Python Package Metadata Best Practices (That Actually Get Checked)

Your package's metadata is the first thing a stranger sees on PyPI. A missing description, a "Proprietary" license on an open-source tool, or a changelog that still says 0.1.0 signals "abandoned" faster than any bug. Here are the seven mistakes that quietly kill trust — and how to catch them automatically.

1. Version drift (the silent killer)

If pyproject.toml, __init__.__version__, and your git tag disagree, you've shipped a contradiction. metaguard fails the build on any mismatch.

2. Missing PEP 621 fields

Since PEP 621, metadata lives in [project]. Forgetting description, authors, requires-python, or readme leaves your PyPI page half-empty. Minimum viable:

[project]
name = "yourpkg"
version = "1.0.0"
description = "One line, no buzzwords."
authors = [{name = "You"}]
license = {text = "MIT"}
requires-python = ">=3.9"
readme = "README.md"

3. License declared, file missing

Declaring license = {text = "MIT"} but shipping no LICENSE file is a legal gray zone that spooks enterprise users. If you declare it, ship the file.

4. Stale changelog

A CHANGELOG.md whose top entry doesn't match the current version tells users you don't actually maintain the log. Keep the top header synced to the release.

5. Leaked secrets

A .env, *.pem, or .pypirc committed to the repo is an incident waiting to happen. These should never be publishable. (Note: secret files listed in .gitignore are correctly skipped by scanners.)

6. Dead README links

Links to docs that 404 make a package look dead. metaguard can probe README URLs over the network in CI:

metaguard check . --check-links

7. Inconsistent naming

Your PyPI name (kryptorious-devflow), your import name (devflow), and your repo name should be obviously related. Mismatches confuse installers.

Enforce it, don't remember it

None of this should be a manual checklist. Run a metadata scanner as a CI gate so every publish is forced through the same bar:

- name: Metadata hygiene
  run: pip install kryptorious-metaguard && metaguard check .

A clean scan reports Metadata Health: 100/100 and exits 0. Any error-severity issue exits 1 and blocks the release. That's the entire difference between a package that looks maintained and one that doesn't.

Tool: kryptorious-metaguard. Part of the Kryptorious developer toolkit (33 tools, $9 lifetime).

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