB
- reference/security-patterns.md 11 KB
- tools/convert_to_uv.py 16 KB runs code
- tools/validate_script.py 10 KB runs code
- workflows/ci-cd-integration.md 1.3 KB
- workflows/team-adoption.md 1.4 KB
- workflows/testing-strategies.md 1.3 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.
- 1mo ago First seen · 547 lines · 31 tokens per session scan A a4e2229c66be
python-uv-scripts is a skill published in the GitHub repository basher83/lunar-claude (23 stars, last pushed yesterday), licensed MIT. It adds 31 tokens to every session and 3,336 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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