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 armanzeroeight/fastagent-plugins --skill python-packaginggit clone --depth 1 https://github.com/armanzeroeight/fastagent-pluginsWrote 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/armanzeroeight/fastagent-plugins/python-packaging)<a href="https://agentmods.dev/skills/armanzeroeight/fastagent-plugins/python-packaging"><img src="https://agentmods.dev/badge/skills/armanzeroeight/fastagent-plugins/python-packaging.svg" alt="Measured on agentmods" 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 | $0.00043 | $0.02584 |
| Opus 5 | $0.00022 | $0.01292 |
| Sonnet 5 | $0.00009 | $0.00517 |
| Haiku 4.5 | $0.00004 | $0.00258 |
Grade A, and why
python-packaging 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 4d 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.
How it starts
The opening of the file, as written. The whole thing — 475 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Python Packaging
Configure Python package metadata and build configuration for distribution.
Quick Start
Create pyproject.toml with UV or setuptools configuration for package distribution.
Instructions
Choosing Build System
Use UV with pyproject.toml (recommended) when:
- Starting new projects
- Want fast, modern tooling
- Need dependency management + packaging
- Building libraries for PyPI
- Want PEP 621 compliance
Use setuptools (pyproject.toml + setup.py) when:
- Maintaining existing projects
- Need compatibility with older tools
- Require custom build steps
- Complex C extensions
Use setuptools (pyproject.toml only) when:
- Modern setuptools-only approach
- No custom build logic
- Want declarative configuration
- PEP 621 compliance
UV Configuration (Recommended)
Create pyproject.toml with UV (PEP 621 standard):
[project]
name = "my-package"
version = "0.1.0"
description = "Package description"
readme = "README.md"
requires-python = ">=3.9"
license = {text = "MIT"}
authors = [
{name = "Your Name", email = "[email protected]"}
]
keywords = ["keyword1", "keyword2"]
classifiers = [
"Development Status :: 3 - Alpha",
"Intended Audience :: Developers",
"License :: OSI Approved :: MIT License",
"Programming Language :: Python :: 3",
"Programming Language :: Python :: 3.9",
"Programming Language :: Python :: 3.10",
"Programming Language :: Python :: 3.11",
]
dependencies = [
"requests>=2.28.0",
]
[project.optional-dependencies]
dev = [
"pytest>=7.0.0",
"black>=23.0.0",
"mypy>=1.0.0",
]
[project.scripts]
my-cli = "my_package.cli:main"
[project.urls]
Homepage = "https://github.com/username/my-package"
Repository = "https://github.com/username/my-package"
[build-system]
requires = ["hatchling"]
build-backend = "hatchling.build"
Key fields:
name: Package name (use hyphens, will be converted to underscores for import)version: Semantic versioning (MAJOR.MINOR.PATCH)requires-python: Python version constraintdependencies: Runtime dependencies with version constraintsoptional-dependencies: Development and optional dependenciesscripts: Console script entry points
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.
- 4d ago First seen · 475 lines · 43 tokens per session scan A 27df7cc050a6
python-packaging is a skill published in the GitHub repository armanzeroeight/fastagent-plugins (29 stars, last pushed 1mo ago), licensed MIT. It adds 43 tokens to every session and 2,584 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 2026-09-03.
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