python-pypi-package-builder SKILL.md skillA
python-pypi-package-builder from marielynneblock/arcanum-artifex is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add marielynneblock/arcanum-artifex/python-pypi-package-builder@git:20260710.ffb3400Pins git:20260710.ffb3400 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- marielynneblock/arcanum-artifex
- Path
skills/development/python/python-pypi-package-builder/SKILL.md- Versions recorded
- 3
- Latest version
- git:20260710.ffb3400, committed Jul 10, 2026
- First version recorded
- May 10, 2026
- Size
- 19,234 bytes
- Repository stars
- 4
- License
- none declared
End-to-end skill for building, testing, linting, versioning, and publishing a production-grade Python library to PyPI. Covers all four build backends (setuptools+setuptools_scm, hatchling, flit, poetry), PEP 440 versioning, semantic versioning, dynamic git-tag versioning, OOP/SOLID design, type hints (PEP 484/526/544/561), Trusted Publishing (OIDC), and the full PyPA packaging flow. Use for: creating Python packages, pip-installable SDKs, CLI tools, framework plugins, pyproject.toml setup…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Python PyPI Package Builder Skill A complete, battle-tested guide for building, testing, linting, versioning, typing, and publishing a production-grade Python library to PyPI — from first commit to community-ready release. > **AI Agent Instruction:** Read this entire file before writing a single line of code or > creating any file. Every decision — layout, backend, versioning strategy, patterns, CI — > has a decision rule here. Follow the decision trees in order. This skill applies to any > Python package type (utility, SDK, CLI, plugin, data library). Do not skip sections. --- ## Quick Navigation | Section in this file | What it covers | |---|---| | [1. Skill Trigger](#1-skill-trigger) | When to load this skill | | [2. Package Type Decision](#2-package-type-decision) | Identify what you are building | | [3. Folder Structure Decision](#3-folder-structure-decision) | src/ vs flat vs monorepo | | [4. Build Backend Decision](#4-build-backend-decision) | setuptools / hatchling / flit / poetry | | [5. PyPA Packaging Flow](#5-pypa-packaging-flow) | The canonical publish pipeline | | [6. Project Structure Templates](#6-project-structure-templates) | Full layouts for every option | …
Read the whole file at its exact version.
How to install
mdr add marielynneblock/arcanum-artifex/python-pypi-package-builder@sha256:11088d9360fc9f14The line at the top of this page pins the label git:20260710.ffb3400, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_kers62jjgruwrxqd)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between May 10, 2026 and Jul 10, 2026, about one every 30 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260710.ffb3400 latest | 2026-07-10 | ffb3400 | 19,234 B | A | view · diff |
| git:20260515.b861afb | 2026-05-15 | b861afb | 19,234 B | A | view · diff |
| git:20260510.f26bcec | 2026-05-10 | f26bcec | 19,188 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (19234 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
marielynneblock/arcanum-artifex · 4 stars · license none declared · pushed 2026-09-19 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_kers62jjgruwrxqd GET https://markdownregistry.com/api/v1/resolve?ref=marielynneblock/arcanum-artifex/python-pypi-package-builder GET https://markdownregistry.com/api/v1/blob/11088d9360fc9f14a2d8a6e8bc5d1b5f4182b9bc9c184955afc5fc221d2cac34
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.